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https://github.com/TheAlgorithms/C
synced 2024-11-21 21:11:57 +03:00
Merge branch 'master' into leetcode/zigzag
This commit is contained in:
straight-into-the-wall
commit
b46a6afd52
@ -94,7 +94,9 @@
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* [List](https://github.com/TheAlgorithms/C/blob/master/data_structures/list/list.c)
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* [List](https://github.com/TheAlgorithms/C/blob/master/data_structures/list/list.h)
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* [Main](https://github.com/TheAlgorithms/C/blob/master/data_structures/list/main.c)
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* [Queue](https://github.com/TheAlgorithms/C/blob/master/data_structures/queue.c)
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* Queue
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* [Include](https://github.com/TheAlgorithms/C/blob/master/data_structures/queue/include.h)
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* [Queue](https://github.com/TheAlgorithms/C/blob/master/data_structures/queue/queue.c)
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* [Stack](https://github.com/TheAlgorithms/C/blob/master/data_structures/stack.c)
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* Stack
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* [Main](https://github.com/TheAlgorithms/C/blob/master/data_structures/stack/main.c)
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173
leetcode/src/1.c
173
leetcode/src/1.c
@ -1,17 +1,168 @@
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/**
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* @file
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* @brief TwoSum leetcode problem solution.
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* @details
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* This is a recursive solution for the leetcode problem of TwoSum.
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* @author [straight_into_the_wall](https://github.com/straight-into-the-wall)
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* @see https://leetcode.com/problems/two-sum/
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*/
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#include <assert.h> /// for assert
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#include <stdint.h> /// for unsigned int with fixed size
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#include <stdlib.h> /// for everithing else
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int* ending(int* a, int* b, int* returnSize);
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/**
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* @brief Given an array of integers and an integer target,
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* find the two numbers such that they add up to a given target.
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* @param nums the array of integer to be processed.
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* @param numsSize the size of array on input.
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* @param target the integer to be matched.
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* @param returnSize a pointer to the size of the output array.
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* @returns an array of the indices of the two numbers such that they add up to
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* target.
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*/
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int* twoSum(int* nums, int numsSize, int target, int* returnSize)
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{
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int i, j;
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int *ret = calloc(2, sizeof(int));
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for (i = 0; i < numsSize; i++)
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{
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int key = target - nums[i];
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for (j = i + 1; j < numsSize; j++)
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if (nums[j] == key)
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{
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ret[0] = i;
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ret[1] = j;
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}
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int needle = target - nums[--numsSize];
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for (int i = numsSize - 1; i >= 0; i--)
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if (needle == nums[i])
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return ending(&i, &numsSize, returnSize);
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return twoSum(nums, numsSize, target, returnSize);
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}
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/**
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* @brief Prepare the output at the end of the execution. Just to keep tidy the
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* main function.
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* @param a an index of the solution.
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* @param b the other index of the solution.
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* @param returnSize a pointer to the size of the output array (always 2 on
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* success).
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* @returns an array of the indices of the two numbers such that they add up to
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* target.
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*/
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int* ending(int* a, int* b, int* returnSize)
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{
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*returnSize = 2;
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int* ret = calloc(*returnSize, sizeof(int));
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ret[0] = *a;
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ret[1] = *b;
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return ret;
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}
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/**
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* @brief Self-test implementations
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* @returns void
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*/
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static void testTwoSum(int* nums, int numsSize, int target)
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{
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int retSize = 0;
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int* ret = twoSum(nums, numsSize, target, &retSize);
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for (int i = 0; i < retSize; i++) target -= nums[ret[i]];
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free(ret);
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assert(!target);
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}
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static void test(void)
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{
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int nums[4] = {2, 7, 11, 15};
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testTwoSum(nums, 4, 9);
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int nums1[4] = {2, -7, 11, 15};
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testTwoSum(nums1, 4, 4);
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int nums2[3] = {3, 2, 4};
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testTwoSum(nums2, 3, 6);
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int nums3[2] = {3, 3};
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testTwoSum(nums3, 2, 6);
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int nums4[3] = {3, -3, 6};
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testTwoSum(nums4, 3, 0);
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int nums5[6] = {-13, 0, 13, 7, -3, 6};
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testTwoSum(nums5, 6, -7);
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int nums6[5] = {-1, -2, -3, -4, -5};
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testTwoSum(nums6, 5, -8);
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int nums7[] = {
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1931729, 5896941, -56160, -5999108, -713650, 3135403, 870300,
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-2938196, -726482, -152831, -5552046, -6857780, 2493109, -2409591,
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7453630, 7848984, -806578, 4976647, -9199319, -7660981, 4168359,
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5466164, 8577624, -7465790, -7808993, -7176396, -3622579, 4996177,
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9623530, -1371773, -5633028, 5188756, 7971646, -2603602, 7490338,
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3174208, -1825054, 6892503, -8201151, -1072749, -2746872, -718104,
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-1804706, 5504856, -9104958, -2181797, 3151933, -6116343, 1436458,
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-659793, -9256591, -3487143, 3396195, -6211129, -2789647, -9336842,
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-122743, -3843085, 8515885, -8551842, -8668581, -5040156, -9626107,
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-5645393, -5484621, -6417906, 4483313, -4197219, -5762688, -6645419,
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1077632, 7237401, 4819732, 5220382, 8657346, 651862, 7406097,
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6668849, 5067699, 4563307, -4358391, -3996666, -4298897, -9870277,
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-628517, 1842975, -4970541, -8815324, -4174656, -9332000, 4647373,
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9461387, -3504914, 2614670, -1315721, 6099266, -8562834, -4488116,
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9742133, 307556, 791291, -2611787, 7656675, 9932436, -1905766,
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5142745, 7210001, -4678645, 550797, 8462302, 6815722, -2985059,
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-1236401, -6093644, -6617192, -9438320, 8400183, 8936598, 5378080,
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9758788, 817106, 8613435, 3579880, -9100698, 993960, 5352546,
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8481471, 3526666, 2961295, -7819498, 834324, 3435605, 9725655,
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8490290, 7263645, -6863345, 2947003, -8152353, 5514173, -9865666,
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343864, -6386758, -8675825, -3252881, 1149651, 6690889, 7528843,
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-2861961, -4722247, -6985318, -9994086, 7192089, -4864512, 5773490,
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-9492163, -2089496, 2246943, 430576, 3466065, 1578813, 2738295,
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261493, -425120, 3666399, 8796329, 9220040, 7148637, 5956722,
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9980401, 7834421, 2041136, 3763240, -831391, 7963736, 8744496,
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9593751, 4606042, 66708, -6652782, -6619264, 2614784, 5655774,
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-9547771, 2456855, 4268450, 864132, 4601358, -3464052, -8987625,
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-4427713, -126397, -5823810, 8443040, -7428684, -4365060, -6392451,
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-6258724, -9124302, -6566562, -4153846, -9120859, 7061892, -7707777,
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9342864, -2133124, -7068189, -8657201, 2752682, -9943634, -8650517,
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-5219095, 2305245, -1500154, 8915790, -2805210, 1860598, 3361037,
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-8040669, 5809813, -2243400, -3418428, -1810675, -5203397, -7879177,
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6898143, 7749161, -2810814, -7525359, -793458, 608571, -9383497,
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9531109, 6862130, -3381989, 2332039, 6018975, -3350279, 7266303,
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-7170480, -1127784, 578313, 6018329, 8822950, 4214273, -372530,
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2706552, -4905224, 3324641, -5403812, 9319424, -2882974, -9228107,
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6151855, 2634284, 7000575, 3215247, 5067619, 5076150, 1595871,
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748735, -9225927, 1962290, 4653714, 697462, 2996679, -7562085,
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-5387705, -912530, 1763635, -6139098, 2103001, -6316004, -3469182,
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-3818553, 8854173, 422707, -3826706, -9777012, 7452324, 3665456,
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-9458220, 4828502, 2641583, 5107388, -4201437, 5486625, -9315573,
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1417427, -1838955, 9042987, -9704280, 7868946, -6737802, 4462332,
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-5771637, 635858, 1438260, 8940144, 9385885, 3522022, -9736738,
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-4387243, -8611088, 8733735, -2087884, 8299364, -1004025, 2674570,
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4247204, 1972151, -2092476, -1318052, -796315, -6487458, 8714867,
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-9966767, -5459861, -1286737, 9442201, -2065902, 2575270, 7184243,
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5916475, -5728128, -3044939, 6372732, 4902791, 3474374, -7462481,
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-9886552, -8361835, -5022392, -4583670, 3990789, -1051830, 8606314,
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6365011, 6751820, 1727390, -2005234, -5845824, 9572998, 6867269,
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4000416, 5629823, -2918551, 7278467, 9865305, 3781390, -1518411,
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-7124219, 3800842, -4492377, -7479001, 4144917, 4639464, 7161451,
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3391326, -2429792, 8240315, -8667371, 101661, -6049927, -9729041,
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-2210443, -6907416, -1355534, 6292201, -1169114, -4565077, 3214740,
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-6122903, 8326559, -3973709, 2313703, 9645383, 6119383, 8317176,
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8177731, 7758979, 3037198, -9543017, -3436171, 3280360, -1444577,
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-40402, -8372623, 6672469, 9125222, 6161730, 3783090, -2778572,
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-8014616, -1588372, -3200391, 7126312, -5091311, -3637052, -6600914,
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9034974, -6246289, -4974981, -9711741, -7867786, -9808240, 450272,
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-3222991, -8251454, 3599528, -33487, -1114626, 8414308, -2607016,
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1690025, 5981016, -2898849, -4650973, -8085619, -4875585, -2677275,
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-7329644, -9730701, -5563788, 4635028, -4232606, 1863619, -9081061,
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-8966306, 4907349, 348942, -6309867, 2436213, -6340842, 8276407,
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-1112458, 4073087, 6632641, -6044509, -1714553, -9905887, 8140713,
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-5566484, -8187046, -3636448, 560425, 9931445, -8142363, 1928694,
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6652925, 5094575, 5525595, 9847315, 5323311, 9123454, 7425631,
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2116547, 9033708, -2228326, 2858537, 5452249, -3388576, 8859366,
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5965629, -9904937, 8961420, -8794807, 4363288, -1067547, 1903643,
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-6637956, 3736544, 9150157, -3977433, 4333094, -1170635, -4933425,
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5815702, 1846616, 793301, -9206787, -227043, -7076926, -461803,
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-7477454, -1297664, 47425, 8506054, 8264895, -1199514, -4031592,
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1245359, 2840097, 6948011};
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testTwoSum(nums7, 492, 7828670);
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}
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