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< div class = "headertitle" > < div class = "title" > sol3.c File Reference< / div > < / div >
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< div class = "contents" >
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< p > < a href = "https://projecteuler.net/problem=5" target = "_blank" > Problem 5< / a > solution (Fastest).
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< a href = "#details" > More...< / a > < / p >
< div class = "textblock" > < code > #include < stdio.h> < / code > < br / >
< / div > < div class = "textblock" > < div class = "dynheader" >
Include dependency graph for sol3.c:< / div >
< div class = "dyncontent" >
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< div class = "center" > < iframe scrolling = "no" frameborder = "0" src = "../../d8/d9e/problem__5_2sol3_8c__incl.svg" width = "158" height = "124" > < p > < b > This browser is not able to show SVG: try Firefox, Chrome, Safari, or Opera instead.< / b > < / p > < / iframe >
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< / div >
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Functions< / h2 > < / td > < / tr >
< tr class = "memitem:a59347107cbfdf48d51108e50280e760d" > < td class = "memItemLeft" align = "right" valign = "top" > unsigned long  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "../../d5/d7c/problem__5_2sol3_8c.html#a59347107cbfdf48d51108e50280e760d" > gcd< / a > (unsigned long a, unsigned long b)< / td > < / tr >
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< tr class = "memdesc:a59347107cbfdf48d51108e50280e760d" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > Compute < a href = "https://en.wikipedia.org/wiki/Greatest_common_divisor" target = "_blank" > Greatest Common Divisor (GCD)< / a > of two numbers using Euclids algorithm. < br / > < / td > < / tr >
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< tr class = "separator:a59347107cbfdf48d51108e50280e760d" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< tr class = "memitem:ae9606f1867e9921867d6572f51377b4c" > < td class = "memItemLeft" align = "right" valign = "top" > unsigned long  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "../../d5/d7c/problem__5_2sol3_8c.html#ae9606f1867e9921867d6572f51377b4c" > lcm< / a > (unsigned long a, unsigned long b)< / td > < / tr >
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< tr class = "memdesc:ae9606f1867e9921867d6572f51377b4c" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > Compute < a href = "https://en.wikipedia.org/wiki/Least_common_multiple" target = "_blank" > Least Common Multiple (LCM)< / a > of two numbers. < br / > < / td > < / tr >
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< tr class = "separator:ae9606f1867e9921867d6572f51377b4c" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< tr class = "memitem:a840291bc02cba5474a4cb46a9b9566fe" > < td class = "memItemLeft" align = "right" valign = "top" > int  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "../../d5/d7c/problem__5_2sol3_8c.html#a840291bc02cba5474a4cb46a9b9566fe" > main< / a > (void)< / td > < / tr >
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< tr class = "memdesc:a840291bc02cba5474a4cb46a9b9566fe" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > Main function. < br / > < / td > < / tr >
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< tr class = "separator:a840291bc02cba5474a4cb46a9b9566fe" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< / table >
< a name = "details" id = "details" > < / a > < h2 class = "groupheader" > Detailed Description< / h2 >
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< div class = "textblock" > < p > < a href = "https://projecteuler.net/problem=5" target = "_blank" > Problem 5< / a > solution (Fastest). < / p >
< p > Solution is the LCM of all numbers between 1 and 20.< / p >
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< dl class = "section see" > < dt > See also< / dt > < dd > Slowest: < a class = "el" href = "../../dc/d32/problem__5_2sol1_8c.html" title = "Problem 5 solution - Naive algorithm (slowest)" > problem_5/sol1.c< / a > < / dd >
< dd >
Slower: < a class = "el" href = "../../d5/d3d/problem__5_2sol2_8c.html" title = "Problem 5 solution - Naive algorithm (Improved over problem_5/sol1.c)" > problem_5/sol2.c< / a > < / dd > < / dl >
< / div > < h2 class = "groupheader" > Function Documentation< / h2 >
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< a id = "a59347107cbfdf48d51108e50280e760d" name = "a59347107cbfdf48d51108e50280e760d" > < / a >
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< h2 class = "memtitle" > < span class = "permalink" > < a href = "#a59347107cbfdf48d51108e50280e760d" > ◆   < / a > < / span > gcd()< / h2 >
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< div class = "memitem" >
< div class = "memproto" >
< table class = "memname" >
< tr >
< td class = "memname" > unsigned long gcd < / td >
< td > (< / td >
< td class = "paramtype" > unsigned long  < / td >
< td class = "paramname" > < em > a< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< td class = "paramtype" > unsigned long  < / td >
< td class = "paramname" > < em > b< / em >   < / td >
< / tr >
< tr >
< td > < / td >
< td > )< / td >
< td > < / td > < td > < / td >
< / tr >
< / table >
< / div > < div class = "memdoc" >
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< p > Compute < a href = "https://en.wikipedia.org/wiki/Greatest_common_divisor" target = "_blank" > Greatest Common Divisor (GCD)< / a > of two numbers using Euclids algorithm. < / p >
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< dl class = "params" > < dt > Parameters< / dt > < dd >
< table class = "params" >
< tr > < td class = "paramname" > a< / td > < td > first number < / td > < / tr >
< tr > < td class = "paramname" > b< / td > < td > second number < / td > < / tr >
< / table >
< / dd >
< / dl >
< dl class = "section return" > < dt > Returns< / dt > < dd > GCD of < code > a< / code > and < code > b< / code > < / dd > < / dl >
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< div class = "fragment" > < div class = "line" > < span class = "lineno" > 19< / span > {< / div >
< div class = "line" > < span class = "lineno" > 20< / span > < span class = "keywordtype" > unsigned< / span > < span class = "keywordtype" > long< / span > r;< / div >
< div class = "line" > < span class = "lineno" > 21< / span > < span class = "keywordflow" > if< / span > (a > b)< / div >
< div class = "line" > < span class = "lineno" > 22< / span > {< / div >
< div class = "line" > < span class = "lineno" > 23< / span > < span class = "keywordtype" > unsigned< / span > < span class = "keywordtype" > long< / span > t = a;< / div >
< div class = "line" > < span class = "lineno" > 24< / span > a = b;< / div >
< div class = "line" > < span class = "lineno" > 25< / span > b = t;< / div >
< div class = "line" > < span class = "lineno" > 26< / span > }< / div >
< div class = "line" > < span class = "lineno" > 27< / span > < span class = "keywordflow" > while< / span > ((r = (a % b)))< / div >
< div class = "line" > < span class = "lineno" > 28< / span > {< / div >
< div class = "line" > < span class = "lineno" > 29< / span > a = b;< / div >
< div class = "line" > < span class = "lineno" > 30< / span > b = r;< / div >
< div class = "line" > < span class = "lineno" > 31< / span > }< / div >
< div class = "line" > < span class = "lineno" > 32< / span > < span class = "keywordflow" > return< / span > b;< / div >
< div class = "line" > < span class = "lineno" > 33< / span > }< / div >
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< / div > <!-- fragment -->
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< a id = "ae9606f1867e9921867d6572f51377b4c" name = "ae9606f1867e9921867d6572f51377b4c" > < / a >
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< h2 class = "memtitle" > < span class = "permalink" > < a href = "#ae9606f1867e9921867d6572f51377b4c" > ◆   < / a > < / span > lcm()< / h2 >
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< div class = "memitem" >
< div class = "memproto" >
< table class = "memname" >
< tr >
< td class = "memname" > unsigned long lcm < / td >
< td > (< / td >
< td class = "paramtype" > unsigned long  < / td >
< td class = "paramname" > < em > a< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< td class = "paramtype" > unsigned long  < / td >
< td class = "paramname" > < em > b< / em >   < / td >
< / tr >
< tr >
< td > < / td >
< td > )< / td >
< td > < / td > < td > < / td >
< / tr >
< / table >
< / div > < div class = "memdoc" >
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< p > Compute < a href = "https://en.wikipedia.org/wiki/Least_common_multiple" target = "_blank" > Least Common Multiple (LCM)< / a > of two numbers. < / p >
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< dl class = "params" > < dt > Parameters< / dt > < dd >
< table class = "params" >
< tr > < td class = "paramname" > a< / td > < td > first number < / td > < / tr >
< tr > < td class = "paramname" > b< / td > < td > second number < / td > < / tr >
< / table >
< / dd >
< / dl >
< dl class = "section return" > < dt > Returns< / dt > < dd > LCM of < code > a< / code > and < code > b< / code > < / dd > < / dl >
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< div class = "fragment" > < div class = "line" > < span class = "lineno" > 42< / span > {< / div >
< div class = "line" > < span class = "lineno" > 43< / span > < span class = "keywordtype" > unsigned< / span > < span class = "keywordtype" > long< / span > < span class = "keywordtype" > long< / span > p = (< span class = "keywordtype" > unsigned< / span > < span class = "keywordtype" > long< / span > long)a * b;< / div >
< div class = "line" > < span class = "lineno" > 44< / span > < span class = "keywordflow" > return< / span > p / < a class = "code hl_function" href = "../../d5/d7c/problem__5_2sol3_8c.html#a59347107cbfdf48d51108e50280e760d" > gcd< / a > (a, b);< / div >
< div class = "line" > < span class = "lineno" > 45< / span > }< / div >
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< div class = "ttc" id = "aproblem__5_2sol3_8c_html_a59347107cbfdf48d51108e50280e760d" > < div class = "ttname" > < a href = "../../d5/d7c/problem__5_2sol3_8c.html#a59347107cbfdf48d51108e50280e760d" > gcd< / a > < / div > < div class = "ttdeci" > unsigned long gcd(unsigned long a, unsigned long b)< / div > < div class = "ttdoc" > Compute Greatest Common Divisor (GCD) of two numbers using Euclids algorithm.< / div > < div class = "ttdef" > < b > Definition:< / b > sol3.c:18< / div > < / div >
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< / div > <!-- fragment --> < div class = "dynheader" >
Here is the call graph for this function:< / div >
< div class = "dyncontent" >
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< div class = "center" > < iframe scrolling = "no" frameborder = "0" src = "../../d5/d7c/problem__5_2sol3_8c_ae9606f1867e9921867d6572f51377b4c_cgraph.svg" width = "144" height = "36" > < p > < b > This browser is not able to show SVG: try Firefox, Chrome, Safari, or Opera instead.< / b > < / p > < / iframe >
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< / div >
< / div >
< / div >
< / div >
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< a id = "a840291bc02cba5474a4cb46a9b9566fe" name = "a840291bc02cba5474a4cb46a9b9566fe" > < / a >
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< h2 class = "memtitle" > < span class = "permalink" > < a href = "#a840291bc02cba5474a4cb46a9b9566fe" > ◆   < / a > < / span > main()< / h2 >
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< div class = "memitem" >
< div class = "memproto" >
< table class = "memname" >
< tr >
< td class = "memname" > int main < / td >
< td > (< / td >
< td class = "paramtype" > void  < / td >
< td class = "paramname" > < / td > < td > )< / td >
< td > < / td >
< / tr >
< / table >
< / div > < div class = "memdoc" >
< p > Main function. < / p >
< dl class = "section return" > < dt > Returns< / dt > < dd > 0 on exit < / dd > < / dl >
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< div class = "fragment" > < div class = "line" > < span class = "lineno" > 51< / span > {< / div >
< div class = "line" > < span class = "lineno" > 52< / span > < span class = "keywordtype" > unsigned< / span > < span class = "keywordtype" > long< / span > ans = 1;< / div >
< div class = "line" > < span class = "lineno" > 53< / span > < span class = "keywordtype" > unsigned< / span > < span class = "keywordtype" > long< / span > i;< / div >
< div class = "line" > < span class = "lineno" > 54< / span > < span class = "keywordflow" > for< / span > (i = 1; i < = 20; i++)< / div >
< div class = "line" > < span class = "lineno" > 55< / span > {< / div >
< div class = "line" > < span class = "lineno" > 56< / span > ans = < a class = "code hl_function" href = "../../d5/d7c/problem__5_2sol3_8c.html#ae9606f1867e9921867d6572f51377b4c" > lcm< / a > (ans, i);< / div >
< div class = "line" > < span class = "lineno" > 57< / span > }< / div >
< div class = "line" > < span class = "lineno" > 58< / span > printf(< span class = "stringliteral" > " %lu\n" < / span > , ans);< / div >
< div class = "line" > < span class = "lineno" > 59< / span > < span class = "keywordflow" > return< / span > 0;< / div >
< div class = "line" > < span class = "lineno" > 60< / span > }< / div >
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< div class = "ttc" id = "aproblem__5_2sol3_8c_html_ae9606f1867e9921867d6572f51377b4c" > < div class = "ttname" > < a href = "../../d5/d7c/problem__5_2sol3_8c.html#ae9606f1867e9921867d6572f51377b4c" > lcm< / a > < / div > < div class = "ttdeci" > unsigned long lcm(unsigned long a, unsigned long b)< / div > < div class = "ttdoc" > Compute Least Common Multiple (LCM) of two numbers.< / div > < div class = "ttdef" > < b > Definition:< / b > sol3.c:41< / div > < / div >
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< / div > <!-- fragment --> < div class = "dynheader" >
Here is the call graph for this function:< / div >
< div class = "dyncontent" >
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< / div >
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