uva10976
来源:互联网 发布:转录组数据上传geo 编辑:程序博客网 时间:2024/06/13 12:26
这个,枚举到2n就可以了,其实还有一些小技巧,自己看吧
#include<cstdio>#include<algorithm>#include<cstring>#include<cmath>using namespace std;void cal(double k){ int n = 0; for(double i = k + 1 ; i <= k * 2 ; i++) if(k*i/(k-i) == floor(k*i/(k-i))){ n++; } printf("%d\n",n); for(double i = k + 1 ; i <= k * 2 ; i++){ if(k*i/(k-i) == floor(k*i/(k-i))){ printf("1/%.0lf = 1/%.0lf + 1/%.0lf\n",k,k*i/(i-k),i); } }}int main(){ double k; while(~scanf("%lf",&k)){ cal(k); } return 0;}
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