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我的代码我考虑的是b,c其中一个肯定不大于2*a,b和c相差越少越好,所以从2*a开始找能整除的,找到就是相差差最少的,也就是和最小的 #include <stdio.h> #include <cmath> int main() { __int64 a,b,c; while(scanf("%I64d",&a)!=EOF) { b=2*a; while((a*b+1)%(b-a)!=0) b--; c=(a*b+1)/(b-a); c=b+c; printf("%I64d\n",c); } return 0; } Followed by: Post your reply here: |
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