标签:style blog http color os io for ar
题意:给出两个数n,m,求分母从1-m越来越接近n/m的序列
思路:从1-m枚举分母i,然后维护一个值,使序列越来越靠近n/m。分子j的话,j/i趋近于n/m时,可以得到(int)j=i*n/m+0.5。
代码:
#include <iostream> #include <cstdio> #include <cstring> #include <cmath> #include <algorithm> using namespace std; const int INF = 0x3f3f3f; int n, m; int main() { int t = 0; while (scanf("%d%d", &n, &m) != EOF) { if (t) printf("\n"); t = 1; double k = n / (m * 1.0), r = INF; for (int i = 1; i <= m; i++) { int j = i * k + 0.5; double temp = fabs(j / (i * 1.0) - k); if (temp < r) { r = temp; printf("%d/%d\n", j, i); } } } return 0; }
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标签:style blog http color os io for ar
原文地址:http://blog.csdn.net/u011345461/article/details/38616019