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2 1 11 3
0.50 0.09
#include <iostream> #include <stdio.h> #include <iomanip> using namespace std; int main() { int n,m; while(scanf("%d%d",&n,&m)!=EOF) { cout<<setiosflags(ios::fixed)<<setprecision(2)<<1.0/n<<endl; } return 0; }
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原文地址:http://blog.csdn.net/liyingjie01/article/details/51347400