#include<cstdio> int main () { int t,n,k; scanf ("%d",&n); t=1; while (n>t) { n=n-t; t++; } printf("%d/%d",n,t+1-n); } 输入:7 输出:1/4 输入:20 输出:5/2 输入:50 输出:5/6 各位同学能否看一下?谢谢!