三位数的水仙花数重点是，while 处不可恒成立，acm超时于是用cin#include <iostream>using namespace std;int main(){ int a; while (cin>>a) { int b, c, d; if (a < 100 || a>999) { cout << "NO\n"; continue; } b = a % 10; c = a / 10 % 10; d = a / 100 % 10; if (b * b * b + c * c * c + d * d * d == a) cout << "YES"<<endl; else cout << "NO"<<endl; }}