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好无聊的题目,还以为是在有理数域上分解。#include <iostream> #include <iomanip> using namespace std; int main() { int a,b,c,n; while(cin>>n) { if(n<2) { while(n>=0) { n--; cin>>a; } cout<<"YES"<<endl; } else if(n==2) { cin>>a>>b>>c; if(b*b>=4*a*c) cout<<"NO"<<endl; else cout<<"YES"<<endl; } else { while(n>=0) { n--; cin>>a; } cout<<"NO"<<endl; } } return 0; } Followed by:
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