30.电梯测试

C
复制
1#include <iostream>
2using namespace std;
3int main(){
4  int n;
5  cin>>n;
6  if(n>1000){
7    cout<<"no";
8  }else if(n==1000){
9    cout<<"ok";
10  }else{
11    cout<<"safe";
12  }
13}
14