注意向上取整

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    char m;
    cin>>n>>m;

    string str = "";
    for(int j=1;j<=n;j++) str+=m;

    int id = (n+1)/2;//向上取整 

    for(int i=1;i<=id;i++){
        cout<<str<<endl;
    }

    return 0;
}