[GESP2409二级] 小杨的N字矩阵

#include <bits/stdc++.h>
using namespace std;
int main(){
    int n;
    cin>>n;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=n;j++){
            if(j==1||j==n||i==j) cout<<"+";
            else cout<<"-";
        }
        cout<<endl;
    }
    return 0;
}