题解 | #蛇形矩阵#

#include<iostream>
#include<string>

using namespace std;
int main(){
    int n;
    while (cin>>n){
        int beg = 1;
        for (int i =1; i<=n; i++){
            cout<<beg;
            int tmp = beg;
            for (int j = i+1; j<=n; j++){
                tmp += j;
                cout<<" "<<tmp;
                
            }
            cout<<endl;
            beg+=i;
        }
    }
    return 0;
}