题解 | #蛇形矩阵#

#include <iostream>
#include <vector>
#include <iostream>
using namespace std;

int main() {
    int n = 0;
   cin >> n;
    vector<vector<int>> res(n+1,vector<int>(n+1));
    for(int i = 1 ; i <= n ; i++){
        for(int  j = i ; j <= n ;j++){
            res[i][j] = (j+1)*j/2 -i + 1;
            cout << res[i][j] << " ";}
        cout << " "  << endl;
    }
   
}
// 64 位输出请用 printf("%lld")