题解 | 蛇形矩阵

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

int main() {//---------找规律
  int n;
  cin >> n;
  int a = 1, pro = 1;
  for (int i = 1; i <= n; i++){
    cout << pro << ' ';
    for (int j = i + 1; j <= n; j++){
      pro += j;
      cout << pro << ' ';
    }
    cout << endl;
    a += i;
    pro = a;
  }
}
// 64 位输出请用 printf("%lld")