题解 | #蛇形矩阵#

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

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

蛇形遍历