x-hechengye 2022-08-07 15:24:09 9 返回题目
#include <bits/stdc++.h> using namespace std; int n; int main() { cin >> n; for (int i = 1; i <= n; i++) { for (int j = 1; j <= i; j++) { cout << j << ' '; } cout << endl; } return 0; }