1 #include <iostream>
 2 #include <vector>
 3 using namespace std;
 4 
 5 int main()
 6 {
 7     int n;
 8     while(cin >> n) {
 9         vector<vector<int>> matrix(n, vector<int>(n));
10         int count = 0;
11         for(int i = 0; i < n; ++i) {
 
12             for(int k = i, j = 0; j <= i; k--, j++) {
13                 count++;
14                 matrix[k][j] = count;
15             }
16         }
17 
18         for(int i = 0; i < n; ++i) {
19             for(int j = 0; j < n; ++j) {
20                 if(matrix[i][j]) cout << matrix[i][j] << "
 
 ";
21                 else cout << " ";
22             }
23             cout << endl;
24         }
25     }
26     return 0;
27 }

華為筆試題--蛇形矩陣