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#include <iostream> void fill_mat(int* arr, int n) { int k = 0; for(int i = 0; i < n; i++) { if(i < (n/2+n%2)) arr[i*n+i] = arr[(n-1-i)*n+i] = ++k; else arr[i*n+i] = arr[(n-1-i)*n+i] = --k; } } int main(void) { const int N = 17; int mat[N][N] = {{0}}; fill_mat((int*)mat, N); for(int r = 0; r < N; r++) { for(int c = 0; c < N; c++) std::cout << mat[r][c] << " "; std::cout.put('\n'); } return 0; }
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