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#include <iostream> using namespace std; int main() { int n, m; cin >> n >> m; int mat[n][m]; for(int i = 0; i < n; i++) { for(int j = 0; j < m; j++) { cin >> mat[i][j]; } } for(int i = 0; i < n / 2; i++) { int zbir_gorna = 0; for(int j = 0; j < m; j++) { zbir_gorna += mat[i][j]; } int zbir_dolna = 0; for(int j = 0; j < m; j++) { zbir_dolna += mat[n - 1 - i][j]; } if(zbir_gorna > zbir_dolna) { for(int j = 0; j < m; j++) { swap(mat[n - 1 - i][j], mat[i][j]); } } } return 0; }
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