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#include
#include
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]; } } int niza[n * m]; int k = 0; for(int i = 0; i < n; i++) { for(int j = 0; j < m; j++) { int najmal_element = 2000000000; if(i + 1 < n) { // postoi dolniot sosed if(najmal_element > mat[i + 1][j]) { najmal_element = mat[i + 1][j]; } } if(i - 1 >= 0) { // postoi gorniot sosed if(najmal_element > mat[i - 1][j]) { najmal_element = mat[i - 1][j]; } } if(j + 1 < m) { // postoi desniot sosed if(najmal_element > mat[i][j + 1]) { najmal_element = mat[i][j + 1]; } } if(j - 1 >= 0) { // postoi leviot sosed if(najmal_element > mat[i][j - 1]) { najmal_element = mat[i][j - 1]; } } if(najmal_element > mat[i][j]) { niza[k] = najmal_element - mat[i][j]; k++; } } } if(k == 0) { cout << -1 << endl; } else { sort(niza, niza + k); for(int i = k - 1; i >= 0; i--) { cout << niza[i] << " "; } } return 0; }
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