Compilare: user.cpp: In function ‘int main()’: user.cpp:83:51: warning: operation on ‘M[(n + 1)][i]’ may be undefined [-Wsequence-point] M[0][i] = M[n+1][i] = M[i][0] = M[n+1][i] = -1; ^ user.cpp:84:51: warning: operation on ‘D[(n + 1)][i]’ may be undefined [-Wsequence-point] D[0][i] = D[n+1][i] = D[i][0] = D[n+1][i] = -1; ^ user.cpp:74:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &n); ^ user.cpp:78:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &M[i][j]); ^ user.cpp:111:19: warning: ‘mj’ may be used uninitialized in this function [-Wmaybe-uninitialized] print_sol(mi,mj); ^ user.cpp:111:19: warning: ‘mi’ may be used uninitialized in this function [-Wmaybe-uninitialized]