Compilare: user.cpp: In function ‘int main()’: user.cpp:93:51: 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:94:51: 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:75:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d\n", &n); ^ user.cpp:82:24: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(s, SMAX, f); ^ user.cpp:121:19: warning: ‘mj’ may be used uninitialized in this function [-Wmaybe-uninitialized] print_sol(mi,mj); ^ user.cpp:121:19: warning: ‘mi’ may be used uninitialized in this function [-Wmaybe-uninitialized]