Compilare: user.cpp: In function ‘int main()’: user.cpp:70:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d\n", &n, &m); ^ user.cpp:74:31: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(matr[i], m + 2, fin); ^ user.cpp:85:40: warning: array subscript is below array bounds [-Warray-bounds] fprintf(fout, "%lld", (long long)cuts(n, expand - 1) * cuts(m, expand2 - 1)); ^ user.cpp:85:62: warning: array subscript is below array bounds [-Warray-bounds] fprintf(fout, "%lld", (long long)cuts(n, expand - 1) * cuts(m, expand2 - 1)); ^