Compilare: main.cpp: In function 'int main()': main.cpp:65:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tort.in", "r", stdin); ^ main.cpp:66:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tort.out", "w", stdout); ^ main.cpp:67:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ main.cpp: In function 'void mul(int*, int*)': main.cpp:40:14: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized] c[0] = i + j - 2; ~~^~~