Compilare: main.cpp: In function 'int main()': main.cpp:34:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(nr0(mij) >= p) ~~~~~~~~~^~~~ main.cpp:41:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(nr0(nr) != p) ~~~~~~~~^~~~ main.cpp:19:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("fact.in", "r", stdin); ^ main.cpp:20:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("fact.out", "w", stdout); ^ main.cpp:22:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &p); ^ main.cpp:9:13: warning: 'nr' may be used uninitialized in this function [-Wmaybe-uninitialized] while(x / p) ~~^~~ main.cpp:30:39: note: 'nr' was declared here int st = 1, dr = 1000000010, mij, nr; ^~