Compilare: user.cpp: In function ‘int get_hash(int, int)’: user.cpp:24:69: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Hash[(value * 1LL * abs( rate )) % MOD].size(); i ++ ) { ^ user.cpp: In function ‘void add_hash(int, int, int)’: user.cpp:34:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Hash[loc].size(); i ++ ) { ^ user.cpp: In function ‘int main()’: user.cpp:47:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "progr2.in" , "r", stdin ); ^ user.cpp:48:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "progr2.out", "w", stdout ); ^ user.cpp:50:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d", &T ); ^ user.cpp:52:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d", &N ); ^ user.cpp:55:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d", &V[i] ); ^