Compilare: user.cpp: In function ‘pereche& find(int)’: user.cpp:32:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ( i < h[s & MOD].size() && h[s & MOD][i].s != s ) ^ user.cpp:35:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( i < h[s & MOD].size() ) ^ user.cpp: In function ‘int main()’: user.cpp:49:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &n, &S ); ^ user.cpp:52:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &v[i] ); ^