Compilare: user.cpp: In function ‘int search(long long int, int)’: user.cpp:13:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < v[k].size(); i++ ){ ^ user.cpp: In function ‘int main()’: user.cpp:37:32: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 3 has type ‘int’ [-Wformat=] fprintf( fout, "%lld", sol ); ^ user.cpp:25:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%lld", &x ); ^ user.cpp:29:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &m ); ^ user.cpp:33:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%lld", &x ); ^