View Compilation Error

0_0_32407892_4042.cpp: In function 'long long int getf(long long int)':
0_0_32407892_4042.cpp:107:47: error: 'struct std::pair<const long long int, long long int>' has no member named 'se'
     if((it1=ff.find(n))!=ff.end())return it1->se;
                                               ^