View Compilation Error

0_0_35461200_19973.cpp: In function 'long long int print_map(long long int)':
0_0_35461200_19973.cpp:27:37: error: 'struct cost' has no member named 'a'
                     s += it->second.a[i];
                                     ^
0_0_35461200_19973.cpp:27:39: error: 'i' was not declared in this scope
                     s += it->second.a[i];
                                       ^