art.cpp:6:9: warning: ISO C++11 requires whitespace after the macro name
6 | #define fast_io; ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
| ^~~~~~~
art.cpp:10:14: warning: overflow in conversion from 'double' to 'll' {aka 'int'} changes value from '8.0e+18' to '2147483647' [-Woverflow]
10 | const ll INF=8e18;
| ^~~~
interface.cpp: In function 'int publish(std::vector<int>)':
interface.cpp:20:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
20 | if(v.size() != N) {
| ~~~~~~~~~^~~~
interface.cpp: In function 'void answer(std::vector<int>)':
interface.cpp:36:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
36 | if(v.size() != N) {
| ~~~~~~~~~^~~~