swaps.cpp: In function 'void solve(int, int)':
swaps.cpp:10:6: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
10 | rep(i,n)ans[i-1]=i;
| ^
swaps.cpp:6:37: note: in definition of macro 'rep'
6 | #define rep(i, a) for(register int i=1,i##end=a;i<=i##end;i++)
| ^
swaps.cpp:10:6: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
10 | rep(i,n)ans[i-1]=i;
| ^
swaps.cpp:6:41: note: in definition of macro 'rep'
6 | #define rep(i, a) for(register int i=1,i##end=a;i<=i##end;i++)
| ^
swaps.cpp:13:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
13 | for(int j=i%2;j+1<ans.size();j+=2) {
| ~~~^~~~~~~~~~~
swaps.cpp:19:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
19 | for(int j=0;j<A.size();j++)
| ~^~~~~~~~~