zalmoxis.cpp: In function 'void f(int, int)':
zalmoxis.cpp:21:53: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
21 | }else if(First[x].empty() or First[x].back() + del > ans.size() + 1){
| ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
zalmoxis.cpp:24:33: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
24 | }else if(First[x].back() + del <= ans.size() + 1){
| ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
zalmoxis.cpp: At global scope:
zalmoxis.cpp:33:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
33 | main(){
| ^~~~
zalmoxis.cpp: In function 'int main()':
zalmoxis.cpp:56:19: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
56 | while(ans.size() < n + k){
| ~~~~~~~~~~~^~~~~~~
zalmoxis.cpp:60:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
60 | for(int i = 0;i < have.size(); i++){
| ~~^~~~~~~~~~~~~
zalmoxis.cpp:66:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
66 | for(int j = i + 1; j < have.size(); j++){
| ~~^~~~~~~~~~~~~
zalmoxis.cpp:75:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
75 | for(int i = 0;i < ans.size(); i++) cout << ans[i] << ' ';
| ~~^~~~~~~~~~~~