holding.cpp: In function 'void bt(long long int)':
holding.cpp:18:20: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
18 | if(v.size()!=r-l+1)
| ~~~~~~~~^~~~~~~
holding.cpp:23:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
23 | for(int i=0;i<v.size();i++)
| ~^~~~~~~~~
holding.cpp: At global scope:
holding.cpp:41:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
41 | main()
| ^~~~