Compilare: main.cpp: In function 'long long int solve2_bun()': main.cpp:76:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 76 | for(int i=0;i<poz.size()-1;++i) | ~^~~~~~~~~~~~~ main.cpp: In function 'long long int solve()': main.cpp:92:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 92 | for(int j=0;j<s.size();++j) | ~^~~~~~~~~ main.cpp: At global scope: main.cpp:102:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] 102 | main() | ^~~~