Compilare: main.cpp: In function 'int main()': main.cpp:52:33: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<str>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | if (st + (1LL << e) < sume.size() && sume[st + (1LL << e)].s < x) | ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~ main.cpp:59:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<str>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 59 | if (st < sume.size() && sume[st].s == x) | ~~~^~~~~~~~~~~~~