Compilare: main.cpp: In function 'bool isValid(int)': main.cpp:32:17: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 32 | if(s.size() > r) | ~~~~~~~~~^~~ main.cpp:36:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for(int i=0; i<s.size(); i++) | ~^~~~~~~~~ main.cpp:41:29: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 41 | if(s.size() - p == r) | ~~~~~~~~~~~~~^~~~ main.cpp: In function 'int main()': main.cpp:80:11: warning: 'sol' may be used uninitialized in this function [-Wmaybe-uninitialized] 80 | cout<<sol; | ^~~