Compilare: main.cpp: In function 'int main()': main.cpp:22:78: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 22 | while(!stiva.empty() && stiva.back() < str[i] && stiva.size() + left > m) | ~~~~~~~~~~~~~~~~~~~~^~~ main.cpp:24:25: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 24 | if(stiva.size() < m) | ~~~~~~~~~~~~~^~~