Compilare: main.cpp: In function 'void solve()': main.cpp:35:40: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | while(!st.empty() && n - i - 1 >= (n - m) - st.size() && st.back() < s[i]) | ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:48:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | while(st[i] == '0' && i < st.size()) | ~~^~~~~~~~~~~ main.cpp:50:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | for(; i < st.size(); ++i) | ~~^~~~~~~~~~~