Compilare: main.cpp: In function 'void solve()': main.cpp:64:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 64 | for(int i = 0; i < fortresses.size(); ++i) | ~~^~~~~~~~~~~~~~~~~~~ main.cpp:84:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 84 | for(int i = 0; i < muchii[current].size(); ++i) | ~~^~~~~~~~~~~~~~~~~~~~~~~~