Compilare: main.cpp: In function 'void citire()': main.cpp:20:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for(int j=0; j<s[x].size(); ++j) { | ~^~~~~~~~~~~~ main.cpp:29:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for(int j=0; j<s[y].size(); ++j) { | ~^~~~~~~~~~~~ main.cpp: In function 'void bfs(int)': main.cpp:50:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | for( int i=0; i<s[nou].size(); ++i ) { | ~^~~~~~~~~~~~~~