Compilare: main.cpp: In function 'void bfs(int)': main.cpp:24:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < edge[nod].size(); i++ ){ ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'bool bf()': main.cpp:56:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < gflow[nod].size(); i++ ){ ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:82:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < edge[dest].size(); i++ ) { ~~^~~~~~~~~~~~~~~~~~~