Compilare: user.cpp: In function ‘void bfs()’: user.cpp:38:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int h = 0 ; h < g[node].size() ; h++){ ~~^~~~~~~~~~~~~~~~ user.cpp: In function ‘bool pairup(int)’: user.cpp:49:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int h = 0 ; h < g[node].size() ;h++){ ~~^~~~~~~~~~~~~~~~ user.cpp: In function ‘void dfs(int, int)’: user.cpp:92:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int h = 0 ;h < gstart[node].size() ;h++) ~~^~~~~~~~~~~~~~~~~~~~~