Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:27:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < graph[node].size ( ); i++ ){ ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void find_st_dr(int)': main.cpp:39:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int j = 0; j < graph[node].size ( ); j++ ) ~~^~~~~~~~~~~~~~~~~~~~~~