Compilare: user.cpp: In function ‘void ctc(int)’: user.cpp:27:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < gr[nod].size(); i++){ ^ user.cpp: In function ‘void dfs(int)’: user.cpp:63:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < gr2[nod].size(); i++){ ^ user.cpp: In function ‘int main()’: user.cpp:82:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < gr[i].size(); j++){ ^ user.cpp:99:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0 ; j < gr2[i].size(); j++)intra[gr2[i][j]]++; ^