Compilare: user.cpp: In function ‘bool cmp(int)’: user.cpp:20:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Curr.size() && i < C.size(); i++, it = next(it), it2 = next(it2)) ^ user.cpp:20:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Curr.size() && i < C.size(); i++, it = next(it), it2 = next(it2)) ^ user.cpp: In function ‘void precalcCurr(int)’: user.cpp:36:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp: In function ‘bool cmp2(int)’: user.cpp:54:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < C.size() && i < Ans.size(); i++, it = next(it), it2 = next(it2)) ^ user.cpp:54:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < C.size() && i < Ans.size(); i++, it = next(it), it2 = next(it2)) ^ user.cpp: In function ‘void DFS(int, int)’: user.cpp:84:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp:83:9: warning: variable ‘cnt’ set but not used [-Wunused-but-set-variable] int cnt = 0; ^ user.cpp: In function ‘void DFS2(int, int, char)’: user.cpp:101:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp:113:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp:135:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:170:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Ans.size(); i++) ^