Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:36:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[x].size(); ++ i) ^ user.cpp: In function ‘void dfs(int, int)’: user.cpp:51:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[x].size(); ++ i) ^ user.cpp: In function ‘void solve()’: user.cpp:6:21: warning: comparisons like ‘X<=Y<=Z’ do not have their mathematical meaning [-Wparentheses] #define Max(x, y) x > y ? x : y ^ user.cpp:91:13: note: in expansion of macro ‘Max’ if (Max(s1, Max(s2, Max(s3, s4))) - Min(s1, Min(s2, Min(s3, s4))) < sol) ^ user.cpp:6:21: warning: comparisons like ‘X<=Y<=Z’ do not have their mathematical meaning [-Wparentheses] #define Max(x, y) x > y ? x : y ^ user.cpp:91:13: note: in expansion of macro ‘Max’ if (Max(s1, Max(s2, Max(s3, s4))) - Min(s1, Min(s2, Min(s3, s4))) < sol) ^ user.cpp:91:21: note: in expansion of macro ‘Max’ if (Max(s1, Max(s2, Max(s3, s4))) - Min(s1, Min(s2, Min(s3, s4))) < sol) ^ user.cpp:6:21: warning: comparisons like ‘X<=Y<=Z’ do not have their mathematical meaning [-Wparentheses] #define Max(x, y) x > y ? x : y ^ user.cpp:91:13: note: in expansion of macro ‘Max’ if (Max(s1, Max(s2, Max(s3, s4))) - Min(s1, Min(s2, Min(s3, s4))) < sol) ^ user.cpp:91:21: note: in expansion of macro ‘Max’ if (Max(s1, Max(s2, Max(s3, s4))) - Min(s1, Min(s2, Min(s3, s4))) < sol) ^ user.cpp:5:21: warning: comparisons like ‘X<=Y<=Z’ do not have their mathematical meaning [-Wparentheses] #define Min(x, y) x < y ? x : y ^ user.cpp:91:45: note: in expansion of macro ‘Min’ if (Max(s1, Max(s2, Max(s3, s4))) - Min(s1, Min(s2, Min(s3, s4))) < sol) ^ user.cpp:5:21: warning: comparisons like ‘X<=Y<=Z’ do not have their mathematical meaning [-Wparentheses] #define Min(x, y) x < y ? x : y ^ user.cpp:91:45: note: in expansion of macro ‘Min’ if (Max(s1, Max(s2, Max(s3, s4))) - Min(s1, Min(s2, Min(s3, s4))) < sol) ^ user.cpp:91:53: note: in expansion of macro ‘Min’ if (Max(s1, Max(s2, Max(s3, s4))) - Min(s1, Min(s2, Min(s3, s4))) < sol) ^ user.cpp:5:21: warning: comparisons like ‘X<=Y<=Z’ do not have their mathematical meaning [-Wparentheses] #define Min(x, y) x < y ? x : y