Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:20:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();++i) ^ user.cpp: In function ‘int main()’: user.cpp:54:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<p[1].size()&&ok;++i) ^ user.cpp:56:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<p[4].size()&&ok;++j) ^ user.cpp:58:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<p[5].size()&&ok;++j) ^ user.cpp:60:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<p[2].size()&&ok;++j) ^ user.cpp:63:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<p[2].size()&&ok;++i) ^ user.cpp:65:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<p[4].size()&&ok;++j) ^ user.cpp:67:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<p[6].size()&&ok;++j) ^ user.cpp:69:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<p[3].size()&&ok;++j) ^ user.cpp:72:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<p[3].size()&&ok;++i) ^ user.cpp:74:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<p[6].size()&&ok;++j) ^ user.cpp:76:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<p[5].size()&&ok;++j) ^ user.cpp:78:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<p[1].size()&&ok;++j) ^