Compilare: main.cpp: In function 'void dfs2(int)': main.cpp:25:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < tr[nod].size(); ++j) ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:66:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < cc[i].size(); j += 2) ~~^~~~~~~~~~~~~~ main.cpp:70:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 1; j < cc[i].size(); j += 2) ~~^~~~~~~~~~~~~~ main.cpp:74:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = position; j < cc[i].size(); j += 2) ~~^~~~~~~~~~~~~~ main.cpp:83:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < cc[i].size(); j += 2) ~~^~~~~~~~~~~~~~ main.cpp:87:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int start = 2; start < cc[i].size(); start += 2) ~~~~~~^~~~~~~~~~~~~~ main.cpp:91:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(lst >= cc[i].size()) ~~~~^~~~~~~~~~~~~~~ main.cpp:99:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 1; j < cc[i].size(); j += 2) ~~^~~~~~~~~~~~~~ main.cpp:104:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int start = 3; start < cc[i].size(); start += 2) ~~~~~~^~~~~~~~~~~~~~ main.cpp:108:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(lst >= cc[i].size()) ~~~~^~~~~~~~~~~~~~~ main.cpp:114:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 1; j <= cc[i].size() / 2 + 1; ++j) ~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:118:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(position >= cc[i].size()) ~~~~~~~~~^~~~~~~~~~~~~~~ main.cpp:147:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < cc[i].size(); ++j) ~~^~~~~~~~~~~~~~