Compilare: main.cpp: In function 'void dfs(int)': main.cpp:27:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[x].size();i++) ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:76:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (k=1;k<ctc.size();k++) ~^~~~~~~~~~~ main.cpp:79:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<ctc[k].size() && ok==0;i++) ~^~~~~~~~~~~~~~ main.cpp:82:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<ctc[0].size() && ok==0;j++) ~^~~~~~~~~~~~~~ main.cpp:104:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<sol.size();i++) ~^~~~~~~~~~~