Compilare: main.cpp: In function 'void dfs1(int)': main.cpp:21:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[nod].size(); i++){ ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void dfs2(int)': main.cpp:48:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ii = 0; ii < w[nod].size(); ii++){ ~~~^~~~~~~~~~~~~~~ main.cpp:50:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v[x].size(); i++){ ~~^~~~~~~~~~~~~ main.cpp:58:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ii = 0; ii < w[nod].size(); ii++){ ~~~^~~~~~~~~~~~~~~ main.cpp:60:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v[x].size(); i++){ ~~^~~~~~~~~~~~~ main.cpp: In function 'void solve(int)': main.cpp:70:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < w[nod].size(); i++){ ~~^~~~~~~~~~~~~~~ main.cpp:92:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v[nod].size(); i++){ ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:121:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < w[i].size(); j++){ ~~^~~~~~~~~~~~~ main.cpp:123:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(jj = 0; jj < v[nod].size(); jj++){ ~~~^~~~~~~~~~~~~~~