Compilare: main.cpp: In function 'void dfs2(int, std::vector<int>&)': main.cpp:24:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<edge[node].size(); i++){ ~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'void dfs1(int)': main.cpp:34:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<edge[node].size(); i++){ ~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'void calculate(int)': main.cpp:53:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<edge[c].size(); i++){ ~^~~~~~~~~~~~~~~ main.cpp:59:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<comp.size(); i++) ~^~~~~~~~~~~~ main.cpp: In function 'void solve(int)': main.cpp:67:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<edge[i].size(); j++){ ~^~~~~~~~~~~~~~~ main.cpp:72:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<comp.size(); i++){ ~^~~~~~~~~~~~ main.cpp:74:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<comp.size(); j++) ~^~~~~~~~~~~~ main.cpp:81:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<comp.size(); i++) ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:113:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<comp.size(); i++){ ~^~~~~~~~~~~~ main.cpp:114:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<comp[i].size(); j++) ~^~~~~~~~~~~~~~~