Compilare: main.cpp: In function 'int dfs(int, int)': main.cpp:26:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < vals[node].size(); i++) { ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:99:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[pos].size(); i++) { ~~^~~~~~~~~~~~~~~ main.cpp:115:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int ind = 0; ind < output.size(); ind++) ~~~~^~~~~~~~~~~~~~~