Compilare: main.cpp: In function 'int cost_s(std::__cxx11::string)': main.cpp:26:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<c.size();i++){ ~^~~~~~~~~ main.cpp: In function 'int nr_E(std::__cxx11::string)': main.cpp:36:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<c.size();i++) if(c[i]=='E') rasp++; ~^~~~~~~~~ main.cpp: In function 'void dfs(int)': main.cpp:41:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[node].size();i++){ ~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:66:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<muchii.size();i++){ ~^~~~~~~~~~~~~~