Compilare: main.cpp: In function 'void dfs(long long int, long long int)': main.cpp:30:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | while(st[nod]<stk.size()&&scst[nod]>c) | ~~~~~~~^~~~~~~~~~~ main.cpp:38:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | while(st[nod]<stk.size()&&s[nod]<0) | ~~~~~~~^~~~~~~~~~~