Compilare: main.cpp: In function 'void read()': main.cpp:25:13: warning: unused variable 'cnt' [-Wunused-variable] 25 | int a,b,cnt=1; | ^~~ main.cpp: In function 'void solve()': main.cpp:72:18: 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] 72 | for(int i=1;i<path.size();i++) { | ~^~~~~~~~~~~~ main.cpp:81:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::vector<long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 81 | for(int i=0;i<res.size()-1;i++) { | ~^~~~~~~~~~~~~