Compilare: main.cpp: In function 'void calc(long long int, long long int, long long int, long long int, long long int)': main.cpp:18:24: 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] 18 | for (int i = st; i < dv.size(); i++) | ~~^~~~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:43:27: 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] 43 | for (int len = 1; len <= dv.size(); len++) { | ~~~~^~~~~~~~~~~~ main.cpp:44:27: 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] 44 | for (int i = 0; i < dv.size(); i++) | ~~^~~~~~~~~~~ main.cpp:30:9: warning: unused variable 'cop' [-Wunused-variable] 30 | int cop = n; | ^~~