Compilare: main.cpp: In function 'void testcase()': main.cpp:41:22: 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] 41 | for (ll i = 1; i < v.size(); ++i) | ~~^~~~~~~~~~ main.cpp:45:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | for (int j = 0; j < v.size(); ++j) { | ~~^~~~~~~~~~