Compilare: main.cpp: In function 'int32_t main()': main.cpp:41:27: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | for (int i = 0; i < power.size() - 1; ++i) { | ~~^~~~~~~~~~~~~~~~~~ main.cpp:45:27: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | for (int i = 0; i < power.size(); ++i) { | ~~^~~~~~~~~~~~~~