Compilare: main.cpp: In function 'int merge_count(std::vector<int>&, std::vector<int>&, std::vector<int>&)': main.cpp:13:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | while (i < a.size() && j < b.size()) | ~~^~~~~~~~~~ main.cpp:13:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | while (i < a.size() && j < b.size()) | ~~^~~~~~~~~~ main.cpp:29:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | while (i < a.size()) | ~~^~~~~~~~~~ main.cpp:31:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | while (j < b.size()) | ~~^~~~~~~~~~ main.cpp: In function 'int solve(std::vector<int>&, int, int)': main.cpp:54:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | for (int i = 0; i < merged.size(); i++) | ~~^~~~~~~~~~~~~~~