Compilare: main.cpp: In function 'double calc(std::vector<Point>)': main.cpp:31:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for (int i = 0; i < v.size() / 2; ++i) | ~~^~~~~~~~~~~~~~ main.cpp:35:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | for (int i = v.size() / 2; i < v.size(); ++i) | ~~^~~~~~~~~~ main.cpp:39:41: warning: right operand of comma operator is a reference, not call, to function 'cmp_y' [-Waddress] 39 | sort(b.begin(), b.end(), cmp_y), cmp_y; | ^ main.cpp:39:41: warning: right operand of comma operator has no effect [-Wunused-value] main.cpp:44:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | while (dr < b.size() && b[dr].y <= a[dr].y + l) | ~~~^~~~~~~~~~ main.cpp:46:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | while (st < b.size() && a[st].y < a[dr].y - l) | ~~~^~~~~~~~~~ main.cpp:48:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Point>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | if (st == b.size()) | ~~~^~~~~~~~~~~