Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:46:3: error: ‘vector’ is not a member of ‘std’ std::vector<std::pair<Point, Point>> answer; ^~~ user.cpp:46:37: error: expected primary-expression before ‘>’ token std::vector<std::pair<Point, Point>> answer; ^~ user.cpp:46:40: error: ‘answer’ was not declared in this scope std::vector<std::pair<Point, Point>> answer; ^~~~~~ user.cpp:63:17: error: unable to deduce ‘auto&&’ from ‘answer’ for (auto i : answer) ^~~~~~ user.cpp:31:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("poarta.in", "r", stdin); ^ user.cpp:32:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("poarta.out", "w", stdout); ^ user.cpp:37:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &m, &k); ^ user.cpp:39:44: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &A.x, &A.y, &B.x, &B.y); ^ user.cpp:42:46: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &points[i].x, &points[i].y); ^