Compilare: user.cpp: In function ‘void solve_bucket()’: user.cpp:55:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (pos != Events.size()) { ^ user.cpp: In function ‘int main()’: user.cpp:126:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (pos != Events.size()) { ^ user.cpp:86:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("kinetic.in","r",stdin); ^ user.cpp:87:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("kinetic.out","w",stdout); ^ user.cpp:89:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:91:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf%lf", &b[i], &a[i]); ^ user.cpp:93:48: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf%lf%lf", &x[i], &y[i], &t[i]); ^