차집합#include #include#include#includeusing namespace std;using ll = long long;int main() { ll n, m; cin >> n >> m; vectora(n); vectorb(m); for (ll i = 0;i >a[i]; } for (ll i = 0;i > b[i]; } sort(a.begin(), a.end()); sort(b.begin(), b.end()); vectordifference; set_difference(a.begin(), a.end(), b.begin(), b.end(), back_inserter(difference)); cout difference 벡터로 크기는 측정해야겠고 set_difference 함수로 저장도 해..