#include <bits/stdc++.h>
using namespace std;
typedef complex<long long> point;
long long cross(point a, point b) {
return (conj(a) * b).imag();
}
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int n, m;
cin >> n >> m;
vector<point> a(n), b(m);
for (int i = 0; i < n; i++) {
int x;
cin >> x;
a[i] = point(i, x);
}
for (int i = 0; i < m; i++) {
int x;
cin >> x;
b[i] = point(i, x);
}
auto f = [](vector<point> a, bool is_a) -> vector<array<int, 4>> {
vector<point> hull;
for (point p : a) {
while (hull.size() >= 2 && cross(p - hull.end()[-2], p - hull.end()[-1]) <= 0) hull.pop_back();
hull.push_back(p);
}
vector<array<int, 4>> res;
point last(-1, -1);
for (point p : hull) {
if (last != point(-1, -1)) {
int length = p.real() - last.real();
int delta = p.imag() - last.imag();
int di = length, dj = 0;
if (!is_a) swap(di, dj);
res.push_back({length, delta, di, dj});
}
last = p;
}
return res;
};
vector<array<int, 4>> fa = f(a, true);
vector<array<int, 4>> fb = f(b, false);
vector<array<int, 4>> fab(fa.size() + fb.size());
merge(fa.begin(), fa.end(), fb.begin(), fb.end(), fab.begin(), [&](array<int, 4> x, array<int, 4> y) {
return 1LL * x[1] * y[0] < 1LL * y[1] * x[0];
});
int i = 0, j = 0;
long long answer = 0;
for (auto [length, delta, di, dj] : fab) {
answer += 1LL * di * b[j].imag() + 1LL * dj * a[i].imag();
i += di;
j += dj;
}
cout << answer << '\n';
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
1 ms |
420 KB |
Output is correct |
| 7 |
Correct |
1 ms |
348 KB |
Output is correct |
| 8 |
Correct |
1 ms |
348 KB |
Output is correct |
| 9 |
Correct |
1 ms |
432 KB |
Output is correct |
| 10 |
Correct |
1 ms |
348 KB |
Output is correct |
| 11 |
Correct |
1 ms |
348 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
1 ms |
604 KB |
Output is correct |
| 14 |
Correct |
0 ms |
512 KB |
Output is correct |
| 15 |
Correct |
1 ms |
348 KB |
Output is correct |
| 16 |
Correct |
1 ms |
348 KB |
Output is correct |
| 17 |
Correct |
1 ms |
348 KB |
Output is correct |
| 18 |
Correct |
1 ms |
344 KB |
Output is correct |
| 19 |
Correct |
0 ms |
348 KB |
Output is correct |
| 20 |
Correct |
0 ms |
344 KB |
Output is correct |
| 21 |
Correct |
1 ms |
344 KB |
Output is correct |
| 22 |
Correct |
1 ms |
344 KB |
Output is correct |
| 23 |
Correct |
1 ms |
348 KB |
Output is correct |
| 24 |
Correct |
0 ms |
348 KB |
Output is correct |
| 25 |
Correct |
1 ms |
348 KB |
Output is correct |
| 26 |
Correct |
0 ms |
348 KB |
Output is correct |
| 27 |
Correct |
0 ms |
348 KB |
Output is correct |
| 28 |
Correct |
1 ms |
348 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
1 ms |
348 KB |
Output is correct |
| 3 |
Correct |
1 ms |
348 KB |
Output is correct |
| 4 |
Correct |
6 ms |
3164 KB |
Output is correct |
| 5 |
Correct |
5 ms |
2904 KB |
Output is correct |
| 6 |
Correct |
3 ms |
1628 KB |
Output is correct |
| 7 |
Correct |
15 ms |
5760 KB |
Output is correct |
| 8 |
Correct |
14 ms |
5724 KB |
Output is correct |
| 9 |
Correct |
14 ms |
5848 KB |
Output is correct |
| 10 |
Correct |
15 ms |
5944 KB |
Output is correct |
| 11 |
Correct |
13 ms |
5724 KB |
Output is correct |
| 12 |
Correct |
14 ms |
5888 KB |
Output is correct |
| 13 |
Correct |
16 ms |
5892 KB |
Output is correct |
| 14 |
Correct |
13 ms |
5900 KB |
Output is correct |
| 15 |
Correct |
17 ms |
5980 KB |
Output is correct |
| 16 |
Correct |
0 ms |
348 KB |
Output is correct |
| 17 |
Correct |
0 ms |
348 KB |
Output is correct |
| 18 |
Correct |
0 ms |
348 KB |
Output is correct |
| 19 |
Correct |
0 ms |
356 KB |
Output is correct |
| 20 |
Correct |
0 ms |
348 KB |
Output is correct |
| 21 |
Correct |
0 ms |
460 KB |
Output is correct |
| 22 |
Correct |
0 ms |
460 KB |
Output is correct |
| 23 |
Correct |
0 ms |
452 KB |
Output is correct |
| 24 |
Correct |
1 ms |
348 KB |
Output is correct |
| 25 |
Correct |
0 ms |
348 KB |
Output is correct |
| 26 |
Correct |
0 ms |
348 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
1 ms |
420 KB |
Output is correct |
| 7 |
Correct |
1 ms |
348 KB |
Output is correct |
| 8 |
Correct |
1 ms |
348 KB |
Output is correct |
| 9 |
Correct |
1 ms |
432 KB |
Output is correct |
| 10 |
Correct |
1 ms |
348 KB |
Output is correct |
| 11 |
Correct |
1 ms |
348 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
1 ms |
604 KB |
Output is correct |
| 14 |
Correct |
0 ms |
512 KB |
Output is correct |
| 15 |
Correct |
1 ms |
348 KB |
Output is correct |
| 16 |
Correct |
1 ms |
348 KB |
Output is correct |
| 17 |
Correct |
1 ms |
348 KB |
Output is correct |
| 18 |
Correct |
1 ms |
344 KB |
Output is correct |
| 19 |
Correct |
0 ms |
348 KB |
Output is correct |
| 20 |
Correct |
0 ms |
344 KB |
Output is correct |
| 21 |
Correct |
1 ms |
344 KB |
Output is correct |
| 22 |
Correct |
1 ms |
344 KB |
Output is correct |
| 23 |
Correct |
1 ms |
348 KB |
Output is correct |
| 24 |
Correct |
0 ms |
348 KB |
Output is correct |
| 25 |
Correct |
1 ms |
348 KB |
Output is correct |
| 26 |
Correct |
0 ms |
348 KB |
Output is correct |
| 27 |
Correct |
0 ms |
348 KB |
Output is correct |
| 28 |
Correct |
1 ms |
348 KB |
Output is correct |
| 29 |
Correct |
0 ms |
348 KB |
Output is correct |
| 30 |
Correct |
1 ms |
348 KB |
Output is correct |
| 31 |
Correct |
1 ms |
348 KB |
Output is correct |
| 32 |
Correct |
6 ms |
3164 KB |
Output is correct |
| 33 |
Correct |
5 ms |
2904 KB |
Output is correct |
| 34 |
Correct |
3 ms |
1628 KB |
Output is correct |
| 35 |
Correct |
15 ms |
5760 KB |
Output is correct |
| 36 |
Correct |
14 ms |
5724 KB |
Output is correct |
| 37 |
Correct |
14 ms |
5848 KB |
Output is correct |
| 38 |
Correct |
15 ms |
5944 KB |
Output is correct |
| 39 |
Correct |
13 ms |
5724 KB |
Output is correct |
| 40 |
Correct |
14 ms |
5888 KB |
Output is correct |
| 41 |
Correct |
16 ms |
5892 KB |
Output is correct |
| 42 |
Correct |
13 ms |
5900 KB |
Output is correct |
| 43 |
Correct |
17 ms |
5980 KB |
Output is correct |
| 44 |
Correct |
0 ms |
348 KB |
Output is correct |
| 45 |
Correct |
0 ms |
348 KB |
Output is correct |
| 46 |
Correct |
0 ms |
348 KB |
Output is correct |
| 47 |
Correct |
0 ms |
356 KB |
Output is correct |
| 48 |
Correct |
0 ms |
348 KB |
Output is correct |
| 49 |
Correct |
0 ms |
460 KB |
Output is correct |
| 50 |
Correct |
0 ms |
460 KB |
Output is correct |
| 51 |
Correct |
0 ms |
452 KB |
Output is correct |
| 52 |
Correct |
1 ms |
348 KB |
Output is correct |
| 53 |
Correct |
0 ms |
348 KB |
Output is correct |
| 54 |
Correct |
0 ms |
348 KB |
Output is correct |
| 55 |
Correct |
11 ms |
3932 KB |
Output is correct |
| 56 |
Correct |
1 ms |
348 KB |
Output is correct |
| 57 |
Correct |
1 ms |
604 KB |
Output is correct |
| 58 |
Correct |
3 ms |
1372 KB |
Output is correct |
| 59 |
Correct |
22 ms |
6916 KB |
Output is correct |
| 60 |
Correct |
21 ms |
6900 KB |
Output is correct |
| 61 |
Correct |
22 ms |
7000 KB |
Output is correct |
| 62 |
Correct |
20 ms |
7012 KB |
Output is correct |
| 63 |
Correct |
21 ms |
10452 KB |
Output is correct |
| 64 |
Correct |
21 ms |
7016 KB |
Output is correct |
| 65 |
Correct |
23 ms |
6960 KB |
Output is correct |
| 66 |
Correct |
20 ms |
7044 KB |
Output is correct |
| 67 |
Correct |
19 ms |
7260 KB |
Output is correct |
