oj.uz

Submission #564848

# Submission time Handle Problem Language Result Execution time Memory
564848 2022-05-19T19:30:13 Z cheissmart Sightseeing in Kyoto (JOI22_kyoto) C++14
0 / 100
 1 ms 340 KB 
#include <bits/stdc++.h>
#define int ll
#define IO_OP ios::sync_with_stdio(0), cin.tie(0)
#define F first
#define S second
#define V vector
#define PB push_back
#define EB emplace_back
#define MP make_pair
#define SZ(v) int((v).size())
#define ALL(v) (v).begin(), (v).end()

using namespace std;

typedef long long ll;
typedef pair<int, int> pi;
typedef V<int> vi;

const int INF = 1e9 + 7;

bool check(int a, int b, int c, int d) { // a / b >= c / d ?
	assert(b > 0 && d > 0);
	return 1LL * a * d >= 1LL * b * c;
}

vi go(vi a) {
	vi h;
	int n = SZ(a);
	for(int i = 0; i < n; i++) {
		if(SZ(h) >= 2 && check(a[h[SZ(h) - 1]] - a[h[SZ(h) - 2]], h[SZ(h) - 1] - h[SZ(h) - 2], a[i] - a[h[SZ(h) - 1]], i - h[SZ(h) - 1]))
			h.pop_back();
		h.PB(i);
	}
	return h;
}

signed main()
{
	IO_OP;

	int n, m;
	cin >> n >> m;
	assert(n >= 2 && m >= 2);

	vi a(n), b(m);
	for(int i = 0; i < n; i++)
		cin >> a[i];
	for(int i = 0; i < m; i++)
		cin >> b[i];

	vi ha = go(a), hb = go(b);

	ll ans = 0;

	while(SZ(ha) >= 2 || SZ(hb) >= 2) {
		if(SZ(hb) == 1 || (SZ(ha) >= 2 && check(a[ha[SZ(ha) - 1]] - a[ha[SZ(ha) - 2]], ha[SZ(ha) - 1] - ha[SZ(ha) - 2], b[hb[SZ(hb) - 1]] - b[hb[SZ(hb) - 2]], hb[SZ(hb) - 1] - hb[SZ(hb) - 2]))) {
			ans += 1LL * (ha[SZ(ha) - 1] - ha[SZ(ha) - 2]) * b[hb.back()];
			ha.pop_back();
		} else {
			ans += 1LL * (hb[SZ(hb) - 1] - hb[SZ(hb) - 2]) * a[ha.back()];
			hb.pop_back();
		}
	}

	cout << ans << '\n';


}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Incorrect 1 ms 340 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Incorrect 1 ms 340 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Incorrect 1 ms 340 KB Output isn't correct
5 Halted 0 ms 0 KB -