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Submission #447882

# Submission time Handle Problem Language Result Execution time Memory
447882 2021-07-28T00:00:29 Z flappybird Fancy Fence (CEOI20_fancyfence) C++14
100 / 100
 154 ms 13916 KB 
#include <bits/stdc++.h>
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("avx,avx2,fma")
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pll;
#define MAX 101010
#define MOD 1000000007
#define ln '\n'
ll H[MAX], W[MAX];
ll sw[MAX];
ll ans = 0;
ll N;
struct segtree {
	ll N, s;
	vector<pll> tree;
	vector<ll> l, r;
	void init(ll x = 1) {
		if (x >= s) {
			l[x] = r[x] = x - s + 1;
			if (x - s + 1 > N) tree[x] = { INT32_MAX, l[x] };
			tree[x].second = l[x];
			return;
		}
		init(x * 2);
		init(x * 2 + 1);
		l[x] = l[x * 2];
		r[x] = r[x * 2 + 1];
		tree[x] = min(tree[x * 2], tree[x * 2 + 1]);
	}
	segtree(ll n) {
		N = n;
		s = 1LL << (ll)ceil(log2(N));
		tree.resize(2 * s + 1);
		l.resize(2 * s + 1);
		r.resize(2 * s + 1);
	}
	segtree() {}
	pll query(ll low, ll high, ll loc = 1) {
		if (l[loc] == low && r[loc] == high) return tree[loc];
		if (r[loc * 2] >= high) return query(low, high, loc * 2);
		if (l[loc * 2 + 1] <= low) return query(low, high, loc * 2 + 1);
		return min(query(low, r[loc * 2], loc * 2), query(l[loc * 2 + 1], high, loc * 2 + 1));
	}
};
segtree seg;
void get(ll l, ll r) {
	if (l > r) return;
	ll res = seg.query(l, r).second;
	ll a = sw[r] - sw[l - 1];
	a %= MOD;
	ll b = H[res];
	b %= MOD;
	ll ls, rs;
	ls = sw[res] - sw[l - 1] - W[res];
	ls %= MOD;
	rs = sw[r] - sw[res];
	rs %= MOD;
	ll mem = a * (a + 1);
	mem %= MOD;
	mem -= ls * (ls + 1);
	mem %= MOD;
	mem -= rs * (rs + 1);
	mem %= MOD;
	mem *= b;
	mem %= MOD;
	mem *= (b + 1);
	mem %= MOD;
	while (mem % 4) mem += MOD;
	mem /= 4;
	ans += mem;
	ans %= MOD;
	get(l, res - 1);
	get(res + 1, r);
}
signed main() {
	ll N;
	cin >> N;
	ll i;
	seg = segtree(N);
	for (i = 1; i <= N; i++) cin >> H[i];
	for (i = 1; i <= N; i++) cin >> W[i], sw[i] = sw[i - 1] + W[i];
	for (i = 1; i <= N; i++) seg.tree[i + seg.s - 1] = { H[i], i };
	seg.init();
	get(1, N);
	ans %= MOD;
	if (ans < 0) ans += MOD;
	cout << ans << ln;
}

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 332 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 48 ms 5528 KB Output is correct
4 Correct 107 ms 10804 KB Output is correct
5 Correct 102 ms 10752 KB Output is correct
6 Correct 94 ms 10868 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 332 KB Output is correct
2 Correct 14 ms 1520 KB Output is correct
3 Correct 69 ms 5576 KB Output is correct
4 Correct 134 ms 10864 KB Output is correct
5 Correct 136 ms 10864 KB Output is correct
6 Correct 0 ms 204 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 2 ms 332 KB Output is correct
3 Correct 13 ms 1484 KB Output is correct
4 Correct 69 ms 5696 KB Output is correct
5 Correct 144 ms 10864 KB Output is correct
6 Correct 143 ms 10860 KB Output is correct
7 Correct 2 ms 332 KB Output is correct
8 Correct 13 ms 1560 KB Output is correct
9 Correct 68 ms 5572 KB Output is correct
10 Correct 130 ms 10948 KB Output is correct
11 Correct 133 ms 10788 KB Output is correct
12 Correct 1 ms 204 KB Output is correct

Subtask #6
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 2 ms 332 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 2 ms 332 KB Output is correct
10 Correct 2 ms 332 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 2 ms 332 KB Output is correct
14 Correct 2 ms 332 KB Output is correct
15 Correct 2 ms 332 KB Output is correct
16 Correct 0 ms 204 KB Output is correct

Subtask #7
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 2 ms 332 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 54 ms 5504 KB Output is correct
12 Correct 115 ms 10904 KB Output is correct
13 Correct 101 ms 10808 KB Output is correct
14 Correct 95 ms 10828 KB Output is correct
15 Correct 2 ms 332 KB Output is correct
16 Correct 14 ms 1544 KB Output is correct
17 Correct 66 ms 5504 KB Output is correct
18 Correct 135 ms 10864 KB Output is correct
19 Correct 154 ms 10824 KB Output is correct
20 Correct 2 ms 332 KB Output is correct
21 Correct 14 ms 1484 KB Output is correct
22 Correct 67 ms 5592 KB Output is correct
23 Correct 129 ms 10820 KB Output is correct
24 Correct 135 ms 10856 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 2 ms 332 KB Output is correct
28 Correct 1 ms 332 KB Output is correct
29 Correct 2 ms 332 KB Output is correct
30 Correct 12 ms 1484 KB Output is correct
31 Correct 12 ms 1528 KB Output is correct
32 Correct 56 ms 5544 KB Output is correct
33 Correct 59 ms 5588 KB Output is correct
34 Correct 110 ms 10820 KB Output is correct
35 Correct 110 ms 10948 KB Output is correct
36 Correct 138 ms 10816 KB Output is correct
37 Correct 144 ms 10812 KB Output is correct
38 Correct 1 ms 204 KB Output is correct
39 Correct 121 ms 10820 KB Output is correct
40 Correct 124 ms 10840 KB Output is correct
41 Correct 132 ms 11512 KB Output is correct
42 Correct 130 ms 13916 KB Output is correct