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Submission #963008

# Submission time Handle Problem Language Result Execution time Memory
963008 2024-04-14T10:57:22 Z zwezdinv Fancy Fence (CEOI20_fancyfence) C++17
100 / 100
 33 ms 4320 KB 
#include<bits/stdc++.h>
using namespace std;

using ll = long long;

int mod = 1e9 + 7;
int add(int a, int b) {
    return a + b >= mod ? a + b - mod : a + b;
}
int sub(int a, int b) {
    return a >= b ? a - b : a + mod - b;
}
int mul(int a, int b) {
    return 1ll * a * b % mod;
}

int main() {
    cin.tie(nullptr)->sync_with_stdio(false);

    int i2 = (mod + 1) / 2;
    auto sshit = [&](int x) -> int {
        return mul(mul(x, x + 1), i2);
    };

    int n;
    cin >> n;
    vector<pair<int, int>> st;
    vector<int> h(n), w(n);
    for (auto& i : h) cin >> i;
    for (auto& i : w) cin >> i;
    int sum = 0;
    int ans = 0;
    for (int i = 0; i < n; ++i) {
        int cnt = w[i];
        while (st.size() && st.back().first >= h[i]) {
            cnt = add(cnt, st.back().second);
            sum = sub(sum, mul(sshit(st.back().first), st.back().second));
            st.pop_back();
        }
        st.emplace_back(h[i], cnt);
        sum = add(sum, mul(sshit(h[i]), cnt));
        int cur = mul(sum, w[i]);
        cur = sub(cur, mul(sshit(h[i]), mul(w[i], w[i])));
        cur = add(cur, mul(sshit(w[i]), sshit(h[i])));
        ans = add(ans, cur);
    }
    cout << ans;
}

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 9 ms 1372 KB Output is correct
4 Correct 19 ms 2396 KB Output is correct
5 Correct 21 ms 2412 KB Output is correct
6 Correct 18 ms 2396 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 4 ms 348 KB Output is correct
3 Correct 13 ms 604 KB Output is correct
4 Correct 25 ms 1252 KB Output is correct
5 Correct 24 ms 1112 KB Output is correct
6 Correct 1 ms 348 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 3 ms 348 KB Output is correct
4 Correct 16 ms 860 KB Output is correct
5 Correct 28 ms 1228 KB Output is correct
6 Correct 28 ms 1116 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 3 ms 788 KB Output is correct
9 Correct 12 ms 2140 KB Output is correct
10 Correct 23 ms 4100 KB Output is correct
11 Correct 24 ms 4320 KB Output is correct
12 Correct 1 ms 348 KB Output is correct

Subtask #6
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 2 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 472 KB Output is correct
16 Correct 1 ms 504 KB Output is correct

Subtask #7
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 10 ms 1228 KB Output is correct
12 Correct 19 ms 2384 KB Output is correct
13 Correct 19 ms 2264 KB Output is correct
14 Correct 19 ms 2396 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 3 ms 600 KB Output is correct
17 Correct 13 ms 1624 KB Output is correct
18 Correct 27 ms 3180 KB Output is correct
19 Correct 28 ms 3300 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 3 ms 724 KB Output is correct
22 Correct 12 ms 2128 KB Output is correct
23 Correct 25 ms 4060 KB Output is correct
24 Correct 29 ms 4304 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 4 ms 604 KB Output is correct
31 Correct 3 ms 604 KB Output is correct
32 Correct 16 ms 1480 KB Output is correct
33 Correct 13 ms 1628 KB Output is correct
34 Correct 25 ms 2776 KB Output is correct
35 Correct 24 ms 2912 KB Output is correct
36 Correct 33 ms 2916 KB Output is correct
37 Correct 26 ms 3192 KB Output is correct
38 Correct 0 ms 356 KB Output is correct
39 Correct 28 ms 3028 KB Output is correct
40 Correct 27 ms 3160 KB Output is correct
41 Correct 26 ms 3164 KB Output is correct
42 Correct 26 ms 3940 KB Output is correct