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Submission #936351

# Submission time Handle Problem Language Result Execution time Memory
936351 2024-03-01T16:52:19 Z VMaksimoski008 Fancy Fence (CEOI20_fancyfence) C++14
45 / 100
 1000 ms 1992 KB 
#include <bits/stdc++.h>

#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define int long long

using namespace std;

using ll = long long;
using ull = unsigned long long;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

const int mod = 1e9 + 7;
const int inv = 500000004;
const int LOG = 20;
const int maxn = 1e5 + 5;
const double eps = 1e-9;

int32_t main() {
    int n;
    cin >> n;
    set<int> diff;

    vector<int> h(n), w(n);
    for(int &x : h) cin >> x, diff.insert(x);
    for(int &x : w) cin >> x;

    auto f = [&](ll a, ll b) {
        ll p1 = 1ll * a * (a + 1) % mod * inv % mod;
        ll p2 = 1ll * b * (b + 1) % mod * inv % mod;
        return (p1 * p2) % mod;
    };

    if(diff.size() == 1) {
        ll W = 0;
        for(int &x : w) W += x, W %= mod;
        cout << f(W, h[0]) << '\n';
        return 0;
    }

    ll ans = 0;

    for(int i=0; i<n; i++) {
        ll W = w[i];
        ll H = h[i];
        for(int j=i+1; j<n; j++) {
            W += w[j];
            W %= mod;
            H = min(H, 1ll * h[j]);
            ll res = (f(W, H) - f(H, (W-w[i]+mod)%mod) + mod - f(H, (W-w[j]+mod)%mod) + mod + f(H, (W-w[i]-w[j]+2*mod)%mod)) % mod;
            ans += res;
            ans %= mod;
        }
    }

    for(int i=0; i<n; i++) {
        ans += f(h[i], w[i]);
        ans %= mod;
    }

    cout << ans << '\n';
    return 0;
}

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 15 ms 500 KB Output is correct

Subtask #2
12.0 / 12.0

# 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 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

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 19 ms 348 KB Output is correct
3 Execution timed out 1085 ms 1728 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 8 ms 348 KB Output is correct
3 Correct 28 ms 1116 KB Output is correct
4 Correct 61 ms 1992 KB Output is correct
5 Correct 56 ms 1992 KB Output is correct
6 Correct 0 ms 348 KB Output is correct

Subtask #5
0 / 15.0

# 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 6 ms 592 KB Output is correct
4 Correct 28 ms 1116 KB Output is correct
5 Correct 69 ms 1884 KB Output is correct
6 Correct 59 ms 1884 KB Output is correct
7 Correct 20 ms 348 KB Output is correct
8 Execution timed out 1088 ms 1220 KB Time limit exceeded
9 Halted 0 ms 0 KB -

Subtask #6
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 15 ms 492 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 15 ms 460 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 18 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 4 ms 452 KB Output is correct
13 Correct 15 ms 516 KB Output is correct
14 Correct 15 ms 348 KB Output is correct
15 Correct 15 ms 344 KB Output is correct
16 Correct 1 ms 600 KB Output is correct

Subtask #7
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 15 ms 500 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 16 ms 512 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 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 348 KB Output is correct
10 Correct 15 ms 456 KB Output is correct
11 Execution timed out 1046 ms 1632 KB Time limit exceeded
12 Halted 0 ms 0 KB -