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Submission #623693

# Submission time Handle Problem Language Result Execution time Memory
623693 2022-08-06T09:45:25 Z Vladth11 Fancy Fence (CEOI20_fancyfence) C++14
100 / 100
 25 ms 5352 KB 
#include <bits/stdc++.h>
#define debug(x) cerr << #x << " " << x << "\n"
#define debugs(x) cerr << #x << " " << x << " "

using namespace std;
typedef long long ll;
typedef pair <ll, ll> pii;
typedef pair <long double, pii> muchie;

const ll NMAX = 100001;
const ll VMAX = 101;
const ll INF = (1LL << 60);
const ll MOD = 1000000007;
const ll BLOCK = 447;
const ll base = 117;
const ll nr_of_bits = 18;
const ll inv2 = 500000004;

pii stiva[NMAX];
ll vf;
ll scor = 0;
ll h[NMAX];
ll w[NMAX];

ll lgput(ll n, ll p){
    ll rez = 1;
    while(p){
        if(p % 2){
            rez = (1LL * rez * n) % MOD;
        }
        n = (1LL * n * n) % MOD;
        p /= 2;
    }
    return rez;
}

ll gauss(ll x){
    return 1LL * (1LL * x * (x + 1)) % MOD * inv2 % MOD;
}

ll cate(ll h, ll w){
    return (1LL * gauss(h) * gauss(w)) % MOD;
}

ll combined(ll h, ll w1, ll w2){
    return (1LL * (1LL * gauss(h) * w1) % MOD * w2) % MOD;
}

void add(ll &x, ll val){
    x += val;
    if(x >= MOD){
        x -= MOD;
    }
    if(x < 0){
        x += MOD;
    }
}

unordered_map <int, ll> mp;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    ll n, i;
    ll total = 0, scor = 0;
    cin >> n;
    for(i = 1; i <= n; i++) cin >> h[i];
    for(i = 1; i <= n; i++) cin >> w[i];
    for(i = 1; i <= n; i++){
        add(total, cate(h[i], w[i]));
        ll avem = w[i];
        while(vf && stiva[vf].first >= h[i]){
            add(total, combined(h[i], stiva[vf].second, w[i]));
            add(scor, -(gauss(stiva[vf].first) * stiva[vf].second) % MOD);
            add(avem, stiva[vf].second);
            vf--;
        }
        add(total, (scor * w[i]) % MOD);
        stiva[++vf] = {h[i], avem};
        add(scor, (gauss(stiva[vf].first) * stiva[vf].second) % MOD);
    }
    cout << total;
    return 0;
}

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 328 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 10 ms 1612 KB Output is correct
4 Correct 18 ms 3020 KB Output is correct
5 Correct 19 ms 3040 KB Output is correct
6 Correct 20 ms 2936 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 360 KB Output is correct
2 Correct 3 ms 664 KB Output is correct
3 Correct 12 ms 2016 KB Output is correct
4 Correct 22 ms 2700 KB Output is correct
5 Correct 25 ms 2764 KB Output is correct
6 Correct 0 ms 340 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 3 ms 596 KB Output is correct
4 Correct 12 ms 2004 KB Output is correct
5 Correct 22 ms 2696 KB Output is correct
6 Correct 24 ms 2760 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 4 ms 724 KB Output is correct
9 Correct 13 ms 2260 KB Output is correct
10 Correct 21 ms 4328 KB Output is correct
11 Correct 23 ms 5244 KB Output is correct
12 Correct 0 ms 212 KB Output is correct

Subtask #6
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 328 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 1 ms 340 KB Output is correct

Subtask #7
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 336 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 10 ms 1620 KB Output is correct
12 Correct 18 ms 3028 KB Output is correct
13 Correct 19 ms 3008 KB Output is correct
14 Correct 19 ms 2972 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 3 ms 584 KB Output is correct
17 Correct 12 ms 1984 KB Output is correct
18 Correct 25 ms 3956 KB Output is correct
19 Correct 25 ms 3920 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 3 ms 756 KB Output is correct
22 Correct 13 ms 2396 KB Output is correct
23 Correct 22 ms 5240 KB Output is correct
24 Correct 22 ms 5352 KB Output is correct
25 Correct 0 ms 340 KB Output is correct
26 Correct 0 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 3 ms 596 KB Output is correct
31 Correct 3 ms 584 KB Output is correct
32 Correct 12 ms 1876 KB Output is correct
33 Correct 12 ms 2072 KB Output is correct
34 Correct 23 ms 3632 KB Output is correct
35 Correct 23 ms 3532 KB Output is correct
36 Correct 24 ms 3732 KB Output is correct
37 Correct 25 ms 3720 KB Output is correct
38 Correct 0 ms 340 KB Output is correct
39 Correct 23 ms 3788 KB Output is correct
40 Correct 23 ms 3752 KB Output is correct
41 Correct 24 ms 4036 KB Output is correct
42 Correct 23 ms 4564 KB Output is correct