oj.uz

Submission #478310

# Submission time Handle Problem Language Result Execution time Memory
478310 2021-10-07T01:25:01 Z Haruto810198 Fancy Fence (CEOI20_fancyfence) C++17
100 / 100
 62 ms 10172 KB 
#include <bits/stdc++.h>

using namespace std;

#define int long long
#define double long double

#define FOR(i, l, r, d) for(int i=(l); i<=(r); i+=(d))
#define szof(x) ((int)(x).size())

#define vi vector<int>
#define pii pair<int, int>

#define F first
#define S second

#define pb push_back
#define eb emplace_back
#define mkp make_pair

const int INF = 2147483647;
const int LNF = INF*INF;
const int MOD = 1000000007;
const int mod = 998244353;
const double eps = 1e-12;

//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("unroll-loops")

const int MAX = 100010;

int n;
int h[MAX], w[MAX];
bool vis[MAX];

int p[MAX], dep[MAX];
int wsum[MAX], l[MAX], r[MAX];

int res;

int findp(int v){
    if(v == p[v]) return v;
    return p[v] = findp(p[v]);
}

void uni(int u, int v){

    int pu = findp(u);
    int pv = findp(v);
    if(pu == pv) return;
    if(dep[pu] < dep[pv]) swap(pu, pv);
    p[pv] = pu;
    if(dep[pu] > dep[pv]) dep[pu]++;

    wsum[pu] += wsum[pv];
    l[pu] = min(l[pu], l[pv]);
    r[pu] = max(r[pu], r[pv]);

}

signed main(){

    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);

    //freopen("fancyfence_sample.txt", "r", stdin);

    cin>>n;
    FOR(i, 1, n, 1){
        cin>>h[i];
    }
    FOR(i, 1, n, 1){
        cin>>w[i];
    }

    FOR(i, 1, n, 1){
        vis[i] = 0;
        p[i] = i;
        dep[i] = 0;
        wsum[i] = w[i];
        l[i] = r[i] = i;
    }

    vector<pii> owo;
    FOR(i, 1, n, 1){
        owo.eb(h[i], i);
    }

    sort(owo.begin(), owo.end());
    reverse(owo.begin(), owo.end());

    for(pii i : owo){
        int id = i.S;
        vis[id] = 1;
        if(vis[id - 1]) uni(id - 1, id);
        if(vis[id + 1]) uni(id, id + 1);

        int U = h[id];
        int D = max(h[l[findp(id)] - 1], h[r[findp(id)] + 1]) + 1;
        int W = wsum[findp(id)] % MOD;
        res += (((U + D) * (U - D + 1) / 2) % MOD) * ((W * (W + 1) / 2) % MOD);
        res %= MOD;

        //cerr<<"U = "<<U<<", D = "<<D<<", res += "<<(((U + D) * (U - D + 1) / 2) % MOD) * ((W * (W + 1) / 2) % MOD)<<endl;
    }

    cout<<res<<'\n';

    return 0;

}

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 460 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 0 ms 320 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 15 ms 4876 KB Output is correct
4 Correct 40 ms 9136 KB Output is correct
5 Correct 30 ms 9236 KB Output is correct
6 Correct 32 ms 9156 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 460 KB Output is correct
2 Correct 3 ms 1484 KB Output is correct
3 Correct 16 ms 5324 KB Output is correct
4 Correct 37 ms 9936 KB Output is correct
5 Correct 35 ms 10036 KB Output is correct
6 Correct 1 ms 332 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 1 ms 460 KB Output is correct
3 Correct 4 ms 1484 KB Output is correct
4 Correct 17 ms 5224 KB Output is correct
5 Correct 35 ms 9928 KB Output is correct
6 Correct 33 ms 10088 KB Output is correct
7 Correct 1 ms 352 KB Output is correct
8 Correct 3 ms 1428 KB Output is correct
9 Correct 18 ms 5300 KB Output is correct
10 Correct 41 ms 9980 KB Output is correct
11 Correct 41 ms 9928 KB Output is correct
12 Correct 0 ms 332 KB Output is correct

Subtask #6
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 456 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 460 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 324 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 460 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 0 ms 332 KB Output is correct

Subtask #7
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 460 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 0 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 15 ms 4816 KB Output is correct
12 Correct 28 ms 9220 KB Output is correct
13 Correct 31 ms 9216 KB Output is correct
14 Correct 34 ms 9184 KB Output is correct
15 Correct 1 ms 460 KB Output is correct
16 Correct 3 ms 1484 KB Output is correct
17 Correct 16 ms 5212 KB Output is correct
18 Correct 34 ms 9920 KB Output is correct
19 Correct 36 ms 10004 KB Output is correct
20 Correct 2 ms 332 KB Output is correct
21 Correct 3 ms 1464 KB Output is correct
22 Correct 16 ms 5196 KB Output is correct
23 Correct 29 ms 9800 KB Output is correct
24 Correct 28 ms 9904 KB Output is correct
25 Correct 0 ms 332 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 460 KB Output is correct
28 Correct 1 ms 460 KB Output is correct
29 Correct 1 ms 332 KB Output is correct
30 Correct 5 ms 1484 KB Output is correct
31 Correct 5 ms 1480 KB Output is correct
32 Correct 21 ms 5176 KB Output is correct
33 Correct 21 ms 5180 KB Output is correct
34 Correct 45 ms 9744 KB Output is correct
35 Correct 44 ms 9720 KB Output is correct
36 Correct 43 ms 9936 KB Output is correct
37 Correct 62 ms 9964 KB Output is correct
38 Correct 1 ms 332 KB Output is correct
39 Correct 48 ms 9976 KB Output is correct
40 Correct 37 ms 9996 KB Output is correct
41 Correct 33 ms 9936 KB Output is correct
42 Correct 28 ms 10172 KB Output is correct