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Submission #945600

# Submission time Handle Problem Language Result Execution time Memory
945600 2024-03-14T05:30:51 Z salmon Fancy Fence (CEOI20_fancyfence) C++14
100 / 100
 38 ms 6272 KB 
#include <bits/stdc++.h>
using namespace std;

int N;
priority_queue<pair<long long int,int>> pq;
long long int h[100100];
long long int w[100100];
int parent[100100];
long long int sise[100100];
long long int mal = 0;
long long int mod = 1'000'000'007;
bool a[100100];
long long int ans = 0;

int root(int i){
    if(parent[i] == i) return i;
    return parent[i] = root(parent[i]);
}

void connect(int a, int b){
    a = root(a);
    b = root(b);

    if(a == b) return;

    mal -= (sise[a] * (sise[a] + 1)/2) + (sise[b] * (sise[b] + 1)/2);
    sise[a] += sise[b];
    mal += (sise[a] * (sise[a] + 1)/2);
    sise[a] %= mod;
    mal %= mod;
    parent[b] = a;
}

int main(){
    scanf(" %d",&N);

    for(int i = 0; i < N; i++){
        parent[i] = i;

        scanf(" %lld",&h[i]);
        pq.push(make_pair(h[i],i));
        a[i] = false;
    }

    pq.push({0,N});

    for(int i = 0; i < N; i++){
        scanf(" %lld",&w[i]);
        sise[i] = w[i];
    }


    long long int ph = 0;

    while(!pq.empty()){
        long long int h1 = pq.top().first;
        int it = pq.top().second;
        pq.pop();
        //printf("%lld ",mal);

        if(mal != 0){
            ans += (ph * (ph + 1) / 2 - h1 * (h1 + 1) / 2) % mod * mal;
            ans %= mod;
        }

        ph = h1;

        a[it] = true;
        mal += sise[it] * (sise[it] + 1 )/2;
        mal %= mod;

        if(it < N - 1 && a[it + 1]){
            connect(it, it + 1);
        }
        if(it > 0 && a[it - 1]){
            connect(it, it - 1);
        }
    }

    printf("%lld",ans);
}
/*
1
1000
1000
*/

Compilation message

fancyfence.cpp: In function 'int main()':
fancyfence.cpp:35:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |     scanf(" %d",&N);
      |     ~~~~~^~~~~~~~~~
fancyfence.cpp:40:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |         scanf(" %lld",&h[i]);
      |         ~~~~~^~~~~~~~~~~~~~~
fancyfence.cpp:48:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |         scanf(" %lld",&w[i]);
      |         ~~~~~^~~~~~~~~~~~~~~

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2648 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 16 ms 3792 KB Output is correct
4 Correct 30 ms 5820 KB Output is correct
5 Correct 31 ms 5496 KB Output is correct
6 Correct 29 ms 5072 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 4 ms 2776 KB Output is correct
3 Correct 16 ms 4284 KB Output is correct
4 Correct 34 ms 6100 KB Output is correct
5 Correct 36 ms 6092 KB Output is correct
6 Correct 1 ms 2392 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 4 ms 2776 KB Output is correct
4 Correct 17 ms 4360 KB Output is correct
5 Correct 33 ms 6268 KB Output is correct
6 Correct 32 ms 6084 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 4 ms 2776 KB Output is correct
9 Correct 19 ms 4304 KB Output is correct
10 Correct 31 ms 6252 KB Output is correct
11 Correct 32 ms 6092 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct

Subtask #6
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2392 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2404 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 0 ms 2396 KB Output is correct

Subtask #7
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 16 ms 3776 KB Output is correct
12 Correct 30 ms 5836 KB Output is correct
13 Correct 30 ms 5436 KB Output is correct
14 Correct 29 ms 5072 KB Output is correct
15 Correct 1 ms 2392 KB Output is correct
16 Correct 4 ms 2776 KB Output is correct
17 Correct 16 ms 4268 KB Output is correct
18 Correct 32 ms 6084 KB Output is correct
19 Correct 32 ms 6080 KB Output is correct
20 Correct 1 ms 2392 KB Output is correct
21 Correct 4 ms 2772 KB Output is correct
22 Correct 16 ms 4280 KB Output is correct
23 Correct 31 ms 6080 KB Output is correct
24 Correct 32 ms 6272 KB Output is correct
25 Correct 0 ms 2396 KB Output is correct
26 Correct 1 ms 2488 KB Output is correct
27 Correct 1 ms 2396 KB Output is correct
28 Correct 1 ms 2396 KB Output is correct
29 Correct 1 ms 2396 KB Output is correct
30 Correct 4 ms 2776 KB Output is correct
31 Correct 4 ms 2776 KB Output is correct
32 Correct 18 ms 3540 KB Output is correct
33 Correct 18 ms 3692 KB Output is correct
34 Correct 35 ms 5072 KB Output is correct
35 Correct 36 ms 5068 KB Output is correct
36 Correct 36 ms 5072 KB Output is correct
37 Correct 38 ms 5072 KB Output is correct
38 Correct 1 ms 2392 KB Output is correct
39 Correct 38 ms 5068 KB Output is correct
40 Correct 35 ms 5068 KB Output is correct
41 Correct 31 ms 5072 KB Output is correct
42 Correct 32 ms 5588 KB Output is correct