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Submission #1015027

# Submission time Handle Problem Language Result Execution time Memory
1015027 2024-07-06T03:11:53 Z doducanh Fancy Fence (CEOI20_fancyfence) C++14
100 / 100
 61 ms 6224 KB 
#include <bits/stdc++.h>

using namespace std;
#define int long long
#define h first
#define w second
pair<int,int>a[100005];
int f[100005];
int dp[100005];
const int mod=1e9+7;
int n;
int mul(int a,int b)
{
    return a*b%mod;
}
int sum(int a)
{
    return (a*(a+1)/2)%mod;
}
main()
{
    cin>>n;
    for(int i=1;i<=n;i++)cin>>a[i].h;
    for(int i=1;i<=n;i++){
        cin>>a[i].w;
        f[i]=(f[i-1]+a[i].w)%mod;
    }
    int ans=0;
    stack<int>s;
    s.push(0);
    for(int i=1;i<=n;i++){
        while(s.size()&&a[s.top()].h>=a[i].h)s.pop();
        int len=(f[i]-f[s.top()]+mod)%mod;
        int l1=(len-a[i].w+mod)%mod;
        int A=0,B=0;
        (A+=mul(sum(a[i].h),sum(a[i].w)))%=mod;
        (A+=(mul(mul(l1,sum(a[i].h)),a[i].w)))%=mod;
        (B+=mul(dp[s.top()],a[i].w))%=mod;
        dp[i]=(dp[s.top()]+mul(len,sum(a[i].h)))%mod;
        ans=(ans+A+B)%mod;
        s.push(i);
    }
    cout<<ans;
    return 0;
}

Compilation message

fancyfence.cpp:20:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   20 | main()
      | ^~~~

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 344 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 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 508 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 1 ms 348 KB Output is correct
3 Correct 18 ms 2464 KB Output is correct
4 Correct 32 ms 4516 KB Output is correct
5 Correct 33 ms 4692 KB Output is correct
6 Correct 36 ms 4696 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 5 ms 860 KB Output is correct
3 Correct 25 ms 2772 KB Output is correct
4 Correct 49 ms 5340 KB Output is correct
5 Correct 51 ms 5456 KB Output is correct
6 Correct 0 ms 344 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 492 KB Output is correct
3 Correct 6 ms 860 KB Output is correct
4 Correct 22 ms 2848 KB Output is correct
5 Correct 50 ms 5460 KB Output is correct
6 Correct 47 ms 5456 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 5 ms 836 KB Output is correct
9 Correct 27 ms 3164 KB Output is correct
10 Correct 56 ms 5980 KB Output is correct
11 Correct 50 ms 6224 KB Output is correct
12 Correct 0 ms 348 KB Output is correct

Subtask #6
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 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 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 448 KB Output is correct
7 Correct 0 ms 448 KB Output is correct
8 Correct 1 ms 344 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 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct

Subtask #7
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 2 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 344 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 1 ms 348 KB Output is correct
11 Correct 16 ms 2396 KB Output is correct
12 Correct 32 ms 4692 KB Output is correct
13 Correct 42 ms 4688 KB Output is correct
14 Correct 34 ms 4696 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 9 ms 860 KB Output is correct
17 Correct 24 ms 2952 KB Output is correct
18 Correct 43 ms 5460 KB Output is correct
19 Correct 46 ms 5468 KB Output is correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 5 ms 860 KB Output is correct
22 Correct 25 ms 3116 KB Output is correct
23 Correct 46 ms 6120 KB Output is correct
24 Correct 45 ms 6224 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 5 ms 880 KB Output is correct
31 Correct 4 ms 848 KB Output is correct
32 Correct 23 ms 2880 KB Output is correct
33 Correct 24 ms 2920 KB Output is correct
34 Correct 49 ms 5284 KB Output is correct
35 Correct 54 ms 5132 KB Output is correct
36 Correct 61 ms 5456 KB Output is correct
37 Correct 46 ms 5340 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 47 ms 5460 KB Output is correct
40 Correct 46 ms 5456 KB Output is correct
41 Correct 46 ms 5460 KB Output is correct
42 Correct 47 ms 5712 KB Output is correct