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Submission #1104133

# Submission time Handle Problem Language Result Execution time Memory
1104133 2024-10-23T01:59:57 Z ezzzay Fancy Fence (CEOI20_fancyfence) C++14
0 / 100
 2 ms 2384 KB 
#include<bits/stdc++.h>
using namespace std;
#define ff first
#define ss second
#define pb push_back
const int N=3e5+5;
int h[N];
int w[N];
int ps[N];
int mod=1e9+7;
int modd(int n){
    return (n%mod+mod)%mod;
}
int calc(int a, int b){
    int f=(a*(a+1))%mod*((mod+1)/2)%mod;
    int s=(b*(b+1))%mod*((mod+1)/2)%mod;
    return (f*s)%mod;
}
signed main(){
    int n;
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>h[i];
    }
    for(int i=1;i<=n;i++){
        cin>>w[i];
    }
    int ans=0;
    for(int i=n;i>=1;i--){
        ps[i]=ps[i+1]+w[i];
        ans+=calc(h[i],ps[i])-calc(h[i-1],ps[i]);
        ans=modd(ans);
    }
    cout<<ans;
}

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2384 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2384 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2384 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 2384 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2384 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2384 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 27.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2384 KB Output isn't correct
2 Halted 0 ms 0 KB -