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Submission #548735

# Submission time Handle Problem Language Result Execution time Memory
548735 2022-04-14T10:58:47 Z ToroTN Fancy Fence (CEOI20_fancyfence) C++14
100 / 100
 49 ms 6680 KB 
#include<bits/stdc++.h>
using namespace std;
#pragma GCC optimize("O3")
#pragma GCC target ("sse4")
int n,h[100005],w[100005];
int num=0,l,r,lft,rht,cnt;
int node,exist[100005],a[100005];
long long pp=1e9*(1e9+7),sum=0,opt2=0,ans=0,val[100005];
int md=1e9+7;
int opt[100005],headl[1000005],headr[100005];
int value[100005];
vector<pair<int,int> > v;
long long supersum(int a,int b)
{
    return ((long long)(a+b)*(long long)(b-a+1)/2)%(long long)md;
}
int main()
{
    scanf("%d",&n);
    for(int i=1;i<=n;i++)
    {
        headl[i]=i;
        headr[i]=i;
        scanf("%d",&h[i]);
        v.push_back({-h[i],i});
    }
    for(int i=1;i<=n;i++)
    {
        scanf("%d",&w[i]);
        value[i]=w[i];
    }
    sort(v.begin(),v.end());
    for(int i=0;i<v.size();i++)
    {
        //printf("%d %d\n",v[i].first,v[i].second);
        if(i==0)
        {
            cnt=1;
        }else
        {
            if(v[i].first!=v[i-1].first)++cnt;
        }
        a[cnt]=-v[i].first;
        node=v[i].second;
        l=value[node-1];
        r=value[node+1];
        lft=node;
        rht=node;
        opt2=w[node];
        if(exist[node-1]!=0)
        {
            opt2+=l;
            opt2%=md;
            sum-=supersum(1,l);
            sum+=pp;
            sum%=md;
            lft=headl[node-1];
        }
        if(exist[node+1]!=0)
        {
            opt2+=r;
            opt2%=md;
            sum-=supersum(1,r);
            sum+=pp;
            sum%=md;
            rht=headr[node+1];
        }
        sum+=supersum(1,opt2);
        sum%=md;
        //printf("%lld\n",sum);
        headr[lft]=rht;
        headl[rht]=lft;
        value[lft]=opt2;
        value[rht]=opt2;
        ++exist[node];
        val[cnt]=sum;
    }
    ans+=(supersum(1,a[cnt]))*val[cnt];
    ans%=md;
    for(int i=cnt-1;i>=1;i--)
    {
        ans-=val[i]*(supersum(a[i]+1,a[i+1]));
        ans+=pp;
        ans%=md;
    }
    printf("%lld\n",ans);
}
/*
5
2 7 4 1 4
3 2 4 2 4
*/
/*
3
1 3 2
2 3 1
*/
/*
5
2 5 1 5 3
2 2 3 2 3
*/

Compilation message

fancyfence.cpp: In function 'int main()':
fancyfence.cpp:33:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |     for(int i=0;i<v.size();i++)
      |                 ~^~~~~~~~~
fancyfence.cpp:19:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
fancyfence.cpp:24:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |         scanf("%d",&h[i]);
      |         ~~~~~^~~~~~~~~~~~
fancyfence.cpp:29:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |         scanf("%d",&w[i]);
      |         ~~~~~^~~~~~~~~~~~

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 324 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 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 312 KB Output is correct
5 Correct 0 ms 312 KB Output is correct

Subtask #3
13.0 / 13.0

# 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 16 ms 2532 KB Output is correct
4 Correct 38 ms 4668 KB Output is correct
5 Correct 34 ms 4740 KB Output is correct
6 Correct 29 ms 4724 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 3 ms 980 KB Output is correct
3 Correct 16 ms 2888 KB Output is correct
4 Correct 37 ms 5624 KB Output is correct
5 Correct 32 ms 5564 KB Output is correct
6 Correct 0 ms 316 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 320 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 5 ms 992 KB Output is correct
4 Correct 22 ms 2980 KB Output is correct
5 Correct 39 ms 5508 KB Output is correct
6 Correct 31 ms 5540 KB Output is correct
7 Correct 1 ms 324 KB Output is correct
8 Correct 3 ms 1108 KB Output is correct
9 Correct 17 ms 3244 KB Output is correct
10 Correct 31 ms 6552 KB Output is correct
11 Correct 34 ms 6576 KB Output is correct
12 Correct 1 ms 312 KB Output is correct

Subtask #6
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 380 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 328 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 316 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 324 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 320 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 328 KB Output is correct
11 Correct 16 ms 2572 KB Output is correct
12 Correct 30 ms 4660 KB Output is correct
13 Correct 33 ms 4728 KB Output is correct
14 Correct 29 ms 4672 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 4 ms 980 KB Output is correct
17 Correct 20 ms 3004 KB Output is correct
18 Correct 44 ms 5444 KB Output is correct
19 Correct 34 ms 5528 KB Output is correct
20 Correct 1 ms 328 KB Output is correct
21 Correct 5 ms 996 KB Output is correct
22 Correct 16 ms 3140 KB Output is correct
23 Correct 30 ms 6488 KB Output is correct
24 Correct 33 ms 6584 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 2 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 4 ms 1108 KB Output is correct
31 Correct 4 ms 1108 KB Output is correct
32 Correct 18 ms 2900 KB Output is correct
33 Correct 19 ms 3572 KB Output is correct
34 Correct 35 ms 6332 KB Output is correct
35 Correct 38 ms 5308 KB Output is correct
36 Correct 39 ms 6680 KB Output is correct
37 Correct 40 ms 6172 KB Output is correct
38 Correct 1 ms 320 KB Output is correct
39 Correct 49 ms 6120 KB Output is correct
40 Correct 36 ms 6588 KB Output is correct
41 Correct 34 ms 6588 KB Output is correct
42 Correct 35 ms 6620 KB Output is correct