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Submission #955806

# Submission time Handle Problem Language Result Execution time Memory
955806 2024-03-31T12:39:03 Z vjudge1 Sparklers (JOI17_sparklers) C++17
50 / 100
 48 ms 8660 KB 
#include <bits/stdc++.h>

using namespace std;

const long long mod = 1e9 + 7;
const long long maxn=1000+10;
const long long logn=25;

long long n,k,t;
long long x[maxn];
long long dp[maxn][maxn];
long long kol=0;

long long f(long long L,long long R)
{
    if(L==0 && R==n-1)
    {
        return true;
    }
    if(dp[L][R]!=-1)
    {
        return dp[L][R];
    }
    long long rez=0;
    if(R<n-1 && (x[R+1]-x[L])<=(R-L+1)*t*(2*kol))
    {
        rez=max(rez,f(L,R+1));
    }
    if(L>0 && (x[R]-x[L-1])<=(R-L+1)*t*(2*kol))
    {
        rez=max(rez,f(L-1,R));
    }
    return dp[L][R]=rez;
}

int main()
{
    ios::sync_with_stdio(false);
    cin>>n>>k>>t;
    k--;
    for(long long i=0;i<n;i++)
    {
        cin>>x[i];
    }
    long long l=0;
    long long r=x[n-1]-x[0];
    long long ans=0;
    while(l<=r)
    {
        memset(dp,-1,sizeof dp);
        long long mid=l+(r-l)/2;
        kol=mid;
        if(f(k,k))
        {
            ans=mid;
            r=mid-1;
        }
        else
        {
            l=mid+1;
        }
    }
    cout<<ans<<endl;

    /*long long m,n;
    cin>>m>>n;
    long long mi=2e9;
    long long mx=-1;
    vector<pair<pair<long long,long long>,pair<long long,long long>>>p;
    vector<pair<pair<long long,long long>,pair<long long,long long>>>x;
    for(long long i=0;i<m;i++)
    {
        long long a,b,c,d;
        cin>>a>>b>>c>>d;
        p.push_back({{a,b},{c,d}});
        mi=min(mi,a);
        mx=max(mx,b);
    }
    n=mx-mi+1;
    map<long long,long long>m;
    long long cnt=0;
    for(long long i=mi;i<=mx;i++)
    {
        m[i]=cnt;
        cnt++;
    }
    for(long long i=0;i<m;i++)
    {
        long long a=p.first.first;
        long long b=p.first.second;
        long long c=p.second.first;
        long long d=p.second.second;
        x.push_back({{m[a],m[b]},{m[c],m[d]}});
    }*/

    return 0;
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 8280 KB Output is correct
2 Correct 5 ms 8284 KB Output is correct
3 Correct 5 ms 8284 KB Output is correct
4 Correct 5 ms 8448 KB Output is correct
5 Correct 6 ms 8284 KB Output is correct
6 Correct 7 ms 8284 KB Output is correct
7 Correct 5 ms 8284 KB Output is correct
8 Correct 5 ms 8284 KB Output is correct
9 Correct 5 ms 8280 KB Output is correct
10 Correct 5 ms 8280 KB Output is correct
11 Correct 5 ms 8284 KB Output is correct
12 Correct 5 ms 8284 KB Output is correct
13 Correct 5 ms 8240 KB Output is correct
14 Correct 5 ms 8280 KB Output is correct
15 Correct 5 ms 8284 KB Output is correct
16 Correct 5 ms 8284 KB Output is correct
17 Correct 5 ms 8444 KB Output is correct
18 Correct 5 ms 8284 KB Output is correct
19 Correct 2 ms 8284 KB Output is correct
20 Correct 6 ms 8284 KB Output is correct
21 Correct 2 ms 8284 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 8280 KB Output is correct
2 Correct 5 ms 8284 KB Output is correct
3 Correct 5 ms 8284 KB Output is correct
4 Correct 5 ms 8448 KB Output is correct
5 Correct 6 ms 8284 KB Output is correct
6 Correct 7 ms 8284 KB Output is correct
7 Correct 5 ms 8284 KB Output is correct
8 Correct 5 ms 8284 KB Output is correct
9 Correct 5 ms 8280 KB Output is correct
10 Correct 5 ms 8280 KB Output is correct
11 Correct 5 ms 8284 KB Output is correct
12 Correct 5 ms 8284 KB Output is correct
13 Correct 5 ms 8240 KB Output is correct
14 Correct 5 ms 8280 KB Output is correct
15 Correct 5 ms 8284 KB Output is correct
16 Correct 5 ms 8284 KB Output is correct
17 Correct 5 ms 8444 KB Output is correct
18 Correct 5 ms 8284 KB Output is correct
19 Correct 2 ms 8284 KB Output is correct
20 Correct 6 ms 8284 KB Output is correct
21 Correct 2 ms 8284 KB Output is correct
22 Correct 31 ms 8456 KB Output is correct
23 Correct 24 ms 8284 KB Output is correct
24 Correct 11 ms 8536 KB Output is correct
25 Correct 8 ms 8280 KB Output is correct
26 Correct 27 ms 8480 KB Output is correct
27 Correct 31 ms 8660 KB Output is correct
28 Correct 47 ms 8280 KB Output is correct
29 Correct 42 ms 8480 KB Output is correct
30 Correct 35 ms 8284 KB Output is correct
31 Correct 35 ms 8284 KB Output is correct
32 Correct 39 ms 8480 KB Output is correct
33 Correct 48 ms 8484 KB Output is correct
34 Correct 26 ms 8504 KB Output is correct
35 Correct 48 ms 8284 KB Output is correct
36 Correct 16 ms 8280 KB Output is correct
37 Correct 15 ms 8284 KB Output is correct
38 Correct 41 ms 8488 KB Output is correct
39 Correct 15 ms 8280 KB Output is correct
40 Correct 4 ms 8536 KB Output is correct

Subtask #3
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 8280 KB Output is correct
2 Correct 5 ms 8284 KB Output is correct
3 Correct 5 ms 8284 KB Output is correct
4 Correct 5 ms 8448 KB Output is correct
5 Correct 6 ms 8284 KB Output is correct
6 Correct 7 ms 8284 KB Output is correct
7 Correct 5 ms 8284 KB Output is correct
8 Correct 5 ms 8284 KB Output is correct
9 Correct 5 ms 8280 KB Output is correct
10 Correct 5 ms 8280 KB Output is correct
11 Correct 5 ms 8284 KB Output is correct
12 Correct 5 ms 8284 KB Output is correct
13 Correct 5 ms 8240 KB Output is correct
14 Correct 5 ms 8280 KB Output is correct
15 Correct 5 ms 8284 KB Output is correct
16 Correct 5 ms 8284 KB Output is correct
17 Correct 5 ms 8444 KB Output is correct
18 Correct 5 ms 8284 KB Output is correct
19 Correct 2 ms 8284 KB Output is correct
20 Correct 6 ms 8284 KB Output is correct
21 Correct 2 ms 8284 KB Output is correct
22 Correct 31 ms 8456 KB Output is correct
23 Correct 24 ms 8284 KB Output is correct
24 Correct 11 ms 8536 KB Output is correct
25 Correct 8 ms 8280 KB Output is correct
26 Correct 27 ms 8480 KB Output is correct
27 Correct 31 ms 8660 KB Output is correct
28 Correct 47 ms 8280 KB Output is correct
29 Correct 42 ms 8480 KB Output is correct
30 Correct 35 ms 8284 KB Output is correct
31 Correct 35 ms 8284 KB Output is correct
32 Correct 39 ms 8480 KB Output is correct
33 Correct 48 ms 8484 KB Output is correct
34 Correct 26 ms 8504 KB Output is correct
35 Correct 48 ms 8284 KB Output is correct
36 Correct 16 ms 8280 KB Output is correct
37 Correct 15 ms 8284 KB Output is correct
38 Correct 41 ms 8488 KB Output is correct
39 Correct 15 ms 8280 KB Output is correct
40 Correct 4 ms 8536 KB Output is correct
41 Runtime error 1 ms 600 KB Execution killed with signal 11
42 Halted 0 ms 0 KB -