Submission #878963

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
878963	2023-11-25T19:59:21 Z	eitanelb	Sparklers (JOI17_sparklers)	C++14	0 / 100	1 ms	600 KB

sparklers

#include <bits/stdc++.h>
using namespace std;

bool ok(int n, int k, vector<int>&v, long m){
    bool dp[n][n];
    for(int i=0;i<n;i++)for(int j=0;j<n;j++) dp[i][j]=0;
    dp[k-1][k-1]=1;
    for(int sz=2;sz<=n;sz++){
        for(int i=0;i+sz-1 < n;i++){
            if(((v[i+sz-1]-v[i]) <= 2*m*(sz-1)) && (dp[i][i+sz-2] || dp[i+1][i+sz-1])) dp[i][i+sz-1]=1;
        }
    }
    //cout<<m<<' '<<dp[0][n-1]<<endl;
    return dp[0][n-1];
}
int func(int n, int k, int t, vector<int>&v){
    int s=1, e=1e9, m;
    while(e>s){
        m = (e+s)/2;
        if(ok(n,k,v,m)) e=m;
        else s=m+1;
    }
    return (s+t-1)/t;
}

int main(){
    ios::sync_with_stdio(0); cin.tie(0);
    int n,k,t;
    cin>>n>>k>>t;
    vector<int> v(n);
    for(int i=0;i<n;i++) cin>>v[i];
    
    int res = func(n,k,t,v);
    
    cout<<res<<endl;
}

Subtask #1

0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 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	344 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	344 KB	Output is correct
8	Correct	1 ms	348 KB	Output is correct
9	Correct	1 ms	600 KB	Output is correct
10	Correct	1 ms	348 KB	Output is correct
11	Correct	1 ms	456 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	1 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	1 ms	348 KB	Output is correct
18	Correct	1 ms	344 KB	Output is correct
19	Incorrect	0 ms	344 KB	Output isn't correct
20	Halted	0 ms	0 KB	-

Subtask #2

0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 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	344 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	344 KB	Output is correct
8	Correct	1 ms	348 KB	Output is correct
9	Correct	1 ms	600 KB	Output is correct
10	Correct	1 ms	348 KB	Output is correct
11	Correct	1 ms	456 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	1 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	1 ms	348 KB	Output is correct
18	Correct	1 ms	344 KB	Output is correct
19	Incorrect	0 ms	344 KB	Output isn't correct
20	Halted	0 ms	0 KB	-

Subtask #3

0 / 50.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 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	344 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	344 KB	Output is correct
8	Correct	1 ms	348 KB	Output is correct
9	Correct	1 ms	600 KB	Output is correct
10	Correct	1 ms	348 KB	Output is correct
11	Correct	1 ms	456 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	1 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	1 ms	348 KB	Output is correct
18	Correct	1 ms	344 KB	Output is correct
19	Incorrect	0 ms	344 KB	Output isn't correct
20	Halted	0 ms	0 KB	-