oj.uz

Submission #954201

# Submission time Handle Problem Language Result Execution time Memory
954201 2024-03-27T11:42:20 Z irmuun Watching (JOI13_watching) C++17
100 / 100
 625 ms 31936 KB 
#include<bits/stdc++.h>

using namespace std;

#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    ll n,p,q;
    cin>>n>>p>>q;
    ll a[n+5];
    for(ll i=1;i<=n;i++){
        cin>>a[i];
    }
    if(p+q>=n){
        cout<<1;
        return 0;
    }
    sort(a+1,a+n+1);
    ll l=1,r=1e9;
    ll dp[n+5][n+5];
    while(l<r){
        ll w=(l+r)/2;
        memset(dp,0,sizeof dp);
        for(ll sum=0;sum<=p+q;sum++){
            for(ll i=0;i<=sum;i++){
                if(i<=p&&sum-i<=q){
                    ll j=sum-i;
                    if(i==0&&j==0){
                        dp[i][j]=0;
                        continue;
                    }
                    ll nxt=0;
                    if(i>0){
                        if(dp[i-1][j]==n){
                            dp[i][j]=n;
                            continue;
                        }
                        ll R=dp[i-1][j]+1;
                        R=lower_bound(a+1,a+n+1,a[dp[i-1][j]+1]+w)-a;
                        R--;
                        dp[i][j]=max(dp[i][j],R);
                    }
                    if(j>0){
                        if(dp[i][j-1]==n){
                            dp[i][j]=n;
                            continue;
                        }
                        ll R=dp[i][j-1]+1;
                        R=lower_bound(a+1,a+n+1,a[dp[i][j-1]+1]+2*w)-a;
                        R--;
                        dp[i][j]=max(dp[i][j],R);
                    }
                }
            }
        }
        if(dp[p][q]==n){
            r=w;
        }
        else{
            l=w+1;
        }
    }
    cout<<l;
}

Compilation message

watching.cpp: In function 'int main()':
watching.cpp:38:24: warning: unused variable 'nxt' [-Wunused-variable]
   38 |                     ll nxt=0;
      |                        ^~~

Subtask #1
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 352 KB Output is correct
2 Correct 0 ms 352 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 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 352 KB Output is correct
10 Correct 1 ms 352 KB Output is correct
11 Correct 2 ms 348 KB Output is correct
12 Correct 3 ms 348 KB Output is correct
13 Correct 0 ms 600 KB Output is correct
14 Correct 1 ms 352 KB Output is correct
15 Correct 0 ms 532 KB Output is correct

Subtask #2
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 98 ms 31836 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 352 KB Output is correct
4 Correct 1 ms 352 KB Output is correct
5 Correct 1 ms 472 KB Output is correct
6 Correct 1 ms 352 KB Output is correct
7 Correct 100 ms 31740 KB Output is correct
8 Correct 173 ms 31936 KB Output is correct
9 Correct 193 ms 31932 KB Output is correct
10 Correct 257 ms 31936 KB Output is correct
11 Correct 218 ms 31804 KB Output is correct
12 Correct 625 ms 31928 KB Output is correct
13 Correct 101 ms 31836 KB Output is correct
14 Correct 98 ms 31936 KB Output is correct
15 Correct 97 ms 31836 KB Output is correct