Submission #1051010

#	Time	Username	Problem	Language	Result	Execution time	Memory
1051010		dpsaveslives	Watching (JOI13_watching)	C++17	0 / 100	1 ms	348 KiB

watching

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

int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int N,P,Q; cin >> N >> P >> Q;
    vector<int> arr(N);
    for(int i = 0;i<N;++i) cin >> arr[i];
    if(P+Q >= N){
        cout << 1 << "\n";
        return 0;
    }
    sort(arr.begin(),arr.end());
    int lo = 0, hi = 1e9;
    while(lo < hi){
        int w = lo+(hi-lo)/2;
        vector<vector<int>> dp(P+1,vector<int>(Q+1,0));
        for(int i = 0;i<=P;++i){
            for(int j = 0;j<=Q;++j){
                int ind = dp[i][j];
                if(i < P){
                    int it = lower_bound(arr.begin(),arr.end(),arr[ind]+w)-arr.begin();
                    dp[i+1][j] = max(dp[i+1][j],it);
                }
                if(j < Q){
                    int it2 = lower_bound(arr.begin(),arr.end(),arr[ind]+2*w)-arr.begin();
                    dp[i][j+1] = max(dp[i][j+1],it2);
                }
            }
        }
        if(dp[P][Q] >= N){
            hi = w;
        }
        else{
            lo = w+1;
        }
    }
    cout << lo << "\n";
    return 0;
}

• Subtask 1: 0 / 50
• Subtask 2: 0 / 50