Submission #499096

#	Time	Username	Problem	Language	Result	Execution time	Memory
499096		Kipras	Swimming competition (LMIO18_plaukimo_varzybos)	C++14	20 / 100	2033 ms	14808 KiB

plaukimo_varzybos

#include <bits/stdc++.h>

typedef long long ll;
using namespace std;

const int maxN = 1e6+10;
const int inf = 2147000000;

int n, mini, maxi;
int a[maxN];
int dp[maxN];

bool test(int v){

    fill(dp, dp+maxN, 0);

    dp[0]=1;

    int i, j;
    for(i = 0; i < n; i++){
        if(i>1)dp[i]+=dp[i-1];
        if(dp[i]<=0)continue;
        j=i;
        while(j<n&&a[j]-a[i]<=v)j++;

        if(i+mini<=min(i+maxi, j)){
            dp[i+mini]++;
            dp[min(i+maxi, j)+1]--;
        }
    }

    dp[n]+=dp[n-1];
    return dp[n]>0;
}

int solve(){

    int ans=inf;

    int l = 0, h = inf;

    while(l<h){
        int mid = l+((h-l)/2);
        //cout<<l<<" "<<mid<<" "<<h<<" "<<test(mid)<<endl;
        if(test(mid))h=mid;
        else l=mid+1;
    }

    return l;

}

int main()
{

    ios_base::sync_with_stdio(0);cin.tie(nullptr);

    cin>>n>>mini>>maxi;
    for(int i = 0; i < n; i++)cin>>a[i];
    sort(a, a+n);
    cout<<solve();

    return 0;
}

Compilation message (stderr)

plaukimo_varzybos.cpp: In function 'int solve()':
plaukimo_varzybos.cpp:38:9: warning: unused variable 'ans' [-Wunused-variable]
   38 |     int ans=inf;
      |         ^~~

• Subtask 1: 0 / 10
• Subtask 2: 20 / 20
• Subtask 3: 0 / 30
• Subtask 4: 0 / 40