Submission #498041

#	Time	Username	Problem	Language	Result	Execution time	Memory
498041		Karabasan	Watching (JOI13_watching)	C++17	0 / 100	202 ms	262148 KiB

watching

#include <bits/stdc++.h>
#define ll long long
#define fast1 ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define endl "\n"
using namespace std;
#pragma GCC optimize("Ofast")
#pragma GCC target("fma,sse,sse2,sse3,avx")
#pragma GCC optimize("unroll-loops")

int n,m,k;
int dizi[1005];
int dp[2005][2005];
int dps(int x,int y,int z)
{
    if(x>n)
        return 0;
    if(y>m)
        return 999999999;
    if(dp[x][y]!=-1)
        return dp[x][y];
    int a=upper_bound(dizi+1,dizi+n+1,dizi[x]+z-1)-dizi;
    int b=upper_bound(dizi+1,dizi+n+1,dizi[x]+2*z-1)-dizi;
    int kucuk=dps(a,y+1,z);
    int buyuk=dps(b,y,z)+1;
    return dp[x][y]=min(kucuk,buyuk);
}
int f(int x)
{
    memset(dp,-1,sizeof dp);
    dp[n][n]=0;
    dps(1,0,x);
    for(int j=0;j<=m;j++)
    {
        if(dp[n][j]<=k)
            return 1;
    }
    return 0;
}
void solve()
{
    cin>>n>>m>>k;
    for(int i=1;i<=n;i++)
        cin>>dizi[i];
    sort(dizi+1,dizi+1+n);
    int bas=0;
    int son=1e9;
    while(bas<son)
    {
        int orta=(bas+son)/2;
        if(f(orta)==1)
            son=orta;
        else bas=orta+1;
    }
    cout<<bas<<endl;
}
signed main()
{
    fast1
    //freopen ("lca.gir","r",stdin);
    //freopen ("lca.cik","w",stdout);
    int t=1;
    //cin>>t;
    while(t--)
    {
        solve();
    }
    return 0;
}

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