oj.uz

Submission #71923

# Submission time Handle Problem Language Result Execution time Memory
71923 2018-08-25T21:10:50 Z XmtosX Shortcut (IOI16_shortcut) C++17
0 / 100
 2 ms 376 KB 
#include <bits/stdc++.h>
#include "shortcut.h"
using namespace std;
const int N=502;
long long dis[N][N],mx[N][N],mx1[N][N];
long long find_shortcut(int n, vector<int> l, vector<int> d, int c)
{
    if (n>500)
        return 0;
    for (int i=0;i<n;i++)
    {
            mx[i][i]=d[i];
            mx1[i][i]=d[i];
    }
    for (int i=0;i<n;i++)
    {
        for (int j=i+1;j<n;j++)
        {
            dis[i][j]=dis[i][j-1]+l[j-1];
            mx[i][j]=max(mx[i][j-1],dis[i][j]+d[j]);
        }
    }
    for (int i=0;i<n;i++)
    {
        for (int j=i-1;j>=0;j--)
        {
            mx1[j][i]=max(mx1[j+1][i],dis[j][i]+d[j]);
        }
    }
    long long ans=1e18;
    for (int i=0;i<n;i++)
    {
        for (int j=i+1;j<n;j++)
        {
            long long maxx=0;
            for (int q=0;q<n;q++)
            {
                long long cur=0;
                if (q==j)
                {
                    cur= mx[j][n-1];
                }
                else if (q<=j)
                    cur= d[q]+mx[j][n-1]+(min(dis[q][j],dis[i][q]+c));
                if (q==i)
                    cur= mx1[0][i];
                else if (q>=i)
                    cur= max(cur,d[q]+mx1[0][i]+min(dis[i][q],dis[q][j]+c));
                if (q>=i&&q<=j&&dis[q][j]+c<dis[i][q])
                {
                    int low=i,high=q-1,mid;
                    long long x=dis[q][j]+c;
                    while (low<=high)
                    {
                        mid= (low+high)/2;
                        if (x+dis[i][mid]<dis[mid][q])
                        {
                            cur=max(cur,x+dis[i][mid]+d[mid]+d[q]);
                            low=mid+1;
                        }
                        else
                        {
                            high=mid-1;
                            cur=max(cur,dis[mid][q]+d[q]+d[mid]);
                        }
                    }
                }
                if (i==0&&j==2)
                    cout <<cur<<endl;
                maxx=max(maxx,cur);
            }
            ans=min(ans,maxx);
        }
    }
    return ans;
}

Subtask #1
0 / 9.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 376 KB Secret is incorrect!
2 Halted 0 ms 0 KB -

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 376 KB Secret is incorrect!
2 Halted 0 ms 0 KB -

Subtask #3
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 376 KB Secret is incorrect!
2 Halted 0 ms 0 KB -

Subtask #4
0 / 7.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 376 KB Secret is incorrect!
2 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 376 KB Secret is incorrect!
2 Halted 0 ms 0 KB -

Subtask #6
0 / 22.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 376 KB Secret is incorrect!
2 Halted 0 ms 0 KB -

Subtask #7
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 376 KB Secret is incorrect!
2 Halted 0 ms 0 KB -

Subtask #8
0 / 3.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 376 KB Secret is incorrect!
2 Halted 0 ms 0 KB -