Submission #880459

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
880459	2023-11-29T13:00:09 Z	mkolko	Railway Trip 2 (JOI22_ho_t4)	C++14	0 / 100	2000 ms	25180 KB

Main

#include <iostream>
using namespace std;

const int base=(1<<21);

int tree[base*2+7];

int dp[base][30][2];



int main()
{
    int n, m, k, q, p, p2, str, odp;
    cin>>n>>k;
    for(int a=0; a<=21; a++)
    {
        for(int i=0; i<=n; i++){
            dp[i][a][0]=i;
            dp[i][a][1]=i;
        }
    }
    cin>>m;
    for(int a=0; a<m; a++)
    {
        cin>>p>>p2;
        if(p<=p2){
            for(int i=0; i<p2-p+1 && i<k; i++)
                dp[p+i][0][1]=max(dp[p+i][0][1], p2);
        }
        else{
            for(int i=0; i<p-p2+1 && i<k; i++)
                dp[p-i][0][0]=min(dp[p-i][0][0], p2);
        }
    }
    for(int a=1; a<=20; a++)
    {
        for(int i=1; i<=n; i++)
            dp[i][a][1]=max(max(dp[dp[i][a-1][1]][a-1][1], dp[dp[i][a-1][0]][a-1][1]), dp[i][a-1][1]);
        for(int i=1; i<=n; i++)
            dp[i][a][0]=min(min(dp[dp[i][a-1][0]][a-1][0], dp[dp[i][a-1][1]][a-1][0]), dp[i][a-1][0]);
    }

    /*for(int a=0;  a<=n; a++)
    {
        for(int i=0; i<=n; i++)
            cout<<dp[a][i][1]<<" ";
        cout<<"\n";
    }
    cout<<"\n\n";
    for(int a=0;  a<=n; a++)
    {
        for(int i=0; i<=n; i++)
            cout<<dp[a][i][0]<<" ";
        cout<<"\n";
    }*/

    cin>>q;
    for(int a=0; a<q; a++)
    {
        cin>>p>>p2;
        if(p<p2)
        {
            odp=0;
            for(int i=20; i>=0; i--){
                if(dp[p][i][1]<p2){
                    odp=odp+(1<<(i));
                    p=dp[p][i][1];
                }
            }
        }
        else
        {
            odp=0;
            for(int i=20; i>=0; i--){
                if(dp[p][i][0]>p2){
                    odp=odp+(1<<(i));
                    p=dp[p][i][0];
                }
            }
        }
        if(p!=p2)
            odp++;
        if(odp>=(1<<21))
            cout<<-1<<"\n";
        else
            cout<<odp<<" "<<"\n";
    }
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:14:28: warning: unused variable 'str' [-Wunused-variable]
   14 |     int n, m, k, q, p, p2, str, odp;
      |                            ^~~

Subtask #1
0 / 8.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	1 ms	348 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #2
0 / 8.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	1 ms	348 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #3
0 / 11.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	62 ms	25180 KB	Output is correct
2	Correct	64 ms	25180 KB	Output is correct
3	Correct	70 ms	25176 KB	Output is correct
4	Correct	59 ms	25180 KB	Output is correct
5	Execution timed out	2072 ms	25180 KB	Time limit exceeded
6	Halted	0 ms	0 KB	-