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Submission #757886

# Submission time Handle Problem Language Result Execution time Memory
757886 2023-06-13T21:32:02 Z jasmin Collecting Stamps 3 (JOI20_ho_t3) C++14
0 / 100
 60 ms 145284 KB 
#include<bits/stdc++.h>
using namespace std;
#define int long long

const int N=210;
int dp[N][N][N][2];

const int INF=1e15;

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    int n, tot;
    cin >> n >> tot;

    vector<int> x(n+2);
    x[0]=0; x[n+1]=tot;
    for(int i=1; i<=n; i++){
        cin >> x[i];
    }

    vector<int> t(n+2);
    t[0]=-1; t[n+1]=-1;
    for(int i=1; i<=n; i++){
        cin >> t[i];
    }


    //initialize
    for(int i=0; i<N; i++){
        for(int j=0; j<N; j++){
            for(int k=0; k<N; k++){
                for(int x=0; x<2; x++){
                    dp[i][j][k][x]=INF;
                }
            }
        }
    }
    dp[0][0][0][0]=0;
    dp[0][0][0][1]=0;

    for(int l=0; l<n; l++){
        for(int r=0; r<n; r++){
            if(l+r>n) continue;

            for(int c=0; c<n; c++){

                for(int loc=0; loc<2; loc++){
                    int cor;
                    if(loc==0){
                        cor = x[n+1-l];
                    }
                    else{
                        cor = x[r];
                    }

                    //walk right
                    int distright = 0;
                    if(loc==0){
                        distright = (tot-cor) + x[r+1];
                    }
                    else{
                        distright = x[r+1] - cor;
                    }

                    dp[l][r+1][c][1] = min(dp[l][r+1][c][1], dp[l][r][c][loc] + distright);
                    dp[l][r+1][c][0] = min(dp[l][r+1][c][0], dp[l][r][c][loc] + 2*distright);
                    if( dp[l][r][c][loc] + distright <= t[r+1] ){

                        dp[l][r+1][c+1][1] = min( dp[l][r+1][c+1][1], dp[l][r][c][loc] + distright );
                        dp[l][r+1][c+1][0] = min( dp[l][r+1][c+1][0], dp[l][r][c][loc] + 2*distright);
                    }


                    //walk left
                    int distleft=0;
                    if(loc==0){
                        distleft = cor - x[n+1 - (l+1)];
                    }
                    else{
                        distleft = tot - x[n+1 - (l+1)] + cor;
                    }

                    dp[l+1][r][c][0] = min(dp[l+1][r][c][0], dp[l][r][c][loc] + distleft);
                    dp[l+1][r][c][1] = min(dp[l+1][r][c][1], dp[l][r][c][loc] + 2*distleft);
                    if( dp[l][r][c][loc] + distleft <= t[n+1-(l+1)]){

                        dp[l+1][r][c+1][0] = min(dp[l+1][r][c+1][0], dp[l][r][c][loc] + distleft);
                        dp[l+1][r][c+1][1] = min(dp[l+1][r][c+1][1], dp[l][r][c][loc] + 2*distleft);
                    }

                }

            }
        }
    }

    //finding the largest one
    int ans=0;
    for(int i=0; i<=n; i++){
        for(int j=0; j<=n; j++){
            for(int k=0; k<=n; k++){
                //cout << i << " " << j << " " << k <<  ": " << dp[i][j][k][0] << ", " << dp[i][j][k][1] << "\n";

                for(int x=0; x<2; x++){


                    if(dp[i][j][k][x] != INF){
                        ans = max(ans, k);
                    }

                }
            }
        }
    }
    cout << ans << "\n";
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 145164 KB Output is correct
2 Correct 57 ms 145284 KB Output is correct
3 Correct 58 ms 145212 KB Output is correct
4 Correct 60 ms 145220 KB Output is correct
5 Correct 59 ms 145228 KB Output is correct
6 Correct 57 ms 145204 KB Output is correct
7 Correct 57 ms 145256 KB Output is correct
8 Correct 57 ms 145156 KB Output is correct
9 Correct 59 ms 145160 KB Output is correct
10 Correct 60 ms 145200 KB Output is correct
11 Correct 57 ms 145232 KB Output is correct
12 Correct 58 ms 145220 KB Output is correct
13 Incorrect 60 ms 145228 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 145164 KB Output is correct
2 Correct 57 ms 145284 KB Output is correct
3 Correct 58 ms 145212 KB Output is correct
4 Correct 60 ms 145220 KB Output is correct
5 Correct 59 ms 145228 KB Output is correct
6 Correct 57 ms 145204 KB Output is correct
7 Correct 57 ms 145256 KB Output is correct
8 Correct 57 ms 145156 KB Output is correct
9 Correct 59 ms 145160 KB Output is correct
10 Correct 60 ms 145200 KB Output is correct
11 Correct 57 ms 145232 KB Output is correct
12 Correct 58 ms 145220 KB Output is correct
13 Incorrect 60 ms 145228 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 145164 KB Output is correct
2 Correct 57 ms 145284 KB Output is correct
3 Correct 58 ms 145212 KB Output is correct
4 Correct 60 ms 145220 KB Output is correct
5 Correct 59 ms 145228 KB Output is correct
6 Correct 57 ms 145204 KB Output is correct
7 Correct 57 ms 145256 KB Output is correct
8 Correct 57 ms 145156 KB Output is correct
9 Correct 59 ms 145160 KB Output is correct
10 Correct 60 ms 145200 KB Output is correct
11 Correct 57 ms 145232 KB Output is correct
12 Correct 58 ms 145220 KB Output is correct
13 Incorrect 60 ms 145228 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #4
0 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 145164 KB Output is correct
2 Correct 57 ms 145284 KB Output is correct
3 Correct 58 ms 145212 KB Output is correct
4 Correct 60 ms 145220 KB Output is correct
5 Correct 59 ms 145228 KB Output is correct
6 Correct 57 ms 145204 KB Output is correct
7 Correct 57 ms 145256 KB Output is correct
8 Correct 57 ms 145156 KB Output is correct
9 Correct 59 ms 145160 KB Output is correct
10 Correct 60 ms 145200 KB Output is correct
11 Correct 57 ms 145232 KB Output is correct
12 Correct 58 ms 145220 KB Output is correct
13 Incorrect 60 ms 145228 KB Output isn't correct
14 Halted 0 ms 0 KB -