oj.uz

Submission #796009

# Submission time Handle Problem Language Result Execution time Memory
796009 2023-07-28T04:12:03 Z 이동현(#10071) Bitaro's travel (JOI23_travel) C++17
0 / 100
 13 ms 22380 KB 
#include <bits/stdc++.h>
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#define int long long
using namespace std;

const int NS = (int)2e5 + 4;
int n, q;
int a[NS];

unordered_map<int, int> dp[NS][2];

int sol(int l, int r, int dir){
    if(l == 0 && r == n - 1) return 0;
    if(dp[l][dir][r]) return dp[l][dir][r];

    int rv = 0;
    if(!dir){
        if(l && (r == n - 1 || a[l] - a[l - 1] <= a[r + 1] - a[l])){
            rv = a[l] - a[l - 1] + sol(l - 1, r, 0);
        }
        else{
            rv = a[r + 1] - a[l] + sol(l, r + 1, 1);
        }
    }
    else{
        if(l && (r == n - 1 || a[r] - a[l - 1] <= a[r + 1] - a[r])){
            rv = a[r] - a[l - 1] + sol(l - 1, r, 0);
        }
        else{
            rv = a[r + 1] - a[r] + sol(l, r + 1, 1);
        }
    }

    return (dp[l][dir][r] = rv);
}

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

    cin >> n;
    for(int i = 0; i < n; ++i){
        cin >> a[i];
    }
    cin >> q;
    while(q--){
        int x;
        cin >> x;

        int p = lower_bound(a, a + n, x) - a;

        if(p && x - a[p - 1] <= a[p] - x){
            --p;
        }

        cout << sol(p, p, 0) << '\n';
    }
    
    return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 22228 KB Output is correct
2 Incorrect 12 ms 22380 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 22228 KB Output is correct
2 Incorrect 12 ms 22380 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 22152 KB Output is correct
2 Correct 11 ms 22256 KB Output is correct
3 Incorrect 13 ms 22316 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 22228 KB Output is correct
2 Incorrect 12 ms 22380 KB Output isn't correct
3 Halted 0 ms 0 KB -