Submission #750559

#	Time	Username	Problem	Language	Result	Execution time	Memory
750559		Sami_Massah	Collecting Stamps 3 (JOI20_ho_t3)	C++17	0 / 100	17 ms	37588 KiB

ho_t3

#include <bits/stdc++.h>
using namespace std;



const int maxn = 200 + 12, inf = 1e9 + 12;
int n, L, dist[maxn], t[maxn], dp[maxn][maxn][maxn];
int find_ans(int a, int b, int c){
    if(c < 0)
        return inf;
    if(dp[a][b][c] != -1)
        return dp[a][b][c];
//    cout << a << ' ' << b << ' ' << c << endl;
    dp[a][b][c] = inf;
    if(a < b){
        if(a != 0){
            dp[a][b][c] = min(dp[a][b][c], find_ans(a - 1, b, c) + abs(dist[a] - dist[a - 1]));
            int x = find_ans(a - 1, b, c - 1) + abs(dist[a] - dist[a - 1]);
            if(x <= t[a])
                dp[a][b][c] = min(dp[a][b][c], x);
        }
        if(a != 0){
            dp[a][b][c] = min(dp[a][b][c], find_ans(b, a - 1, c) + abs(L - dist[b]) + dist[a]);
            int x = find_ans(b, a - 1, c - 1) + abs(L - dist[b]) + dist[a];
            if(x <= t[a])
                dp[a][b][c] = min(dp[a][b][c], x);
    }
    }
    else if(a > b){
        if(a != n){
            dp[a][b][c] = min(dp[a][b][c], find_ans((a + 1) % n, b, c) + abs(dist[(a + 1) % n] - dist[a]));
            int x = find_ans((a + 1) % n, b, c - 1) + abs(dist[(a + 1) % n] - dist[a]);
            if(x <= t[a])
                dp[a][b][c] = min(dp[a][b][c], x);
        }
        if(a != n){
            dp[a][b][c] = min(dp[a][b][c], find_ans(b, (a + 1) % n, c) + dist[b] + abs(L - dist[a]));
            int x = find_ans(b, (a + 1) % n, c - 1) + dist[b] + abs(L - dist[a]);
            if(x <= t[a])
                dp[a][b][c] = min(dp[a][b][c], x);
    }
    }
   // if(dp[a][b][c] != inf && c == 5)
     //   cout << a << ' ' << b << ' ' << c << ' ' << dp[a][b][c] << endl;
    return dp[a][b][c];

}
int main(){
    ios_base::sync_with_stdio(false), cin.tie(0);
    memset(dp, -1, sizeof dp);
    cin >> n >> L;

    for(int i = 1; i <= n; i++)
        cin >> dist[i];
    for(int i = 1; i <= n; i++)
        cin >> t[i];
    dist[0] = 0;
    t[0] = 0;
    n += 1;
    dp[0][0][1] = 0;
    dp[0][0][0] = 0;
    int ans = 0;

    for(int i = 0; i <= n; i++)
        for(int j = 0; j <= n; j++)
            for(int c = 0; c <= n; c++){
                dp[i][j][c] = find_ans(i, j, c);
                if(dp[i][j][c] < inf)
                    ans = max(ans, c);
            }
    cout << ans - 1 << endl;

}

Compilation message (stderr)

ho_t3.cpp: In function 'int main()':
ho_t3.cpp:67:27: warning: array subscript -1 is below array bounds of 'int [212]' [-Warray-bounds]
   67 |                 dp[i][j][c] = find_ans(i, j, c);
      |                 ~~~~~~~~~~^

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 75