Submission #1071449

#	Time	Username	Problem	Language	Result	Execution time	Memory
1071449		vjudge1	Collecting Stamps 3 (JOI20_ho_t3)	C++17	0 / 100	0 ms	348 KiB

ho_t3

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

signed main() {
    int n, l, ans = 0;
    cin >> n >> l;
    int a[n+10], b[n+10], x[n+10];

    for(int i = 1; i <= n; i++) {
        cin >> a[i];
    }
    a[0] = 0;
    for(int i = 1; i <= n; i++) cin >> x[i];
    int gg = n;
    for(int i = 1; i <= n; ++i) {
        b[gg] = fabs(l - a[i]);
        gg--;
    }
    b[n+1] = 0;
    b[0] = 0;

    int dex = 0;
    for(int i = 0; i <= n; i++) {
        int cnt = 0;
        dex += b[i];
        if(dex <= x[n - (i - 1)]) cnt++;
        int gs = dex * 2;
        for(int j = 1; j <= n - i; j++) {
            gs += fabs(a[j-1] - a[j]);
            cnt += (gs <= x[i]);
        }
        ans = max(ans, cnt);
    }
    dex = 0;
    for(int i = 0; i <= n; i++) {   
        int cnt = 0;
        dex += a[i];
        if(dex <= x[i]) cnt++;
        int gs = dex * 2;
        for(int j = n; j >= 1 + i; j--) {
            gs += fabs(b[j + 1] - b[j]);
            cnt += (gs <= x[j]);
            ans = max(ans, cnt);
        }
    }

    cout << ans << endl;

}

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