Submission #481742

#	Time	Username	Problem	Language	Result	Execution time	Memory
481742		Lobo	Collecting Stamps 3 (JOI20_ho_t3)	C++17	0 / 100	1 ms	204 KiB

ho_t3

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

const long long INFll = (long long) 1e18 + 10;
const int INFii = (int) 1e9 + 10;
typedef long long ll;
typedef int ii;
typedef long double dbl;
#define endl '\n'
#define sc second
#define fr first
#define mp make_pair
#define pb push_back
#define all(x) x.begin(), x.end()

#define maxn 220

ii n, l, t[maxn], x[maxn];

int main() {
    ios::sync_with_stdio(false); cin.tie(0);

    //freopen("in.in", "r", stdin);
    //freopen("out.out", "w", stdout);

    cin >> n >> l;

    for(ii i = 1; i <= n; i++) {
        cin >> x[i];
    }

    vector<ii> v1,v2;
    for(ii i = 1; i <= n; i++) {
        cin >> t[i];
    }

    ii ans = 0;

    //sentido normal
    for(ii i = 0; i <= n; i++) {
        ii ans1 = 0;
        for(ii j = 1; j <= i; j++) {
            if(x[j] <= t[j]) ans1++;
        }

        for(ii j = i+1; j <= n; j++) {
            if(2*x[i]+ (l-x[j]) <= t[j]) ans1++;
        }

        ans = max(ans,ans1);
    }

    //inverto o sentido
    for(ii i = 1; i <= n; i++) {
        x[i] = l-x[i];
    }

    reverse(x+1,x+1+n);
    reverse(t+1,t+1+n);

    //sentido inverso
    //sentido normal
    for(ii i = 0; i <= n; i++) {
        ii ans1 = 0;
        for(ii j = 1; j <= i; j++) {
            if(x[j] <= t[j]) ans1++;
        }

        for(ii j = i+1; j <= n; j++) {
            if(2*x[i]+ (l-x[j]) <= t[j]) ans1++;
        }

        ans = max(ans,ans1);
    }

    cout << ans << endl;

}

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