Submission #689701

#	Time	Username	Problem	Language	Result	Execution time	Memory
689701		saayan007	Arcade (NOI20_arcade)	C++17	0 / 100	1 ms	340 KiB

Arcade

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

using ll = long long;
using pi = pair<int, int>;
using pl = pair<long long, long long>;
using vi = vector<int>;
using vl = vector<long long>;
using vpi = vector<pair<int, int>>;
using vpl = vector<pair<long long, long long>>;

#define fur(i, a, b) for(ll i = a; i <= (ll)b; ++i)
#define ruf(i, a, b) for(ll i = a; i >= (ll)b; --i)
#define fr first 
#define sc second
#define mp make_pair
#define pb push_back
#define eb emplace_back
#define nl "\n"
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()

const ll mxm = 5e5L;
ll n, m;
ll t[mxm];
ll a[mxm];

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

    cin >> n >> m;
    fur(i, 1, m) {
        cin >> t[i];
    }
    fur(i, 1, m) {
        cin >> a[i];
    }

    ll order[m + 1];
    fur(i, 1, m) {
        order[i] = i;
    }
    sort(order + 1, order + m + 1, [&](ll lt, ll rt) {
        return t[lt] < t[rt];
    });

    bool one = 1;
    fur(rep, 2, m) {
        ll i = order[rep];
        ll j = order[rep - 1];
        if(abs(t[i] - t[j]) < abs(a[i] - a[j])) {
            one = 0;
        }
    }
    if(one) {
        cout << 1 << nl;
        return 0;
    }

    ll s[m + 1];
    fur(i, 1, m) {
        s[i] = a[i];
    }
    sort(s + 1, s + m + 1);
    s[0] = -1;

    fur(i, 0, m) {
        ll cur_l = -1;
        ll tim_l = 0;
        ll cur_r = -1;
        ll tim_r = 0;

        bool two = 1;
        fur(rep, 1, m) {
            ll j = order[rep];
            if(a[j] <= s[i]) { // left hand
                if(cur_l == -1) {
                    cur_l = a[j];
                    tim_l = t[j];
                } 
                else if(abs(t[j] - tim_l) < abs(a[j] - cur_l) ) {
                    two = 0;
                    break;
                } else {
                    cur_l = a[j];
                    tim_l = t[j];
                }
            } 

            else { // right hand
                if(cur_r == -1) {
                    cur_r = a[j];
                    tim_r = t[j];
                }
                else if(abs(t[j] - tim_r) < abs(a[j] - cur_r) ) {
                    two = 0;
                    break;
                } else {
                    cur_r = a[j];
                    tim_r = t[j];
                }
            }

        }

        if(two) {
            cout << 2 << nl;
            return 0;
        }
    }
    cout << 3 << nl;
    return 0;
}

• Subtask 1: 0 / 7
• Subtask 2: 0 / 11
• Subtask 3: 0 / 12
• Subtask 4: 0 / 21
• Subtask 5: 0 / 14
• Subtask 6: 0 / 20
• Subtask 7: 0 / 15