Submission #854769

#	Time	Username	Problem	Language	Result	Execution time	Memory
854769		annabeth9680	Arcade (NOI20_arcade)	C++17	100 / 100	200 ms	26568 KiB

Arcade

#include <bits/stdc++.h>
#define int long long
#define f first
#define s second
using namespace std;
const int MAXN = 5*1e5+20;
int arr[MAXN], t[MAXN];
int32_t main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int N,M; cin >> N >> M;
    vector<pair<int,int>> vec;
    for(int i = 0;i<M;++i) cin >> t[i];
    for(int i = 0;i<M;++i) cin >> arr[i];
    for(int i = 0;i<M;++i) vec.push_back({t[i]-arr[i],t[i]+arr[i]});
    sort(vec.begin(),vec.end());
    set<int> sums; sums.insert((1LL<<60));
    for(int i = 0;i<M;++i){
        auto it = sums.upper_bound(vec[i].s);
        if(it != sums.begin()){
            --it;
            sums.erase(it);
            sums.insert(vec[i].s);
        }
        else{
            sums.insert(vec[i].s);
        }
    }
    cout << sums.size()-1 << "\n";
    return 0;
}

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