Submission #1221320

#	Time	Username	Problem	Language	Result	Execution time	Memory
1221320		sula2	Advertisement 2 (JOI23_ho_t2)	C++20	10 / 100	282 ms	6108 KiB

Main

#include <bits/stdc++.h>
#define all(a) (a).begin(), (a).end()
using namespace std;

int main() {
    int n; cin >> n;
    pair<int,int> a[n];
    // x[j] - x[i] <= e[i] - e[j]
    // x[j] + e[j] <= e[i] + x[i]
    //
    // x[i] - x[j] <= e[i] - e[j]
    // e[j] - x[j] <= e[i] - x[i]
    //
    // X[j] <= X[i]
    // Y[j] <= Y[i]
    for (auto& [x, y] : a) {
        int pos, inf; cin >> pos >> inf;
        x = inf + pos;
        y = -(inf - pos);
    }
    sort(a, a+n, greater<>());
    deque<int> lis;
    for (auto [x, y] : a) {
        y = -y;
        auto it = lower_bound(lis.rbegin(), lis.rend(), y);
        if (it == lis.rend())
            lis.push_front(y);
        else
            *it = y;
    }
    cout << lis.size();
}

• Subtask 1: 10 / 10
• Subtask 2: 0 / 23
• Subtask 3: 0 / 36
• Subtask 4: 0 / 31