Submission #875598

#	Time	Username	Problem	Language	Result	Execution time	Memory
875598		hmm789	Advertisement 2 (JOI23_ho_t2)	C++14	100 / 100	133 ms	29704 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define INF 1000000000000000000
#define MOD 998244353
 
int32_t main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    int n, ans = 1, idx = 0;
    cin >> n;
    int x[n], e[n], b[n];
    pair<int, int> a[n];
    for(int i = 0; i < n; i++) {
        cin >> x[i] >> e[i];
        a[i] = {x[i]+e[i], i};
    }
    sort(a, a+n);
    for(int i = 0; i < n; i++) b[i] = INF;
    for(int i = 0; i < n; i++) {
        b[idx] = min(b[idx], x[a[i].second]-e[a[i].second]);
        if(i == n-1 || a[i].first != a[i+1].first) idx++;
    }
    for(int i = idx-2; i >= 0; i--) b[i] = min(b[i], b[i+1]);
    for(int i = 0; i < idx-1; i++) if(b[i] < b[i+1]) ans++;
    cout << ans;
}

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