제출 #1196802

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1196802		loom	Lightning Rod (NOI18_lightningrod)	C++20	100 / 100	528 ms	234324 KiB

Main

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

inline int readInt() {
    int x = 0;
    char ch = getchar();
    while (ch < '0' || ch > '9') ch = getchar_unlocked();
    while (ch >= '0' && ch <= '9'){
		x = (x << 3) + (x << 1) + ch - '0';
		ch = getchar_unlocked();
	}
    return x;
}

signed main(){
	int n = readInt();
	vector<pair<int,int>> a(n);
	for(int i = 0; i < n; i++) {
		a[i].first = readInt();
		a[i].second = readInt();

      if(i > 0 and a[i].first == a[i-1].first) cout<<"haha";
	}

    int ans = n;
    int mx = -1;
    vector<int> tf(n, 0);
    for(int i=0; i<n; i++){
        auto [x, y] = a[i];

        if(x+y <= mx) ans--, tf[i] = 1;
        else mx = x+y;
    }
    int mn = 1e18;
    for(int i=n-1; i>=0; i--){
        if(tf[i]) continue;
        auto [x, y] = a[i];

        if(x-y >= mn) ans--;
        else mn = x-y;
    }

    cout<<ans;
	return 0;
}

• Subtask 1: 4 / 4
• Subtask 2: 7 / 7
• Subtask 3: 12 / 12
• Subtask 4: 21 / 21
• Subtask 5: 26 / 26
• Subtask 6: 10 / 10
• Subtask 7: 20 / 20