제출 #733803

#제출 시각아이디문제언어결과실행 시간메모리
733803vjudge1Lightning Rod (NOI18_lightningrod)C++17
14 / 100
1600 ms112648 KiB
#include<bits/stdc++.h>
using namespace std;
#define int long long

int n, x, y, sx, sy, ans = 1;

void sol() {
	if(sx + sy >= x + y) {
		return;
	}
	if(max(sx, sy) - min(sx, sy) < max(x, y) - min(x, y)) {
		ans++;
	}
	sx = x;
	sy = y;
	return;
}

signed main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
	    
	cin >> n;
	cin >> x >> y;
	sx = x;
	sy = y;
	for(int i = 1; i < n; i++) {
		cin >> x >> y;
		sol();
	}
	cout << ans;
	return 0;
}
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