Submission #924114

#	Time	Username	Problem	Language	Result	Execution time	Memory
924114		pcc	Lightning Rod (NOI18_lightningrod)	C++14	80 / 100	2019 ms	247800 KiB

Main

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

#define ll long long
#define pll pair<ll,ll>
#define pii pair<int,int>
#define fs first
#define sc second
#define tlll tuple<ll,ll,ll>


const int mxn = 1e7+10;
pii arr[mxn];
int N;

int main(){
	ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin>>N;
	for(int i = 0;i<N;i++){
		cin>>arr[i].fs>>arr[i].sc;
		arr[i] = make_pair(arr[i].fs-arr[i].sc,arr[i].fs+arr[i].sc);
	}
	sort(arr,arr+N,[](pii &a,pii &b){return a.fs == b.fs?a.sc>b.sc:a.fs<b.fs;});
	int ans = 0,big = INT_MIN;
	for(int i = 0;i<N;i++){
		//cout<<arr[i].fs<<','<<arr[i].sc<<' ';
		ans += (big<arr[i].sc);
		big = max(big,arr[i].sc);
	}
	cout<<ans;
}

• 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: 0 / 20