Submission #197939

#	Time	Username	Problem	Language	Result	Execution time	Memory
197939		popovicirobert	Lightning Rod (NOI18_lightningrod)	C++14	0 / 100	2025 ms	203908 KiB

Main

#include <bits/stdc++.h>
#define ll long long
#define ull unsigned long long
#define lsb(x) (x & (-x))
#define uint unsigned int


    
using namespace std;

const int MAXN = (int) 1e7;

int x[MAXN + 1], y[MAXN + 1];
int stk[MAXN + 1];
  
int main() {
#ifdef HOME
    ifstream cin("A.in");
    //ofstream cout("A.out");
#endif
	int i, n;
    ios::sync_with_stdio(false);
   	cin.tie(0), cout.tie(0);
	
	cin >> n;
	
	for(i = 1; i <= n; i++) {
		cin >> x[i] >> y[i];
	}	
	
	int sz = 0;
	for(i = 1; i <= n; i++) {
		while(sz > 0 && x[i] - x[stk[sz]] <= y[i] - y[stk[sz]]) {
			sz--;
		}
		stk[++sz] = i;
	}
	
	cout << sz;
	
	return 0;
}

• Subtask 1: 0 / 4
• Subtask 2: 0 / 7
• Subtask 3: 0 / 12
• Subtask 4: 0 / 21
• Subtask 5: 0 / 26
• Subtask 6: 0 / 10
• Subtask 7: 0 / 20