Submission #137653

#	Time	Username	Problem	Language	Result	Execution time	Memory
137653		ekrem	Lightning Rod (NOI18_lightningrod)	C++98	66 / 100	2062 ms	74832 KiB

Main

#include <bits/stdc++.h>
#define st first
#define nd second
#define mp make_pair
#define pb push_back
#define coc g[node][i]
#define sol (k+k)
#define sag (k+k+1)
#define orta ((bas+son)>>1)
#define mod 1000000007
#define inf 1000000009
#define N 10000005

using namespace std;

typedef long long ll;
typedef pair < int , int > ii;
typedef pair < double , double > dd;

int n;
ii a;
stack < ii > s;

int main(){
	// freopen("in.txt", "r", stdin);
	// freopen("out.txt", "w", stdout);
	scanf("%d",&n);
	for(int i = 1; i <= n; i++){
		scanf("%d %d",&a.st ,&a.nd);
		while(!s.empty() and abs(s.top().st - a.st) <= a.nd - s.top().nd)
			s.pop();
		if(!s.empty() and abs(s.top().st - a.st) <= s.top().nd - a.nd)
			continue;
		s.push(a);
	}
	printf("%d\n", (int)s.size());
	return 0;
}

Compilation message (stderr)

lightningrod.cpp: In function 'int main()':
lightningrod.cpp:27:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
  ~~~~~^~~~~~~~~
lightningrod.cpp:29:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d",&a.st ,&a.nd);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~

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