Submission #20172

#	Time	Username	Problem	Language	Result	Execution time	Memory
20172		suhgyuho_william	정전 (OJUZ10_blackout)	C++98	100 / 100	50 ms	2256 KiB

blackout

#include <stdio.h>
#include <algorithm>

using namespace std;

#define lld long long

int N;
lld a[150010],L;
lld ans;

int main(){
    int i;
    lld e,s;
	//freopen("input.txt","r",stdin);

	scanf("%d %lld",&N,&L);
	for(i=1; i<=N; i++) scanf("%lld",&a[i]);
	sort(a+1,a+N+1);

	for(i=2; i<=N; i++){
		e = a[i-1]+L;
		s = a[i]-L;
		if(e <= s) continue;
		if(i > 2) s = max(s,a[i-2]+L);
		ans += (e-s);
	}
	printf("%lld",ans);

	return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 30 / 30
• Subtask 4: 40 / 40