Submission #13973

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
13973	2015-04-24 17:14:10	kriii	정전 (OJUZ10_blackout)	C++14	100 / 100	51 ms	1668 KiB

blackout

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#include <stdio.h>
#include <algorithm>
using namespace std;
int N,L,X[150005];
int main()
{
  scanf ("%d %d",&N,&L);
  for (int i=0;i<N;i++) scanf ("%d",&X[i]);
  sort(X,X+N);
  int al = 0x80000000, bl = 0x80000000;
  long long ans = 0;
  for (int i=0;i<N;i++){
    if (i % 2){
      int s = X[i] - L;
      if (al >= s) s = al;
      if (s <= bl) ans += bl - s;
      al = X[i] + L;
    }
    else{
      int s = X[i] - L;
      if (bl >= s) s = bl;
      if (s <= al) ans += al - s;
      bl = X[i] + L;
    }
  }
  printf ("%lld\n",ans);
 
 
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• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 30 / 30
• Subtask 4: 40 / 40