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Submission #7422

# Submission time Handle Problem Language Result Execution time Memory
7422 2014-08-05T05:47:28 Z gs13068 전봇대 (KOI13_pole) C++
100 / 100
 32 ms 1476 KB 
#include<cstdio>
#include<algorithm>

int a[100000],n;

long long calc(int x)
{
  int i;
  long long r=0;
  for(i=0;i<n;i++)r+=std::abs(a[i]-a[0]-1LL*i*x);
  return r;
}

int main()
{
  int l,r,mid;
  int i;
  scanf("%d",&n);
  for(i=0;i<n;i++)scanf("%d",&a[i]);
  l=1;r=1000000000;
  while(l<r)
  {
    mid=(l+r)/2;
    if(calc(mid)<calc(mid+1))r=mid;
    else l=mid+1;
  }
  printf("%lld",calc(l));
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 1476 KB Output is correct
2 Correct 0 ms 1476 KB Output is correct
3 Correct 0 ms 1476 KB Output is correct
4 Correct 0 ms 1476 KB Output is correct
5 Correct 0 ms 1476 KB Output is correct
6 Correct 0 ms 1476 KB Output is correct
7 Correct 0 ms 1476 KB Output is correct
8 Correct 0 ms 1476 KB Output is correct
9 Correct 0 ms 1476 KB Output is correct
10 Correct 0 ms 1476 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 1476 KB Output is correct
2 Correct 0 ms 1476 KB Output is correct
3 Correct 0 ms 1476 KB Output is correct
4 Correct 0 ms 1476 KB Output is correct
5 Correct 0 ms 1476 KB Output is correct
6 Correct 0 ms 1476 KB Output is correct
7 Correct 0 ms 1476 KB Output is correct
8 Correct 0 ms 1476 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 1476 KB Output is correct
2 Correct 0 ms 1476 KB Output is correct
3 Correct 4 ms 1476 KB Output is correct
4 Correct 4 ms 1476 KB Output is correct
5 Correct 4 ms 1476 KB Output is correct
6 Correct 4 ms 1476 KB Output is correct

Subtask #4
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 32 ms 1476 KB Output is correct
2 Correct 24 ms 1476 KB Output is correct
3 Correct 28 ms 1476 KB Output is correct
4 Correct 24 ms 1476 KB Output is correct
5 Correct 20 ms 1476 KB Output is correct
6 Correct 28 ms 1476 KB Output is correct