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Submission #16229

# Submission time Handle Problem Language Result Execution time Memory
16229 2015-08-18T10:22:38 Z eaststar 전봇대 (KOI13_pole) C++14
100 / 100
 32 ms 1472 KB 
#include <stdio.h>
#include <stdlib.h>
int a[100010],n;
long long f(int x){
    long long i,s=0;
    for(i=1;i<n;++i)s+=llabs(i*x-a[i]);
    return s;
}
int main(){
    int i,l=1,r,m;
    long long ans;
    scanf("%d",&n);
    for(i=0;i<n;++i)scanf("%d",a+i);
    r=1e9/n;
    while(l<=r){
        m=(l+r)/2;
        ans=f(m);
        if(f(m-1)<ans)r=m-1;
        else if(f(m+1)<ans)l=m+1;
        else break;
    }
    printf("%lld",ans);
    return 0;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 1472 KB Output is correct
2 Correct 0 ms 1472 KB Output is correct
3 Correct 0 ms 1472 KB Output is correct
4 Correct 0 ms 1472 KB Output is correct
5 Correct 0 ms 1472 KB Output is correct
6 Correct 0 ms 1472 KB Output is correct
7 Correct 0 ms 1472 KB Output is correct
8 Correct 0 ms 1472 KB Output is correct
9 Correct 0 ms 1472 KB Output is correct
10 Correct 0 ms 1472 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 1472 KB Output is correct
2 Correct 0 ms 1472 KB Output is correct
3 Correct 0 ms 1472 KB Output is correct
4 Correct 0 ms 1472 KB Output is correct
5 Correct 0 ms 1472 KB Output is correct
6 Correct 0 ms 1472 KB Output is correct
7 Correct 0 ms 1472 KB Output is correct
8 Correct 0 ms 1472 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 1472 KB Output is correct
2 Correct 0 ms 1472 KB Output is correct
3 Correct 0 ms 1472 KB Output is correct
4 Correct 0 ms 1472 KB Output is correct
5 Correct 3 ms 1472 KB Output is correct
6 Correct 0 ms 1472 KB Output is correct

Subtask #4
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 1472 KB Output is correct
2 Correct 32 ms 1472 KB Output is correct
3 Correct 31 ms 1472 KB Output is correct
4 Correct 24 ms 1472 KB Output is correct
5 Correct 20 ms 1472 KB Output is correct
6 Correct 30 ms 1472 KB Output is correct