Submission #2767678


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#include <bits/stdc++.h>
#define int long long
#define ff first
#define dd second
#define mp make_pair
#define pb push_back
#define pp pair<int,int>
#define N 200007 // check
#define K 13
using namespace std;

int n;

int tab[N];

int32_t main() {
    ios_base::sync_with_stdio(false);
    cin >> n;
    for(int i = 0; i < n; ++i) {
        cin >> tab[i];
        tab[i] -= i+1;
    }

    int best = 1e17;

    sort(tab, tab+n);

    int val = 0;
    int cur = tab[0];
    for(int i = 0; i < n; ++i) {
        val += tab[i]-cur;
    }

    best = val;

    int last = cur;

    for(int i = 0; i < n; ) {
        while(i < n and tab[i] == last)++i;
        if(i == n) break;
        val += (tab[i]-last)*i;
        val -= (n-i)*(tab[i]-last);
        last = tab[i];
        best = min(best, val);
    }
    cout << best << endl;

}

Submission Info

Submission Time
Task C - Linear Approximation
User atszcoder
Language C++14 (GCC 5.4.1)
Score 300
Code Size 878 Byte
Status AC
Exec Time 35 ms
Memory 1792 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 300 / 300
Status
AC × 4
AC × 19
Set Name Test Cases
Sample sample_01.txt, sample_02.txt, sample_03.txt, sample_04.txt
All sample_01.txt, sample_02.txt, sample_03.txt, sample_04.txt, sample_01.txt, sample_02.txt, sample_03.txt, sample_04.txt, subtask_1_01.txt, subtask_1_02.txt, subtask_1_03.txt, subtask_1_04.txt, subtask_1_05.txt, subtask_1_06.txt, subtask_1_07.txt, subtask_1_08.txt, subtask_1_09.txt, subtask_1_10.txt, subtask_1_11.txt
Case Name Status Exec Time Memory
sample_01.txt AC 1 ms 256 KB
sample_02.txt AC 1 ms 256 KB
sample_03.txt AC 1 ms 256 KB
sample_04.txt AC 1 ms 256 KB
subtask_1_01.txt AC 1 ms 256 KB
subtask_1_02.txt AC 7 ms 512 KB
subtask_1_03.txt AC 5 ms 512 KB
subtask_1_04.txt AC 12 ms 1024 KB
subtask_1_05.txt AC 21 ms 1664 KB
subtask_1_06.txt AC 23 ms 1792 KB
subtask_1_07.txt AC 35 ms 1792 KB
subtask_1_08.txt AC 25 ms 1792 KB
subtask_1_09.txt AC 24 ms 1792 KB
subtask_1_10.txt AC 24 ms 1792 KB
subtask_1_11.txt AC 24 ms 1792 KB