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16 lines
401 B
C++
16 lines
401 B
C++
#include <bits/stdc++.h>
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using namespace std;
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const int N = 1e5 + 50;
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int a[N];
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int main()
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{
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int n, k;
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scanf("%d%d", &n, &k);
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for (int i = 0; i < n; i++)
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scanf("%d", a + i);
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int ans = 0x3f3f3f3f;
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for (int i = 0; i <= n - k; i++)
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ans = min(ans, min(abs(a[i]) + a[i + k - 1] - a[i], abs(a[i + k - 1]) + a[i + k - 1] - a[i]));
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printf("%d", ans);
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return 0;
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} |