#include<bits/stdc++.h>
#define int long long
using namespace std;
signed main()
{
ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
int n; cin>>n;
int a[n],x[n],y[n]; for(int i=0;i<n;i++) cin>>a[i];
for(int i=0;i<n-1;i++)
{
if(a[i]>=a[i+1]) x[i]=a[i]-a[i+1]+1;
else x[i]=0;
if(i) x[i]+=x[i-1];
} y[n-1]=0;
for(int i=n-2;i>=0;i--)
{
if(a[i]<=a[i+1]) y[i]=a[i+1]-a[i]+1;
else y[i]=0;
y[i]+=y[i+1];
}
int ans=min(x[n-2],y[0]);
for(int i=1;i<n;i++) ans=min(ans,x[i-1]+y[i]);
cout<<ans<<endl;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
344 KB |
Output is correct |
3 |
Correct |
1 ms |
348 KB |
Output is correct |
4 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
5 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
344 KB |
Output is correct |
3 |
Correct |
1 ms |
348 KB |
Output is correct |
4 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
5 |
Halted |
0 ms |
0 KB |
- |