#include<bits/stdc++.h>
#define ll long long
#define pii pair<ll,ll>
#define f first
#define s second
#define pb push_back
#define all(x) x.begin(),x.end()
using namespace std;
int main() {
ios_base::sync_with_stdio(0);cin.tie(0);
int n;cin>>n;
ll a[n+1];
for(int i=1;i<=n;i++)cin>>a[i];
ll dpl[n+1];dpl[1]=0;
for(int i=2;i<=n;i++)dpl[i]=dpl[i-1]+(a[i-1]-a[i]>=0?a[i-1]-a[i]+1:0);
ll dpr[n+2]={0};dpr[n]=0;
for(int i=n-1;i>=1;i--)dpr[i]=dpr[i+1]+(a[i+1]-a[i]>=0?a[i+1]-a[i]+1:0);
ll ans=2e18;
for(int i=1;i<=n;i++)ans=min(ans,max(dpl[i],dpr[i]));
ll now[n+1];
for(int i=1;i<=n;i++)now[i]=a[i];
dpr[n]=0;ll cur=n-2,add=0;
queue<pii>q;
for(int i=n-1;i>=1;i--){
while(!q.empty()&&q.front().f>i)add-=q.front().s,q.pop();
now[i]+=add;
dpr[i]=dpr[i+1]+max(now[i+1]-now[i]+1,1ll*0);
int tt=max(now[i+1]-now[i]+1,1ll*0);
now[i]+=tt;
while(cur>0&&now[cur]<=now[i])q.push({cur--,tt}),add+=tt;
}
for(int i=1;i<=n-1;i++)ans=min(ans,dpl[i]+dpr[i+1]+max(now[i+1]-a[i]-dpl[i]+1,1ll*0));
cout<<ans;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
1 ms |
348 KB |
Output is correct |
| 6 |
Correct |
1 ms |
348 KB |
Output is correct |
| 7 |
Correct |
1 ms |
348 KB |
Output is correct |
| 8 |
Correct |
1 ms |
348 KB |
Output is correct |
| 9 |
Correct |
1 ms |
344 KB |
Output is correct |
| 10 |
Correct |
1 ms |
348 KB |
Output is correct |
| 11 |
Correct |
1 ms |
344 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
1 ms |
344 KB |
Output is correct |
| 14 |
Correct |
1 ms |
468 KB |
Output is correct |
| 15 |
Correct |
1 ms |
348 KB |
Output is correct |
| 16 |
Correct |
1 ms |
348 KB |
Output is correct |
| 17 |
Correct |
1 ms |
348 KB |
Output is correct |
| 18 |
Correct |
1 ms |
344 KB |
Output is correct |
| 19 |
Correct |
1 ms |
348 KB |
Output is correct |
| 20 |
Correct |
1 ms |
348 KB |
Output is correct |
| 21 |
Correct |
1 ms |
344 KB |
Output is correct |
| 22 |
Correct |
1 ms |
848 KB |
Output is correct |
| 23 |
Correct |
1 ms |
344 KB |
Output is correct |
| 24 |
Correct |
1 ms |
344 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
1 ms |
348 KB |
Output is correct |
| 6 |
Correct |
1 ms |
348 KB |
Output is correct |
| 7 |
Correct |
1 ms |
348 KB |
Output is correct |
| 8 |
Correct |
1 ms |
348 KB |
Output is correct |
| 9 |
Correct |
1 ms |
344 KB |
Output is correct |
| 10 |
Correct |
1 ms |
348 KB |
Output is correct |
| 11 |
Correct |
1 ms |
344 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
1 ms |
344 KB |
Output is correct |
| 14 |
Correct |
1 ms |
468 KB |
Output is correct |
| 15 |
Correct |
1 ms |
348 KB |
Output is correct |
| 16 |
Correct |
1 ms |
348 KB |
Output is correct |
| 17 |
Correct |
1 ms |
348 KB |
Output is correct |
| 18 |
Correct |
1 ms |
344 KB |
Output is correct |
| 19 |
Correct |
1 ms |
348 KB |
Output is correct |
| 20 |
Correct |
1 ms |
348 KB |
Output is correct |
| 21 |
Correct |
1 ms |
344 KB |
Output is correct |
| 22 |
Correct |
1 ms |
848 KB |
Output is correct |
| 23 |
Correct |
1 ms |
344 KB |
Output is correct |
| 24 |
Correct |
1 ms |
344 KB |
Output is correct |
| 25 |
Correct |
1 ms |
348 KB |
Output is correct |
| 26 |
Correct |
23 ms |
11452 KB |
Output is correct |
| 27 |
Correct |
23 ms |
11604 KB |
Output is correct |
| 28 |
Correct |
23 ms |
11928 KB |
Output is correct |
| 29 |
Correct |
23 ms |
11856 KB |
Output is correct |
| 30 |
Correct |
19 ms |
11088 KB |
Output is correct |
| 31 |
Correct |
22 ms |
8532 KB |
Output is correct |
| 32 |
Correct |
23 ms |
11856 KB |
Output is correct |
| 33 |
Correct |
24 ms |
11864 KB |
Output is correct |
| 34 |
Correct |
21 ms |
8532 KB |
Output is correct |
| 35 |
Correct |
19 ms |
9300 KB |
Output is correct |
| 36 |
Correct |
20 ms |
11088 KB |
Output is correct |
| 37 |
Correct |
19 ms |
11100 KB |
Output is correct |
| 38 |
Correct |
24 ms |
11848 KB |
Output is correct |
| 39 |
Correct |
23 ms |
11860 KB |
Output is correct |
| 40 |
Correct |
23 ms |
11892 KB |
Output is correct |
| 41 |
Correct |
23 ms |
11860 KB |
Output is correct |
| 42 |
Correct |
23 ms |
11608 KB |
Output is correct |
| 43 |
Correct |
23 ms |
11856 KB |
Output is correct |
| 44 |
Correct |
22 ms |
11860 KB |
Output is correct |
| 45 |
Correct |
25 ms |
11868 KB |
Output is correct |
| 46 |
Correct |
23 ms |
11868 KB |
Output is correct |
| 47 |
Correct |
24 ms |
11900 KB |
Output is correct |
| 48 |
Correct |
23 ms |
11868 KB |
Output is correct |
