Submission #623744

#	Time	Username	Problem	Language	Result	Execution time	Memory
623744		Abrar_Al_Samit	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	0 / 100	1 ms	212 KiB

Main

#include<bits/stdc++.h>
using namespace std;

void PlayGround() {
  int n;
  cin>>n;
  int a[n];
  for(int i=0; i<n; ++i) {
    cin>>a[i];
  }
  if(n==2) {
    cout<<"0\n";
    return;
  }
  long long b[n-1];
  for(int i=1; i<n; ++i) {
    b[i-1] = a[i]-a[i-1];
  }


  int l = 0, r = n-2;
  long long ans = 0;
  while(l<r) {
    while(l<r && b[l]>0) ++l;
    while(l<r && b[r]<0) --r;
    if(l==r) {
      ans += b[l]==0;
      break;
    }
    long long cur = min(-b[l], b[r])+1;
    b[l] += cur;
    b[r] -= cur;
    ans += cur;
  }
  cout<<ans<<'\n';
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  PlayGround();
  return 0;
}

• Subtask 1: 0 / 40
• Subtask 2: 0 / 60