Submission #1010482

#	Time	Username	Problem	Language	Result	Execution time	Memory
1010482		Almonther	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++98	0 / 100	1 ms	348 KiB

Main

#include <bits/stdc++.h>

#define suiii ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define ll long long
#define co cout<<
//#pragma GCC optimize("O3,Ofast,unroll-loops")
//#pragma GCC target("avx2,sse3,sse4,avx")
using namespace std;
//stuff
ll n;
ll arr[1000001];
ll pref[100001];
ll suff[1000001];
ll val[1000001];
ll val1[1000001];
ll mn=1e18;
ll cnt=0;
void solve(){
    cin>>n;
    for(int i=1;i<=n;i++) cin>>arr[i];
    for(int i=2;i<=n;i++){
        pref[i]=pref[i-1];
        val[i]=0;
        ll last=arr[i-1]+val[i-1];
        if(arr[i]<last+1){
            ll diff=(last+1)-arr[i];
            val[i]=diff;
        }
    }
    for(int i=1;i<=n;i++){
        pref[i]=pref[i-1];
        if(val[i]>val[i-1]) pref[i]+=val[i]-val[i-1];
    }
    for(int i=n-1;i>=1;i--){
        suff[i]=suff[i+1];
        val1[i]=0;
        ll last=arr[i+1]+val1[i+1];
        if(arr[i]<last+1){
            ll diff=(last+1)-arr[i];
            val1[i]=diff;
        }
    }
    for(int i=n;i>=1;i--){
        suff[i]=suff[i+1];
        if(val1[i]>val1[i+1]) suff[i]+=val1[i]-val1[i-1];
    }
    for(int i=1;i<=n;i++){
        if(pref[i-1]>suff[i+1]){
            ll mynum=arr[i]+suff[i];
            ll num1=arr[i-1]+pref[i-1]+1;
            mn=min(mn,pref[i-1]+max(0ll,num1-mynum));
        }
        else if(pref[i-1]==suff[i+1]){
            ll mynum=arr[i]+suff[i];
            ll num1=arr[i-1]+pref[i-1]+1;
            mn=min(mn,pref[i-1]+max(0ll,num1-mynum));
            mynum=arr[i]+pref[i];
            num1=arr[i+1]+suff[i+1]+1;
            mn=min(mn,suff[i+1]+max(0ll,num1-mynum));
        }
        else{
            ll mynum=arr[i]+pref[i];
            ll num1=arr[i+1]+suff[i+1]+1;
            mn=min(mn,suff[i+1]+max(0ll,num1-mynum));
        }
    }
    co mn;
}

int main()
{
    suiii
    int tt=1;
    // cin>>tt;
    while(tt--){
        solve();
    }
    return 0;
}

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