Submission #527038

#	Time	Username	Problem	Language	Result	Execution time	Memory
527038		niloyroot	Safety (NOI18_safety)	C++14	13 / 100	2081 ms	262148 KiB

safety

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vi = vector<ll>;
using pl = pair<ll,ll>;
#define pb push_back
#define form(m,it) for(auto it=m.begin(); it!=m.end(); it++)
#define forp(i,a,b) for(ll i=a; i<=b; i++)
#define forn(i,a,b) for(ll i=a; i>=b; i--)
#define newl '\n'
#define ff first
#define ss second
const ll mod = 1e9 + 7;
ll dp[5005][10005];

void solve(){
    ll n,h; cin>>n>>h;

    ll a[n+1];
    ll mx=0;
    forp(i,1,n){
        cin>>a[i];
        mx=max(mx,a[i]);
    }

    forp(i,1,n){
        forp(j,0,mx){
            dp[i][j]=INT_MAX;
        }
    }

    forp(i,1,n){
        forp(j,0,mx){
            forp(k,j,min(j+h,mx)){
                dp[i][j] = min(dp[i][j], dp[i-1][k]+abs(a[i]-j));
            }
            forn(k,j,max(0ll,j-h)){
                dp[i][j] = min(dp[i][j], dp[i-1][k]+abs(a[i]-j));
            }
        }
    }

    ll mn=INT_MAX;
    forp(i,0,mx){
        mn=min(mn,dp[n][i]);
    }

    cout<<mn<<newl;
}

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int t=1; //cin>>t;
    while(t--)solve();
}

• Subtask 1: 3 / 3
• Subtask 2: 4 / 4
• Subtask 3: 0 / 9
• Subtask 4: 0 / 5
• Subtask 5: 6 / 6
• Subtask 6: 0 / 11
• Subtask 7: 0 / 11
• Subtask 8: 0 / 22
• Subtask 9: 0 / 29