Submission #1012419

#	Time	Username	Problem	Language	Result	Execution time	Memory
1012419		Luvidi	Discharging (NOI20_discharging)	C++17	47 / 100	1060 ms	17860 KiB

Discharging

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

#define ll long long
#define pll pair<ll, ll>
#define pii pair<int, int>
#define fs first
#define sc second
#define pb push_back

void solve() {
    ll n;
    cin>>n;
    ll a[n+1];
    for(int i=1;i<=n;i++)cin>>a[i];
    bool b=1;
    for(int i=1;i<n;i++)b&=a[i]>=a[i+1];
    if(b){
        cout<<n*a[1];
        return;   
    }
    ll dp[n+1];
    dp[0]=0;
    for(int i=1;i<=n;i++){
        dp[i]=1e18;
        ll m=0;
        for(ll j=i;j;j--){
            m=max(m,a[j]);
            dp[i]=min(dp[i],dp[j-1]+m*(n-j+1));
        }
    }
    cout<<dp[n];
}

int main() {   
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    solve();
}

• Subtask 1: 9 / 9
• Subtask 2: 13 / 13
• Subtask 3: 0 / 25
• Subtask 4: 11 / 11
• Subtask 5: 14 / 14
• Subtask 6: 0 / 28