Submission #1131282

#	Time	Username	Problem	Language	Result	Execution time	Memory
1131282		12345678	Ski 2 (JOI24_ski2)	C++20	42 / 100	156 ms	1576 KiB

Main

#include <bits/stdc++.h>

using namespace std;

#define ll long long

const int nx=41, mx=81;

ll n, mv, h[nx], ch[nx], c[nx], dp[mx][nx][nx], cnt[mx], mn[mx], res, ans=1e18;

ll solve(int i, int j, int k)
{
    if (dp[i][j][k]!=-1) return dp[i][j][k];
    if (i==mx-1) return max(j-k, 0)*mn[i-1];
    dp[i][j][k]=1e18;
    for (int l=0; l<=j; l++)
    {
        if (j-l<=k) dp[i][j][k]=min(dp[i][j][k], solve(i+1, cnt[i+1]+l, k)+l*mv);
        else dp[i][j][k]=min(dp[i][j][k], solve(i+1, cnt[i+1]+l, j-l)+mn[i-1]*((j-l)-k)+l*mv);
    }
    return dp[i][j][k];
}

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>n>>mv;
    for (int i=1; i<=n; i++) cin>>h[i]>>c[i];
    for (int st=1; st<=n; st++)
    {
        res=0;
        for (int i=1; i<=n; i++)
        {
            if (i==st||h[i]>h[st]) ch[i]=h[i];
            else ch[i]=h[st]+1, res+=(ch[i]-h[i])*mv;
        }
        for (int i=0; i<mx; i++) cnt[i]=0, mn[i]=1e18;
        for (int i=1; i<=n; i++) mn[ch[i]]=min(mn[ch[i]], c[i]), cnt[ch[i]]++;
        for (int i=1; i<mx; i++) mn[i]=min(mn[i], mn[i-1]);
        for (int i=0; i<mx; i++) for (int j=0; j<nx; j++) for (int k=0; k<nx; k++) dp[i][j][k]=-1;
        ans=min(ans, res+solve(ch[st]+1, cnt[ch[st]+1], 1));
        //cout<<"debug "<<st<<' '<<res<<' '<<solve(ch[st]+1, cnt[ch[st]+1], 1)<<'\n';
        if (st==3&&0)
        {
            for (int i=1; i<=4; i++) for (int j=0; j<=5; j++) for (int k=0; k<=3; k++) cout<<i<<' '<<j<<' '<<k<<' '<<dp[i][j][k]<<'\n';
        }
    }
    cout<<ans;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 12
• Subtask 3: 9 / 9
• Subtask 4: 33 / 33
• Subtask 5: 0 / 27
• Subtask 6: 0 / 14