Submission #1125734

#	Time	Username	Problem	Language	Result	Execution time	Memory
1125734		12345678	Treatment Project (JOI20_treatment)	C++20	0 / 100	2 ms	576 KiB

treatment

#include <bits/stdc++.h>

using namespace std;

const int nx=5e3+5;

#define ll long long

struct plan
{
    ll l, r, t, c, s;
    bool operator<(const plan &o) const {return s<o.s;}
} p[nx];

ll n, m, dp[nx], res=1e18;

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>n>>m;
    for (int i=1; i<=m; i++) 
    {
        cin>>p[i].t>>p[i].l>>p[i].r>>p[i].c;
        p[i].s=(p[i].r==n)?1e18:p[i].r+p[i].t;
    }
    sort(p+1, p+m+1);
    for (int i=1; i<=m; i++)
    {
        dp[i]=1e18;
        if (p[i].l==1) dp[i]=p[i].c;
        else
        {
            for (int j=1; j<i; j++)
            {
                if (p[j].s<p[i].s)
                {
                    if ((((p[j].r+p[j].t)-(p[i].l-p[i].t)+1)/2)>=max(p[j].t, p[i].t))
                    {
                        dp[i]=min(dp[i], dp[j]+p[i].c);
                    }
                }
            }
        }
    }
    /*
    for (int i=1; i<=m; i++)
    {
        cout<<"debug "<<p[i].l<<' '<<p[i].r<<' '<<p[i].t<<' '<<p[i].c<<'\n';
        cout<<"cost "<<dp[i]<<'\n';
    }
    */
    for (int i=1; i<=m; i++) 
    {
        if (p[i].r==n) 
        {
            res=min(res, dp[i]);
        }
        
    }
    if (res==1e18) cout<<-1;
    else cout<<res;
}

• Subtask 1: 0 / 4
• Subtask 2: 0 / 5
• Subtask 3: 0 / 30
• Subtask 4: 0 / 61