Submission #869866

#	Time	Username	Problem	Language	Result	Execution time	Memory
869866		12345678	Pinball (JOI14_pinball)	C++17	51 / 100	3 ms	860 KiB

pinball

#include <bits/stdc++.h>

using namespace std;

#define ll long long

const int nx=1e3+5;
ll dpl[nx], dpr[nx], n, m, a[nx], b[nx], c[nx], d[nx], ml, mr, res=1e17;

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>m>>n;
    for (int i=1; i<=m; i++) cin>>a[i]>>b[i]>>c[i]>>d[i];
    for (int i=1; i<=m; i++)
    {
        dpl[i]=dpr[i]=ml=mr=1e17;
        if (a[i]==1) dpl[i]=d[i], ml=0;
        if (b[i]==n) dpr[i]=d[i], mr=0;
        for (int j=1; j<i; j++) 
        {
            if (a[i]<=c[j]&&c[j]<=b[i]) 
            {
                dpl[i]=min(dpl[i], dpl[j]+d[i]);
                dpr[i]=min(dpr[i], dpr[j]+d[i]);
                ml=min(ml, dpl[j]);
                mr=min(mr, dpr[j]);
            }
        }
        res=min(res, ml+mr+d[i]);
        //cout<<i<<' '<<dpl[i]<<' '<<dpr[i]<<' '<<ml<<' '<<mr<<' '<<res<<'\n';
    }
    cout<<((res==1e17)?-1:res);
}

• Subtask 1: 11 / 11
• Subtask 2: 18 / 18
• Subtask 3: 22 / 22
• Subtask 4: 0 / 49