Submission #756905

#	Time	Username	Problem	Language	Result	Execution time	Memory
756905		Rafi22	Wiring (IOI17_wiring)	C++14	0 / 100	83 ms	15276 KiB

wiring

#include <bits/stdc++.h>


using namespace std;

#define endl '\n'
#define st first
#define nd second
#define pb push_back
#define sz(x) (int)(x).size()
#define all(x) (x).begin(), (x).end()
#define ll long long
ll mod=1000000007;
int inf=1000000007;
ll infl=1000000000000000007;

const int N=200007;

ll DP[N][(1<<7)+7];

ll min_total_length(vector<int>r,vector<int>b)
{
    vector<pair<ll,int>>V,V1;
    int n=sz(r),m=sz(b);
    for(int i=0;i<n;i++) V.pb({r[i],0});
    for(int i=0;i<m;i++) V.pb({b[i],1});
    sort(all(V));
    set<int>S[2];
    S[0].insert(-inf),S[0].insert(inf),S[1].insert(-inf),S[1].insert(inf);
    for(int i=0;i<n+m;i++) S[V[i].nd].insert(i);
    ll sum=0;
    for(int i=0;i<n+m;i++)
    {
        int l=*--S[V[i].nd^1].upper_bound(i);
        int r=*S[V[i].nd^1].upper_bound(i);
        if(i-l<=2||r-i<=2) V1.pb(V[i]);
        else
        {
            ll mn=infl;
            if(l!=-inf) mn=V[i].st-V[l].st;
            if(r!=inf) mn=min(mn,V[r].st-V[i].st);
            sum+=mn;
        }
    }
    for(int i=0;i<sz(V1);i++)
    {
        for(int j=0;j<(1<<7);j++) DP[i+1][j]=infl;
        for(int j=1;j<(1<<7);j+=2) DP[i+1][j/2]=DP[i][j];
        for(int j=0;j<(1<<7);j++)
        {
            for(int l=0;l<6;l++)
            {
                if(i-6+l>=0&&V1[i].nd!=V1[i-6+l].nd)
                {
                    DP[i+1][j|(1<<l)|(1<<6)]=min(DP[i+1][j|(1<<l)|(1<<6)],DP[i+1][j]+V[i].st-V[i-6+l].st);
                }
            }
        }
    }
    return sum+DP[sz(V1)][(1<<7)-1];
}
/*
int main()
{
    cout<<min_total_length({1, 2, 3, 7},{0, 4, 5, 9, 10})<<endl;
    return 0;
}
*/

• Subtask 1: 0 / 7
• Subtask 2: 0 / 13
• Subtask 3: 0 / 10
• Subtask 4: 0 / 25
• Subtask 5: 0 / 45