Submission #757111

#	Time	Username	Problem	Language	Result	Execution time	Memory
757111		alexander707070	Wiring (IOI17_wiring)	C++14	7 / 100	1068 ms	262144 KiB

wiring

#include<bits/stdc++.h>
#define MAXN 100007
using namespace std;

const long long inf=1e15;

int n,m;
int red[MAXN],blue[MAXN];

unordered_map<long long,bool> li;
unordered_map<long long,long long> dp;

long long st(long long x,long long y){
    return x*1000000+y;
}

long long ff(int l,int r){
    if(abs(l-r)>50 and n+m>500)return inf;
    if(l==n and r==m)return abs(red[l]-blue[r]);

    if(li[st(l,r)])return dp[st(l,r)];
    li[st(l,r)]=true;
    dp[st(l,r)]=inf;

    if(l<n)dp[st(l,r)]=min(dp[st(l,r)],ff(l+1,r));
    if(r<m)dp[st(l,r)]=min(dp[st(l,r)],ff(l,r+1));
    if(l<n and r<m)dp[st(l,r)]=min(dp[st(l,r)],ff(l+1,r+1));

    dp[st(l,r)]+=abs(red[l]-blue[r]);

    return dp[st(l,r)];
}

long long min_total_length(vector<int> R,vector<int> B){

    n=int(R.size()); m=int(B.size());

    for(int i=1;i<=n;i++)red[i]=R[i-1];
    for(int i=1;i<=m;i++)blue[i]=B[i-1];

    return ff(1,1);
}

/*
int main(){
    cout<<min_total_length({1, 2, 3, 7}, {0, 4, 5, 9, 10})<<"\n";
}
*/

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