Submission #434255

#	Time	Username	Problem	Language	Result	Execution time	Memory
434255		healme	Wiring (IOI17_wiring)	C++14	100 / 100	37 ms	9252 KiB

wiring

#include "wiring.h"
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define X first
#define Y second
#define pb push_back
void minn(int &a,int b){
    if(b<a) a=b;
}
void maxx(int &a,int b){
    if(b<a) a=b;
}
using ll =long long;
const int MAX=2e5+2,inf=2e9+4;
const ll oo=1e16;
using ll =long long;
int dp[2][MAX];
int F[MAX],D[MAX];
#undef int
long long min_total_length(std::vector<int> r, std::vector<int> b)
#define int long long
{
    int n=r.size(),m=b.size();
    r.pb(inf);b.pb(inf);
    bool tt=(r[0]>b[0]);
    int ans=0;
    int u=0,v=0;
    int cn=0;
    memset(F,0x3f,sizeof F);
    memset(dp,0x3f,sizeof dp);
    dp[!tt][0]=0;
    while(u!=n || v!=m){
        if(tt){
            int st=v;
            while(b[v]<r[u]) v++;
            int pre;
            if(u==0) pre=-inf;
            else pre=r[u-1];
            int res=0,pl=b[st]-pre;
            F[cn+1]=oo;
            for(int i=cn;i>=0;i--)
                F[i]=min(F[i+1]+pl,dp[!tt][i]);
            D[0]=dp[!tt][0];
            for(int i=1;i<=cn;i++)
                D[i]=min(D[i-1],dp[!tt][i]);
            for(int i=st;i<=v;i++){
                dp[tt][v-i]=res+min(F[i-st],D[min(i-st,cn)]);
                res+=b[i]-pre;
            }
            res=0;
            for(int i=v-1;i>=st;i--){
                res+=b[v-1]-b[i];
                dp[tt][v-i]+=res;

            }
            for(int i=v-st;i<=cn;i++) F[i]=D[i]=oo;
            cn=v-st;

        }
        else{
            int st=u;
            while(r[u]<b[v]) u++;
            int pre;
            if(v==0) pre=-inf;
            else pre=b[v-1];
            int res=0,pl=r[st]-pre;
            F[cn+1]=oo;
            for(int i=cn;i>=0;i--)
                F[i]=min(F[i+1]+pl,dp[!tt][i]);
            D[0]=dp[!tt][0];
            for(int i=1;i<=cn;i++)
                D[i]=min(D[i-1],dp[!tt][i]);
            for(int i=st;i<=u;i++){
                dp[tt][u-i]=res+min(F[i-st],D[min(i-st,cn)]);
                res+=r[i]-pre;
            }
            res=0;
            for(int i=u-1;i>=st;i--){
                res+=r[u-1]-r[i];
                dp[tt][u-i]+=res;
            }
            for(int i=u-st;i<=cn;i++) F[i]=D[i]=oo;
            cn=u-st;
        }
        //cout<<"ST "<<tt<<' '<<cn<<' '<<dp[tt][cn]<<'\n';
        //for(int i=0;i<=cn;i++) cout<<dp[tt][i]<<' ';cout<<'\n';

        tt^=1;
    }
    ans=dp[!tt][0];
	return ans;
}

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