Submission #889314

#	Time	Username	Problem	Language	Result	Execution time	Memory
889314		JakobZorz	Rail (IOI14_rail)	C++17	8 / 100	58 ms	708 KiB

rail

#include"rail.h"
#include<iostream>
#include<vector>
#include<algorithm>
typedef long long ll;
using namespace std;

void findLocation(int n,int first,int location[],int stype[]){
    location[0]=0;
    vector<pair<int,int>>dist0(n-1);
    for(int i=0;i<n-1;i++)
        dist0[i]={getDistance(0,i+1),i+1};
    sort(dist0.begin(),dist0.end());
    
    vector<int>left,right;
    stype[0]=1;
    
    for(auto[dist,i]:dist0){
        if(right.empty()){
            right.push_back(i);
            location[i]=dist;
            stype[i]=2;
            continue;
        }
        
        int dist1=getDistance(right[0],i);
        //cout<<dist1<<" + "<<dist0[right[0]].first<<" == "<<dist<<"\n";
        if(dist1+dist0[right[0]].first==dist+1){ // i is on the left side
            dist-=2*dist0[right[0]].first-2;
            bool done=false;
            for(int j=0;j<(int)left.size()-1;j++){
                int a=location[left[j]];
                int b=location[left[j+1]];
                int nloc=2*a+dist;
                if(a<nloc&&nloc<b){
                    int dist2=getDistance(left[j],i);
                    if(dist2-a==dist){
                        done=true;
                        location[i]=nloc;
                        stype[i]=2;
                    }
                }
            }
            
            if(!done){
                left.push_back(i);
                location[i]=-dist;
                stype[i]=1;
            }
        }else{ // i is on the right side
            bool done=false;
            for(int j=1;j<(int)right.size()-1;j++){
                int a=location[right[j]];
                int b=location[right[j+1]];
                int nloc=2*b-dist;
                if(a<nloc&&nloc<b){
                    int dist2=getDistance(right[j+1],i);
                    if(dist2+b==dist){
                        done=true;
                        location[i]=nloc;
                        stype[i]=1;
                    }
                }
            }
            
            if(!done){
                right.push_back(i);
                location[i]=dist;
                stype[i]=2;
            }
        }
    }
    
    for(int i=0;i<n;i++){
        location[i]+=first;
        //cout<<stype[i]<<" "<<location[i]<<"\n";
    }
    
}

• Subtask 1: 8 / 8
• Subtask 2: 0 / 22
• Subtask 3: 0 / 26
• Subtask 4: 0 / 44