Submission #551455

#	Time	Username	Problem	Language	Result	Execution time	Memory
551455		krit3379	Rail (IOI14_rail)	C++17	30 / 100	73 ms	716 KiB

rail

#include<bits/stdc++.h>
using namespace std;
#include"rail.h"
#define N 5005

struct A{
    int x,id;
    bool operator<(const A& o)const{
        return x<o.x;
    }
};

int dis[N][N];
A l,r;
vector<A> v;
set<int> L,R;

void findLocation(int n, int first, int location[], int stype[]){
    int i,pos;
    location[0]=first;
    stype[0]=1;
    if(n==1)return ;
    l={first,0};
    L.insert(l.x);
    for(i=1;i<n;i++){
        dis[0][i]=getDistance(0,i);
        v.push_back({dis[0][i],i});
    }
    sort(v.begin(),v.end());
    r={l.x+v[0].x,v[0].id};
    location[v[0].id]=r.x;
    stype[v[0].id]=2;
    R.insert(r.x);
    for(i=1;i<v.size();i++){
        int xl,xr;
        xl=getDistance(v[i].id,l.id);
        xr=getDistance(v[i].id,r.id);
        pos=l.x+xl;
        auto it1=L.lower_bound(pos);
        it1--;
        if(xr==r.x+pos-*it1*2){
            A temp={pos,v[i].id};
            location[v[i].id]=pos;
            stype[v[i].id]=2;
            r=max(r,temp);
            R.insert(pos);
            continue;
        }
        pos=r.x-xr;
        A temp={pos,v[i].id};
        location[v[i].id]=pos;
        stype[v[i].id]=1;
        l=min(l,temp);
        L.insert(pos);
    }
    return ;
}

Compilation message (stderr)

rail.cpp: In function 'void findLocation(int, int, int*, int*)':
rail.cpp:34:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<A>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |     for(i=1;i<v.size();i++){
      |             ~^~~~~~~~~

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