Submission #245877

#	Time	Username	Problem	Language	Result	Execution time	Memory
245877		Fasho	Rail (IOI14_rail)	C++14	30 / 100	79 ms	1148 KiB

rail

#include <bits/stdc++.h>
#define N 1000005
#define ll long long int    
#define MP make_pair
#define pb push_back
#define ppb pop_back
#define sp " "
#define endl "\n"
#define fi first
#define se second
#define ii pair<int,int>
#define lli pair<ll,ll>
#define fast cin.tie(0);cout.tie(0);ios_base::sync_with_stdio(false)
#define fast2 freopen ("badhair.gir","r",stdin);freopen ("badhair.cik","w",stdout);
#define mod 1000000007
#define fs(x,y) for(ll i=1;i<=y;i++) cin>>x[i]
#define fo(i,x,y) for(ll i=x;i<=y;i++)
#define INF 1000000000005
#define ull unsigned long long int
#include "rail.h"
using namespace std;

ll n,m,ar[N],sum,t,tut[N],a,b,l,r,tutt[N],xx[N];
lli p[N];
ll calc(int ind)
{
    ll tutmac=ind;
    ind=p[ind].se;
    ll x=getDistance(ind,tutt[l]);
    ll y=getDistance(ind,tutt[r]);
    // cout<<r<<endl;
    // cout<<x<<sp<<y<<sp;
    // if(tutmac==2)
    // cout<<"[d] "<<tutt[r]<<sp<<p[1].se<<endl;
    a=l+x;
    b=r-y;
    ll tut=fabs(r-a);
    tut=y-tut;
    tut/=2;
    tut=min(a,r)-tut;
    // if(tutmac==2)
    //  cout<<r<<sp<<a<<sp<<tut<<sp;
    // if(tutmac==2)
    //  cout<<x<<sp<<y<<endl;
    // cout<<l<<sp<<r<<sp<<x<<sp<<y<<sp<<tut<<endl<<endl;
    return tut;

}
ll calc2(int ind)
{
    ll tutmac=ind;
    ind=p[ind].se;
    ll x=getDistance(ind,tutt[l]);
    ll y=getDistance(ind,tutt[r]);

    // cout<<r<<endl;
    // cout<<x<<sp<<y<<sp;
    a=l-x;
    b=r-y;
    ll tut=fabs(r-a);
    tut=y-tut;
    tut/=2;
    tut=min(a,r)-tut;
    // if(tutmac==2)
    //  cout<<r<<sp<<a<<sp<<tut<<sp;
    // if(tutmac==2)
    //  cout<<x<<sp<<y<<endl;
    // cout<<l<<sp<<r<<sp<<x<<sp<<y<<sp<<tut<<endl<<endl;
    return tut;

}

void findLocation(int nn, int frst, int location[], int stype[])
{
    // cout<<endl;
    n=nn;
    l=frst;
    stype[0]=1;
    location[0]=frst;
    tut[frst]=1;
    tutt[frst]=0;
    fo(i,1,n-1)
    {
        p[i].fi=getDistance(0, i);
        p[i].se=i;
    }
    sort(p+1,p+n);
    r=p[1].fi+frst;
    tut[r]=2;
    tutt[r]=p[1].se;
    stype[p[1].se]=2;
    location[p[1].se]=r;
    // fo(i,0,n-1)
    // cout<<p[i].fi<<sp<<p[i].se<<sp<<endl;
    // cout<<endl;
    fo(i,2,n-1)
    {
        // cout<<i<<sp;
        ll x=calc(i);
        xx[i]=x;
        // if(i==2)
        //     cout<<x<<endl;
        // cout<<x<<endl;;
        // cout<<l<<sp<<r<<sp<<x<<endl;
        if(tut[x]==2)
        {
            tut[b]=1;
            tutt[b]=p[i].se;
            l=min(l,b);
            stype[p[i].se]=1;
            location[p[i].se]=b;
            // cout<<"HELLO"<<sp<<b<<endl;
            continue;
        }
        if(tut[x]==1)
        {
            tut[a]=2;
            tutt[a]=p[i].se;
            r=max(r,a);
            stype[p[i].se]=2;
            location[p[i].se]=a;
            continue;
        }
    }
    // cout<<endl;
    // fo(i,0,n)
    // {
    //  ll ind=p[i].se;
    //  // cout<<xx[i]<<endl;
    //  if(stations[ind].location!=location[ind] || stations[ind].type!=stype[ind])
    //  {
    //      cout<<"HELLO"<<sp;
    //      cout<<i<<sp<<p[i].se<<endl;
    //      cout<<stations[ind].location<<sp<<stations[ind].type<<sp<<sp<<location[ind]<<sp<<stype[ind]<<endl;
    //      break;
    //  }

    // }
    // fo(i,0,n-1)
    // cout<<stype[i]<<sp<<location[i]<<endl;
}

Compilation message (stderr)

rail.cpp: In function 'long long int calc(int)':
rail.cpp:27:8: warning: unused variable 'tutmac' [-Wunused-variable]
     ll tutmac=ind;
        ^~~~~~
rail.cpp: In function 'long long int calc2(int)':
rail.cpp:51:8: warning: unused variable 'tutmac' [-Wunused-variable]
     ll tutmac=ind;
        ^~~~~~

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