Submission #620809

#	Time	Username	Problem	Language	Result	Execution time	Memory
620809		amin	Horses (IOI15_horses)	C++14	34 / 100	1573 ms	38960 KiB

horses

#include "horses.h"
#include<bits/stdc++.h>
using namespace std;

long long x[500001];
long long seg[1000002],segg[1000002],mu[1000002];
long long y[500001];
long long h=(1e9+1);
long long mod=1e9+7;
void build(long v,long tl,long tr)
{
    if(tl==tr)
    {
        seg[v]=x[tl];
        mu[v]=seg[v];
        return ;
    }
    long tm=(tl+tr)/2;
    build(v*2,tl,tm);
    build(v*2+1,tm+1,tr);
    seg[v]=seg[v*2]*seg[v*2+1];
    mu[v]=(mu[v*2]*mu[v*2+1])%mod;

    if(seg[v]>h)
    {
        seg[v]=h;
    }
}
void update(long v,long tl,long tr,long in)
{
    if(tl==tr&&tl==in)
    {
        seg[v]=x[in];
        mu[v]=seg[v];
        return ;
    }
    long tm=(tl+tr)/2;
    if(tm>=in)
    {
        update(v*2,tl,tm,in);
    }else
    {
        update(v*2+1,tm+1,tr,in);
    }
    seg[v]=seg[v*2]*seg[v*2+1];
    mu[v]=(mu[v*2]*mu[v*2+1])%mod;
    if(seg[v]>h)
    {
        seg[v]=h;
    }
}
long long get(long v,long tl,long tr,long l,long r)
{
    if(l==tl&&r==tr)
    {
        return seg[v];
    }
    long tm=(tl+tr)/2;
    if(r<=tm)
    {
        return get(v*2,tl,tm,l,r);
    }
    if(l>tm)
    {
        return get(v*2+1,tm+1,tr,l,r);
    }
    long long j=get(v*2,tl,tm,l,tm)*get(v*2+1,tm+1,tr,tm+1,r);
    if(j>h)
    {
        j=h;
    }
    return j;
}
long n;

void build2(long v,long tl,long tr)
{
    if(tl==tr)
    {
        segg[v]=tl;
        return ;
    }
    long tm=(tl+tr)/2;
    build2(v*2,tl,tm);
    build2(v*2+1,tm+1,tr);
    long long a=segg[v*2];
    long long b=segg[v*2+1];
   // cout<<a<<' '<<b<<' ';
   // cout<<y[a]<<' '<<y[b]*get(1,0,n-1,a+1,b)<<endl;
    if(y[a]>(y[b]*get(1,0,n-1,a+1,b)))
    {
      segg[v]=a;

    }else
    {
        segg[v]=b;
    }
}
void update2(long v,long tl,long tr,long in)
{
    if(tl==tr)
    {
        segg[v]=tl;
        return ;
    }
    long tm=(tl+tr)/2;
    if(tm>=in)
    {
        update2(v*2,tl,tm,in);
    }else
    {
        update2(v*2+1,tm+1,tr,in);
    }
      long long a=segg[v*2];
    long long b=segg[v*2+1];
   // cout<<a<<' '<<b<<' ';
   // cout<<y[a]<<' '<<y[b]*get(1,0,n-1,a+1,b)<<endl;
    if(y[a]>(y[b]*get(1,0,n-1,a+1,b)))
    {
      segg[v]=a;

    }else
    {
        segg[v]=b;
    }

}
long long get2(long v,long tl,long tr,long l,long r)
{

    if(l==tl&&r==tr)
    {
        return mu[v];
    }
    long tm=(tl+tr)/2;
    if(r<=tm)
    {
        return get2(v*2,tl,tm,l,r);
    }
    if(l>tm)
    {
        return get2(v*2+1,tm+1,tr,l,r);
    }
    long long j=(get2(v*2,tl,tm,l,tm)*get2(v*2+1,tm+1,tr,tm+1,r))%mod;

    return j;
}
int init(int N, int X[], int Y[]) {
  //  cout<<mod<<endl;
    n=N;
    for(long i=0;i<n;i++)
    {
        x[i]=X[i];
        y[i]=Y[i];
    }
    build(1,0,n-1);
build2(1,0,n-1);

	long long ans=((get2(1,0,n-1,0,segg[1])*y[segg[1]])%mod);
	return ans;
}

int updateX(int pos, int val) {
   // pos--;
    x[pos]=val;
    update(1,0,n-1,pos);
	update2(1,0,n-1,pos);
	 // build(1,0,n-1);
//build2(1,0,n-1);
	long long ans=((get2(1,0,n-1,0,segg[1])*y[segg[1]])%mod);
	return ans;
}

int updateY(int pos, int val) {
   //  pos--;
    y[pos]=val;
    update(1,0,n-1,pos);
	update2(1,0,n-1,pos);
	 // build(1,0,n-1);
//build2(1,0,n-1);
long long ans=((get2(1,0,n-1,0,segg[1])*y[segg[1]])%mod);
	return ans;
}

Compilation message (stderr)

horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:160:9: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  160 |  return ans;
      |         ^~~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:171:9: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  171 |  return ans;
      |         ^~~
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:182:9: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  182 |  return ans;
      |         ^~~

• Subtask 1: 17 / 17
• Subtask 2: 17 / 17
• Subtask 3: 0 / 20
• Subtask 4: 0 / 23
• Subtask 5: 0 / 23