Submission #135450

#	Time	Username	Problem	Language	Result	Execution time	Memory
135450		tinjyu	말 (IOI15_horses)	C++14	17 / 100	170 ms	21468 KiB

horses

#include "horses.h"
#include <iostream>
using namespace std;
long long int x[1000005],y[1000005],tree[2000005],st,en;
int n;
long long int build(int s,int e,int t)
{
    if(s==e)return tree[t]=x[s];
    else 
	{	tree[t]=(build(s,(s+e)/2,t*2)*build((s+e)/2+1,e,t*2+1))%1000000007;
		//cout<<s<<" "<<e<<" "<<tree[t]<<endl;
		return tree[t]; 

	}
}
long long int findtree(int s,int e,int t)
{
	//cout<<s<<" "<<e<<" "<<st<<" "<<en<<" "<<tree[t]<<endl;
    if(e<st || en<s)return 1;
    else if(st<=s && e<=en)return tree[t];
    else return (findtree(s,(s+e)/2,t*2)*findtree((s+e)/2+1,e,t*2+1))%1000000007;
}
long long int changetree(int s,int e,int t)
{
    if(s==e)return en;
    if(st<s || e<st)return 1;
    else return tree[t]=(changetree(s,(s+e)/2,t*2)*changetree((s+e)/2+1,e,t*2+1))%1000000007;
}
int init(int N, int X[], int Y[]) {
    n=N;
    for(int i=0;i<n;i++)x[i]=X[i];
    for(int i=0;i<n;i++)y[i]=Y[i];
    build(0,n-1,1);
    long long int ans=max(n-32,0),tmp=1;
    for(int i=max(n-32,0);i<n;i++)
    {
        double t=(double)y[ans]/double(y[i]);
        if(tmp<1000000000)tmp*=x[i];
        if(tmp>=t)
        {
            ans=i;
            tmp=1;
        }
    }
    long long int a=y[ans];
    en=ans;
    //cout<<ans<<endl;
    a=(a*findtree(0,n-1,1))%1000000007;
	return a;
}
 
int updateX(int pos, int val) {
    x[pos]=val;
    st=pos,en=val;
    changetree(0,n-1,1);
    long long int ans=max(n-32,0),tmp=1;
    for(int i=max(n-32,0);i<n;i++)
    {
        double t=(double)y[ans]/double(y[i]);
        if(tmp<1000000000)tmp*=x[i];
        if(tmp>=t)
        {
            ans=i;
            tmp=1;
        }
    }
	int a=y[ans];
    en=ans;
    a=(a*findtree(0,n-1,1))%1000000007;
	return a;
}
 
int updateY(int pos, int val) {
    y[pos]=val;
    long long int ans=max(n-32,0),tmp=1;
    for(int i=max(n-32,0);i<n;i++)
    {
        double t=(double)y[ans]/double(y[i]);
        if(tmp<1000000000)tmp*=x[i];
        if(tmp>=t)
        {
            ans=i;
            tmp=1;
        }
    }
    long long int a=y[ans];
    en=ans;
    a=(a*findtree(0,n-1,1))%1000000007;
	return a;
}

Compilation message (stderr)

horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:39:17: warning: conversion to 'double' from 'long long int' may alter its value [-Wconversion]
         if(tmp>=t)
                 ^
horses.cpp:49:9: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
  return a;
         ^
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:61:17: warning: conversion to 'double' from 'long long int' may alter its value [-Wconversion]
         if(tmp>=t)
                 ^
horses.cpp:67:13: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
  int a=y[ans];
        ~~~~~^
horses.cpp:69:28: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
     a=(a*findtree(0,n-1,1))%1000000007;
       ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:80:17: warning: conversion to 'double' from 'long long int' may alter its value [-Wconversion]
         if(tmp>=t)
                 ^
horses.cpp:89:9: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
  return a;
         ^

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