Submission #731337

#	Time	Username	Problem	Language	Result	Execution time	Memory
731337		lucri	Horses (IOI15_horses)	C++17	17 / 100	1210 ms	38072 KiB

horses

#include "horses.h"
#include <bits/stdc++.h>
#define MOD 1000000007
long long aintx[2000010],x[500010];
long long ainty[2000010],y[500010];
long long aintprod[2000010],n;

void initializeaintx(int poz,int b,int e)
{
    if(b==e)
    {
        aintx[poz]=(x[b]!=1);
        return;
    }
    initializeaintx(poz*2,b,(b+e)/2);
    initializeaintx(poz*2+1,(b+e)/2+1,e);
    aintx[poz]=(aintx[poz*2]|aintx[poz*2+1]);
}
void updateaintx(int poz,int b,int e,int pozm,int val)
{
    if(e<pozm||b>pozm)
        return;
    if(b==e)
    {
        aintx[poz]=(x[b]!=1);
        return;
    }
    updateaintx(poz*2,b,(b+e)/2,pozm,val);
    updateaintx(poz*2+1,(b+e)/2+1,e,pozm,val);
    aintx[poz]=(aintx[poz*2]|aintx[poz*2+1]);
}

void initializeainty(int poz,int b,int e)
{
    if(b==e)
    {
        ainty[poz]=y[b];
        return;
    }
    initializeainty(poz*2,b,(b+e)/2);
    initializeainty(poz*2+1,(b+e)/2+1,e);
    ainty[poz]=std::max(ainty[poz*2],ainty[poz*2+1]);
}
void updateainty(int poz,int b,int e,int pozm,int val)
{
    if(e<pozm||b>pozm)
        return;
    if(b==e)
    {
        ainty[poz]=y[b];
        return;
    }
    updateainty(poz*2,b,(b+e)/2,pozm,val);
    updateainty(poz*2+1,(b+e)/2+1,e,pozm,val);
    ainty[poz]=std::max(ainty[poz*2],ainty[poz*2+1]);
}

void initializeaintprod(int poz,int b,int e)
{
    if(b==e)
    {
        aintprod[poz]=x[b];
        return;
    }
    initializeaintprod(poz*2,b,(b+e)/2);
    initializeaintprod(poz*2+1,(b+e)/2+1,e);
    aintprod[poz]=aintprod[poz*2]*aintprod[poz*2+1]%MOD;
}
void updateaintprod(int poz,int b,int e,int pozm,int val)
{
    if(e<pozm||b>pozm)
        return;
    if(b==e)
    {
        aintprod[poz]=x[b];
        return;
    }
    updateaintprod(poz*2,b,(b+e)/2,pozm,val);
    updateaintprod(poz*2+1,(b+e)/2+1,e,pozm,val);
    aintprod[poz]=aintprod[poz*2]*aintprod[poz*2+1]%MOD;
}

long long difde0(int poz,int b,int e,int ei)
{
    if(b>=ei)
        return 0;
    if(aintx[poz]==0)
        return 0;
    if(b==e)
        return b;
    int poza=difde0(poz*2+1,(b+e)/2+1,e,ei);
    if(poza)
        return poza;
    return difde0(poz*2,b,(b+e)/2,ei);
}
long long maxim(int poz,int b,int e,int bi,int ei)
{
    if(b>ei||e<bi)
        return 0;
    if(bi<=b&&e<=ei)
        return ainty[poz];
    return std::max(maxim(poz*2,b,(b+e)/2,bi,ei),maxim(poz*2+1,(b+e)/2+1,e,bi,ei));
}
long long produs(int poz,int b,int e,int bi,int ei)
{
    if(b>ei||e<bi)
        return 1;
    if(bi<=b&&e<=ei)
        return aintprod[poz];
    return produs(poz*2,b,(b+e)/2,bi,ei)*produs(poz*2+1,(b+e)/2+1,e,bi,ei)%MOD;
}


long long calculeaza()
{
    long long prod=x[n]*y[n],pozant=n;
    while(prod<1000000000&&pozant)
    {
        int pozac=pozant;
        pozant=difde0(1,1,n,pozant);
        long long vmax=maxim(1,1,n,pozant,pozac-1);
        if(vmax>prod)
            prod=vmax;
        if(pozant!=0)
            prod*=x[pozant];
    }
    prod%=MOD;
    return prod*produs(1,1,n,1,pozant-1);
}

int init(int N, int X[], int Y[])
{
    n=N;
    for(int i=1;i<=N;++i)
    {
        x[i]=X[i-1];
        y[i]=Y[i-1];
    }
    initializeaintx(1,1,N);
    initializeainty(1,1,N);
    initializeaintprod(1,1,N);
    return calculeaza();
}

int updateX(int pos, int val)
{
    ++pos;
    x[pos]=val;
    updateaintx(1,1,n,pos,val);
    updateaintprod(1,1,n,pos,val);
    calculeaza();
	return calculeaza();
}

int updateY(int pos, int val)
{
    ++pos;
    y[pos]=val;
    updateainty(1,1,n,pos,val);
    calculeaza();
	return calculeaza();
}

Compilation message (stderr)

horses.cpp: In function 'long long int difde0(int, int, int, int)':
horses.cpp:91:20: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   91 |     int poza=difde0(poz*2+1,(b+e)/2+1,e,ei);
      |              ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
horses.cpp: In function 'long long int calculeaza()':
horses.cpp:119:19: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  119 |         int pozac=pozant;
      |                   ^~~~~~
horses.cpp:120:27: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  120 |         pozant=difde0(1,1,n,pozant);
      |                           ^
horses.cpp:120:29: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  120 |         pozant=difde0(1,1,n,pozant);
      |                             ^~~~~~
horses.cpp:121:34: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  121 |         long long vmax=maxim(1,1,n,pozant,pozac-1);
      |                                  ^
horses.cpp:121:36: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  121 |         long long vmax=maxim(1,1,n,pozant,pozac-1);
      |                                    ^~~~~~
horses.cpp:128:28: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  128 |     return prod*produs(1,1,n,1,pozant-1);
      |                            ^
horses.cpp:128:38: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  128 |     return prod*produs(1,1,n,1,pozant-1);
      |                                ~~~~~~^~
horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:142:22: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  142 |     return calculeaza();
      |            ~~~~~~~~~~^~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:149:21: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  149 |     updateaintx(1,1,n,pos,val);
      |                     ^
horses.cpp:150:24: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  150 |     updateaintprod(1,1,n,pos,val);
      |                        ^
horses.cpp:152:19: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  152 |  return calculeaza();
      |         ~~~~~~~~~~^~
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:159:21: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  159 |     updateainty(1,1,n,pos,val);
      |                     ^
horses.cpp:161:19: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  161 |  return calculeaza();
      |         ~~~~~~~~~~^~

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