Submission #206296

#	Time	Username	Problem	Language	Result	Execution time	Memory
206296		oko	Horses (IOI15_horses)	C++14	17 / 100	1589 ms	12132 KiB

horses

#include "horses.h"
#include <stdio.h>
#include <stdlib.h>
#include <bits/stdc++.h>
using namespace std;
long long n,a[500500],b[500500],mod=1e9+7;
long long slov()
{
    long long x=1,ans=0,st;
    for(int i=n-1;i>=0;i--)
    {
        x*=a[i];
        st=i;
        if(x>(long long)2e9)break;
    }
    x=1;
    if(st)ans=b[st-1];
    for(int i=st;i<n;i++)
    {
        x*=a[i];
        ans=max(ans,x*b[i]);
    }
    ans%=mod;
    for(int i=0;i<st;i++)
    {
        ans*=a[i];
        ans%=mod;
    }
    return ans;
}
int init(int N, int X[], int Y[])
{
    n=N;
    for(int i=0;i<n;i++)
    {
        a[i]=X[i];
        b[i]=Y[i];
    }
    return slov();
}
int updateX(int pos, int val)
{
    a[pos]=val;
    return slov();
}
int updateY(int pos, int val)
{
    b[pos]=val;
    return slov();
}

Compilation message (stderr)

horses.cpp: In function 'long long int slov()':
horses.cpp:10:16: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
     for(int i=n-1;i>=0;i--)
               ~^~
horses.cpp:18:15: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
     for(int i=st;i<n;i++)
               ^~
horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:39:16: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
     return slov();
            ~~~~^~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:44:16: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
     return slov();
            ~~~~^~
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:49:16: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
     return slov();
            ~~~~^~

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