Submission #204766

#	Time	Username	Problem	Language	Result	Execution time	Memory
204766		TAISA_	Horses (IOI15_horses)	C++14	34 / 100	31 ms	12280 KiB

horses

#include "horses.h"
#include <bits/stdc++.h>
using namespace std;
using ll=long long;
int x[500000],y[500000];
int n;
const ll mod=1000000007LL;
int calc(){
	vector<ll> s(n);
	s[0]=x[0];
	for(int i=1;i<n;i++){
		s[i]=s[i-1]*x[i]%mod;
	}
	ll id=n-1,t=x[n-1];
	for(int i=n-2;i>=0;i--){
		if(y[i]>t*y[id]){
			id=i;
			t=1;
		}
		t*=x[i];
		if(t>=mod){
			break;
		}
	} 
	return y[id]*s[id]%mod;
}
int init(int N, int X[], int Y[]) {
	n=N;
	assert(n<=1000);
	for(int i=0;i<n;i++){
		x[i]=X[i];
		y[i]=Y[i];
	}
	return calc();
}
int updateX(int pos, int val) {	
	x[pos]=val;
	return calc();
}

int updateY(int pos, int val) {
	y[pos]=val;
	return calc();
}

Compilation message (stderr)

horses.cpp: In function 'int calc()':
horses.cpp:25:20: warning: conversion to 'int' from '__gnu_cxx::__alloc_traits<std::allocator<long long int> >::value_type {aka long long int}' may alter its value [-Wconversion]
  return y[id]*s[id]%mod;
         ~~~~~~~~~~~^~~~

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