Submission #158593

#	Time	Username	Problem	Language	Result	Execution time	Memory
158593		oolimry	Horses (IOI15_horses)	C++14	34 / 100	1567 ms	23800 KiB

horses

#include "horses.h"
#include <bits/stdc++.h>
using namespace std;
long long mod = 1000000007;
long long x[500005];
long long y[500005];
double lnx[500005];
double lny[500005];
int n;
long long answer(){
	double acc = 0;
	
	double best = 0;
	int bestpos = 0;
	for(int i = 0;i < n;i++){
		acc += lnx[i];
		//printf("%d %f\n",i,acc + lny[i]);
		if(acc + lny[i] > best){
			best = acc + lny[i];
			bestpos = i;
		}
	}
	
	long long value = 1;
	for(int i = 0;i <= bestpos;i++){
		value *= x[i];
		value %= mod;
	}
	value *= y[bestpos];
	value %= mod;
	return value;
	
}
int init(int N, int X[], int Y[]) {
	n = N;
	for(int i = 0;i < N;i++){
		x[i] = X[i];
		y[i] = Y[i];
		lnx[i] = (double)log((double)X[i]);
		lny[i] = (double)log((double)Y[i]);
		//printf("%f %f\n",lnx[i],lny[i]);
	}
	return answer();
}

int updateX(int pos, int val) {	
	x[pos] = val;
	lnx[pos] = (double)log((double)x[pos]);
	return answer();
}

int updateY(int pos, int val) {
	y[pos] = val;
	lny[pos] = (double)log((double)y[pos]);
	return answer();
}

Compilation message (stderr)

horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:43:15: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
  return answer();
         ~~~~~~^~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:49:15: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
  return answer();
         ~~~~~~^~
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:55:15: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
  return answer();
         ~~~~~~^~

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