Submission #82987

#	Time	Username	Problem	Language	Result	Execution time	Memory
82987		arman_ferdous	Horses (IOI15_horses)	C++17	34 / 100	1578 ms	21856 KiB

horses

#include <bits/stdc++.h>
#include "horses.h"
using namespace std;

typedef long long ll;
const int N = 5e5+10;
const int MOD = 1e9+7;

int n;
double x[N], y[N];

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];

	double lg = log(x[0]) + log(y[0]);
	double mx = lg; int idx = 0;
	for(int i = 1; i < n; i++) {
		lg = lg - log(y[i-1]) + log(x[i]) + log(y[i]);
		if(lg > mx) mx = lg, idx = i;
	}
	ll ans = 1;
	for(int i = 0; i <= idx; i++)
		ans = ans * (ll)x[i] % MOD;
	ans = ans * (ll)y[idx] % MOD;
	return ans;
}

int updateX(int pos, int val) {	
	x[pos] = val;
	double lg = log(x[0]) + log(y[0]);
	double mx = lg; int idx = 0;
	for(int i = 1; i < n; i++) {
		lg = lg - log(y[i-1]) + log(x[i]) + log(y[i]);
		if(lg > mx) mx = lg, idx = i;
	}
	ll ans = 1;
	for(int i = 0; i <= idx; i++)
		ans = ans * (ll)x[i] % MOD;
	ans = ans * (ll)y[idx] % MOD;
	return ans;
}

int updateY(int pos, int val) {
	y[pos] = val;
	double lg = log(x[0]) + log(y[0]);
	double mx = lg; int idx = 0;
	for(int i = 1; i < n; i++) {
		lg = lg - log(y[i-1]) + log(x[i]) + log(y[i]);
		if(lg > mx) mx = lg, idx = i;
	}
	ll ans = 1;
	for(int i = 0; i <= idx; i++)
		ans = ans * (ll)x[i] % MOD;
	ans = ans * (ll)y[idx] % MOD;
	return ans;
}

Compilation message (stderr)

horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:12:33: warning: declaration of 'N' shadows a global declaration [-Wshadow]
 int init(int N, int X[], int Y[]) {
                                 ^
horses.cpp:6:11: note: shadowed declaration is here
 const int N = 5e5+10;
           ^
horses.cpp:27:9: warning: conversion to 'int' from 'll {aka long long int}' may alter its value [-Wconversion]
  return ans;
         ^~~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:42:9: warning: conversion to 'int' from 'll {aka long long int}' may alter its value [-Wconversion]
  return ans;
         ^~~
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:57:9: warning: conversion to 'int' from 'll {aka long long int}' may alter its value [-Wconversion]
  return ans;
         ^~~

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