제출 #284494

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
284494		Shafin666	말 (IOI15_horses)	C++14	34 / 100	1587 ms	19960 KiB

horses

#include "horses.h"
#include <bits/stdc++.h>
#define pb push_back
#define pii pair<ll, ll>
#define nyan "(=^･ω･^=)"
#define read_input         freopen("in.txt","r", stdin)
#define print_output       freopen("out.txt","w", stdout)
typedef long long ll;
typedef long double ld;
using namespace std;

const int maxn = 5e5+10, mod = 1e9+7;
ll x[maxn], y[maxn], n;
double lgx[maxn];

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];

	lgx[0] = log(x[0]);
	for(int i = 1; i < N; i++) lgx[i] = lgx[i-1] + log(x[i]);

	double mx = -1; int ans = 0;
	for(int i = 0; i < N; i++) {
		double now = lgx[i] + log(y[i]);
		if(now >= mx) {
			mx = now; ans = i;
		}
	}

	ll ret = 1;
	for(int i = 0; i <= ans; i++) {
		ret = (ret * x[i]) % mod;
	} ret = (ret * y[ans]) % mod;

	return ret;
}

int updateX(int pos, int val) {	
	x[pos] = val;

	lgx[0] = log(x[0]);
	for(int i = 1; i < n; i++) lgx[i] = lgx[i-1] + log(x[i]);

	double mx = -1; int ans = 0;
	for(int i = 0; i < n; i++) {
		double now = lgx[i] + log(y[i]);
		if(now >= mx) {
			mx = now; ans = i;
		}
	}

	ll ret = 1;
	for(int i = 0; i <= ans; i++) {
		ret = (ret * x[i]) % mod;
	} ret = (ret * y[ans]) % mod;

	return ret;
}

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

	lgx[0] = log(x[0]);
	for(int i = 1; i < n; i++) lgx[i] = lgx[i-1] + log(x[i]);

	double mx = -1; int ans = 0;
	for(int i = 0; i < n; i++) {
		double now = lgx[i] + log(y[i]);
		if(now >= mx) {
			mx = now; ans = i;
		}
	}

	ll ret = 1;
	for(int i = 0; i <= ans; i++) {
		ret = (ret * x[i]) % mod;
	} ret = (ret * y[ans]) % mod;

	return ret;
}

컴파일 시 표준 에러 (stderr) 메시지

horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:36:9: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   36 |  return ret;
      |         ^~~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:58:9: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   58 |  return ret;
      |         ^~~
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:80:9: warning: conversion from 'll' {aka 'long long int'} to 'int' may change value [-Wconversion]
   80 |  return ret;
      |         ^~~

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