Submission #597100

#	Time	Username	Problem	Language	Result	Execution time	Memory
597100		Apiram	Horses (IOI15_horses)	C++14	17 / 100	1563 ms	9292 KiB

horses

#include "horses.h"
#include <bits/stdc++.h>
using namespace std;
const int mod = 1e9 + 7;
int init(int N, int X[], int Y[]) {
	int ans = 0;
	vector<long long>numhorse(N + 1,0);
	numhorse[0] = 1;
	for (int i = 0;i<N;++i){
		numhorse[i + 1] = (numhorse[i] * X[i])%mod;
	}
	//(numhorse[i + 1] * Y[i] >  y[j] * number of horse[j + 1]
	long long maxxy = Y[N - 1],index = N - 1;
	ans = (numhorse[N] * Y[N - 1])%mod;
	for (int i = N - 1;i>=1;--i){
		long long temp = 1;
		bool ok = false;
		for (int j = i;j <=index;++j){
			temp = (temp * X[j]);
			if (temp > 1e9)ok = true;
		}
		//cout<<temp<<" "<<Y[i - 1] / Y[index]<<" "<<i<<" "<<maxxy<<" "<<index<<'\n';
		if (Y[i - 1] > maxxy && (ok || temp <= Y[i - 1] / Y[index])){
			maxxy = Y[i - 1];
			index = i - 1;
			ans = (numhorse[i] * Y[i - 1])%mod;
		}
	}
	return ans;
}

int updateX(int pos, int val) {	
	return 0;
}

int updateY(int pos, int val) {
	return 0;
}

Compilation message (stderr)

horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:14:32: warning: conversion from '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'} to 'int' may change value [-Wconversion]
   14 |  ans = (numhorse[N] * Y[N - 1])%mod;
      |        ~~~~~~~~~~~~~~~~~~~~~~~~^~~~
horses.cpp:20:8: warning: conversion from 'long long int' to 'double' may change value [-Wconversion]
   20 |    if (temp > 1e9)ok = true;
      |        ^~~~
horses.cpp:26:34: warning: conversion from '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'} to 'int' may change value [-Wconversion]
   26 |    ans = (numhorse[i] * Y[i - 1])%mod;
      |          ~~~~~~~~~~~~~~~~~~~~~~~~^~~~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:32:17: warning: unused parameter 'pos' [-Wunused-parameter]
   32 | int updateX(int pos, int val) {
      |             ~~~~^~~
horses.cpp:32:26: warning: unused parameter 'val' [-Wunused-parameter]
   32 | int updateX(int pos, int val) {
      |                      ~~~~^~~
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:36:17: warning: unused parameter 'pos' [-Wunused-parameter]
   36 | int updateY(int pos, int val) {
      |             ~~~~^~~
horses.cpp:36:26: warning: unused parameter 'val' [-Wunused-parameter]
   36 | int updateY(int pos, int val) {
      |                      ~~~~^~~

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