Submission #597110

#	Time	Username	Problem	Language	Result	Execution time	Memory
597110		Apiram	Horses (IOI15_horses)	C++14	34 / 100	1584 ms	12216 KiB

horses

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

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

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

Compilation message (stderr)

horses.cpp: In function 'int solve()':
horses.cpp:17:32: 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]
   17 |  ans = (numhorse[N] * y[N - 1])%mod;
      |        ~~~~~~~~~~~~~~~~~~~~~~~~^~~~
horses.cpp:23:8: warning: conversion from 'long long int' to 'double' may change value [-Wconversion]
   23 |    if (temp > 1e9)ok = false;
      |        ^~~~
horses.cpp:29:34: 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]
   29 |    ans = (numhorse[i] * y[i - 1])%mod;
      |          ~~~~~~~~~~~~~~~~~~~~~~~~^~~~

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