Submission #718512

#	Time	Username	Problem	Language	Result	Execution time	Memory
718512		mseebacher	Horses (IOI15_horses)	C++17	17 / 100	1556 ms	8144 KiB

horses

#include "horses.h"
#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <string>
#include <vector>
#include <cmath>
#include <cstring>
#include <algorithm>
#include <iomanip>
#include <map>
#include <set>
#include <stack>
#include <queue>
#include <functional>
#include <iostream>
#include <fstream>
#include <string>

using namespace std;

vector<int> x;
vector<int> y;
int n;

double logp(int i){
	return log2(i);
}

int expp(double i){
	return round(pow(2,i));
}

const double MOD = logp(1e9+7);



int calc(){
	double horses = logp(1);
	double p = 0;
	for(int i = 0;i<n;i++){
		horses += logp(x[i]);
		p = max(p,horses+logp(y[i]));
	}
	int a = p/MOD;
	p -= a*MOD;
	return expp(p);
}

int init(int N, int X[], int Y[]) {
	n = N;
	x.assign(N,0);
	y.assign(N,0);
	for(int i = 0;i<n;i++){
		x[i] = X[i];
		y[i] = Y[i];
	}
	return calc();
}

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

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

Compilation message (stderr)

horses.cpp: In function 'int expp(double)':
horses.cpp:31:14: warning: conversion from 'double' to 'int' may change value [-Wfloat-conversion]
   31 |  return round(pow(2,i));
      |         ~~~~~^~~~~~~~~~
horses.cpp: In function 'int calc()':
horses.cpp:45:11: warning: conversion from 'double' to 'int' may change value [-Wfloat-conversion]
   45 |  int a = p/MOD;
      |          ~^~~~

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