Submission #1049827

#	Time	Username	Problem	Language	Result	Execution time	Memory
1049827		TAhmed33	Horses (IOI15_horses)	C++98	34 / 100	1593 ms	12116 KiB

horses

#include "horses.h"
#include <bits/stdc++.h>
using namespace std;
const int MOD = 1e9 + 7;
int add (int a, int b) {
	a += b; if (a >= MOD) a -= MOD;
	return a;
}
int sub (int a, int b) {
	a -= b; if (a < 0) a += MOD;
	return a;
}
int mul (int a, int b) {
	return (a * 1ll * b) % MOD;
}
const int MAXN = 5e5 + 25;
int x[MAXN], y[MAXN], n;
int ans () {
	long double s = log2(x[0]);
	long double cur = s + log2(y[0]);
	int pos = 0;
	for (int i = 1; i < n; i++) {
		s += log2(x[i]); 
		long double t = s + log2(y[i]);
		if (t > cur + 1e-9) {
			cur = t; pos = i;
		}
	}
	int ret = 1;
	for (int i = 0; i <= pos; i++) {
		ret = mul(ret, x[i]);
	}
	ret = mul(ret, y[pos]);
	return ret;
}
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];
	}
	return ans();
}

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

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

Compilation message (stderr)

horses.cpp: In function 'int mul(int, int)':
horses.cpp:14:23: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   14 |  return (a * 1ll * b) % MOD;
      |         ~~~~~~~~~~~~~~^~~~~

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