Submission #28236

#	Time	Username	Problem	Language	Result	Execution time	Memory
28236		RayaBurong25_1	Horses (IOI15_horses)	C++14	100 / 100	193 ms	106696 KiB

horses

#include "horses.h"
#include <stdio.h>
#include <math.h>
#define MOD 1000000007LL
typedef struct node node;
struct node
{
	long long X, Y, Ans;
	double logX, logY, logAns;
};
node Seg[2000005];
long long x[500005], y[500005];
void calc(int cell)
{
	if (Seg[2*cell + 2].logAns + Seg[2*cell + 2].logY + Seg[2*cell + 1].logX > Seg[2*cell + 1].logAns + Seg[2*cell + 1].logY)
	{
		Seg[cell].X = (Seg[2*cell + 1].X*Seg[2*cell + 2].X)%MOD;
		Seg[cell].logX = Seg[2*cell + 1].logX + Seg[2*cell + 2].logX;
		Seg[cell].Y = Seg[2*cell + 2].Y;
		Seg[cell].logY = Seg[2*cell + 2].logY;
		Seg[cell].Ans = (Seg[2*cell + 1].X*Seg[2*cell + 2].Ans)%MOD;
		Seg[cell].logAns = Seg[2*cell + 1].logX + Seg[2*cell + 2].logAns;
	}
	else
	{
		Seg[cell].X = (Seg[2*cell + 1].X*Seg[2*cell + 2].X)%MOD;
		Seg[cell].logX = Seg[2*cell + 1].logX + Seg[2*cell + 2].logX;
		Seg[cell].Y = Seg[2*cell + 1].Y;
		Seg[cell].logY = Seg[2*cell + 1].logY;
		Seg[cell].Ans = Seg[2*cell + 1].Ans;
		Seg[cell].logAns = Seg[2*cell + 1].logAns;
	}
	// printf("%llu %llu %llu\n", Seg[cell].X, Seg[cell].Y, Seg[cell].Ans);
}
void makeTree(int s, int e, int cell)
{
	if (s == e)
	{
		Seg[cell].X = x[s];
		Seg[cell].Y = y[s];
		Seg[cell].logX = log(x[s]);
		Seg[cell].logY = log(y[s]);
		Seg[cell].Ans = x[s];
		Seg[cell].logAns = Seg[cell].logX;
		return;
	}
	int m = (s + e)/2;
	makeTree(s, m, 2*cell + 1);
	makeTree(m + 1, e, 2*cell + 2);
	calc(cell);
}
int n;
int init(int N, int X[], int Y[])
{
	int i;
	n = N;
	for (i = 0; i < N; i++)
		x[i] = (long long) X[i];
	for (i = 0; i < N; i++)
		y[i] = (long long) Y[i];
	makeTree(0, N - 1, 0);
	long long r = (Seg[0].Y*Seg[0].Ans)%MOD;
	return (int) r;
}
void updX(int pos, long long val, int s, int e, int cell)
{
	if (s == e)
	{
		Seg[cell].X = val;
		Seg[cell].logX = log(val);
		Seg[cell].Ans = Seg[cell].X;
		Seg[cell].logAns = Seg[cell].logX;
		return;
	}
	int m = (s + e)/2;
	if (pos <= m)
		updX(pos, val, s, m, 2*cell + 1);
	else
		updX(pos, val, m + 1, e, 2*cell + 2);
	calc(cell);
}
int updateX(int pos, int val)
{
	updX(pos, (long long) val, 0, n - 1, 0);
	long long r = (Seg[0].Y*Seg[0].Ans)%MOD;
	return (int) r;
}
void updY(int pos, long long val, int s, int e, int cell)
{
	if (s == e)
	{
		Seg[cell].Y = val;
		Seg[cell].logY = log(val);
		return;
	}
	int m = (s + e)/2;
	if (pos <= m)
		updY(pos, val, s, m, 2*cell + 1);
	else
		updY(pos, val, m + 1, e, 2*cell + 2);
	calc(cell);
}
int updateY(int pos, int val)
{
	updY(pos, (long long) val, 0, n - 1, 0);
	long long r = (Seg[0].Y*Seg[0].Ans)%MOD;
	return (int) r;
}

Compilation message (stderr)

horses.cpp: In function 'void makeTree(int, int, int)':
horses.cpp:41:28: warning: conversion to 'double' from 'long long int' may alter its value [-Wconversion]
   Seg[cell].logX = log(x[s]);
                            ^
horses.cpp:42:28: warning: conversion to 'double' from 'long long int' may alter its value [-Wconversion]
   Seg[cell].logY = log(y[s]);
                            ^
horses.cpp: In function 'void updX(int, long long int, int, int, int)':
horses.cpp:70:27: warning: conversion to 'double' from 'long long int' may alter its value [-Wconversion]
   Seg[cell].logX = log(val);
                           ^
horses.cpp: In function 'void updY(int, long long int, int, int, int)':
horses.cpp:93:27: warning: conversion to 'double' from 'long long int' may alter its value [-Wconversion]
   Seg[cell].logY = log(val);
                           ^

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