Pagini recente » Cod sursa (job #1243198) | Cod sursa (job #868700) | Cod sursa (job #2742996) | Cod sursa (job #1473034) | Cod sursa (job #1938641)
#include <bits/stdc++.h>
#define Bucket_size 8
using namespace std;
class Reader
{
public:
Reader() {}
Reader(const char *file_name)
{
input_file = fopen(file_name, "r");
cursor = 0;
fread(buffer, SIZE, 1, input_file);
}
inline Reader &operator >>(int &n)
{
while(buffer[cursor] < '0' || buffer[cursor] > '9')
{
advance();
}
n = 0;
while('0' <= buffer[cursor] && buffer[cursor] <= '9')
{
n = n * 10 + buffer[cursor] - '0';
advance();
}
return *this;
}
private:
FILE *input_file;
static const int SIZE = 1 << 17;
int cursor;
char buffer[SIZE];
inline void advance()
{
++ cursor;
if(cursor == SIZE)
{
cursor = 0;
fread(buffer, SIZE, 1, input_file);
}
}
};
class Writer
{
public:
Writer(const char *name):
m_stream(name)
{
memset(m_buffer, 0, sizeof(m_buffer));
m_pos = 0;
}
Writer& operator<<(int a)
{
int many = 0;
do
{
digit_buffer[many++] = a % 10 + '0';
a /= 10;
}
while (a > 0);
for (int i = many - 1; i >= 0; --i)
putchar(digit_buffer[i]);
return *this;
}
Writer& operator<<(const char *s)
{
for (; *s; ++s)
putchar(*s);
return *this;
}
~Writer()
{
m_stream.write(m_buffer, m_pos);
}
private:
void putchar(char c)
{
m_buffer[m_pos++] = c;
if (m_pos == kBufferSize)
{
m_stream.write(m_buffer, m_pos);
m_pos = 0;
}
}
static const int kBufferSize = 32768;
ofstream m_stream;
char m_buffer[kBufferSize];
char digit_buffer[30];
int m_pos;
};
Reader f ("algsort.in");
Writer g ("algsort.out");
int n;
vector <unsigned int> V;
void radixsort(int bits)
{
vector <unsigned int> Sorted_Bucket[(1<<Bucket_size)];
for(auto it:V) Sorted_Bucket[(it>>bits)&((1<<Bucket_size)-1)].push_back(it);
for(int i=0,n=0; i<(1<<Bucket_size); ++i)
for(auto it:Sorted_Bucket[i]) V[n++]=it;
}
int main()
{
int x;
f>>n;
for(int i=0; i<n; ++i) f>>x,V.push_back(x);
for(int i=0; i<32; i+=Bucket_size) radixsort(i);
for(auto it:V) g<<it<<" ";
}