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Cod sursa(job #443305)
#include <cstdio>
#include <algorithm>
using namespace std;
//<parsing>
FILE* fin=fopen("algsort.in","r");
const unsigned maxb=8192;
char buf[maxb];
unsigned ptr=0;
inline unsigned getInt(){
unsigned nr=0;
while(buf[ptr]<'0'||'9'<buf[ptr])
if(++ptr>=maxb)
fread(buf,maxb,1,fin),ptr=0;
while('0'<=buf[ptr]&&buf[ptr]<='9'){
nr=nr*10+buf[ptr]-'0';
if(++ptr>=maxb)
fread(buf,maxb,1,fin),ptr=0;
}
return nr;
}
//</parsing>
FILE* fout=fopen("algsort.out","w");
#define MAXN 500005
#define BASE 1000
#define max(a,b) (((a)>(b))?(a):(b))
int n,vec[MAXN],b[MAXN],maxv=-1;
void radixSort(){
int exp=1;
while(maxv/exp>0){
int bucket[BASE]={0};
for(int i=0;i<n;++i)
++bucket[vec[i]/exp%BASE];
for(int i=1;i<BASE;++i)
bucket[i]+=bucket[i-1];
for(int i=n-1;i>=0;--i)
b[--bucket[vec[i]/exp%BASE]]=vec[i];
for(int i=0;i<n;++i){
vec[i]=b[i];
}
exp*=BASE;
}
}
int main(){
n=getInt();
for(int i=0;i<n;i++){
vec[i]=getInt();
maxv=max(vec[i],maxv);
}
radixSort();
for(int i=0;i<n;i++){
fprintf(fout,"%d ",vec[i]);
}
fclose(fin);
fclose(fout);
return 0;
}