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#include <stdio.h>
#define N 1000
int main(){
int i, j, a[n];
a[0] = 0;
a[1] = 0;
for(i = 2; i < N; i++)
{
a[i] = 1;
}
for(i = 2; i < N; i++)
{
if(a[i])
{
for(j = i; j < N/i; j++) a[i*j] = 0;
}
}
for(i = 2; i < N; i++)
if(a[i]) printf("%4d ", i);
printf("\n")
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