#include <stdio.h>

main(){
    int i,a[10];
    for(i=0;i<10;i++){
        a[i]=i;
    }
    for(i=0;i<10;i++){
        printf("a[%d]=%dn",i,a[i]);
    }
    printf("nn");
    for(i=9;i>=0;i--){
        printf("a[%d]=%dn",i,a[i]);
    }
}

#include <stdio.h>

int main(){
  int c,i,nwhite,nother;
  int ndigit[10];

  nwhite=nother=0;
  for(i=0;i<10;i++)
    ndigit[i]=0;
  while((c=getchar())!=EOF)
    if(c>='0'&&c<='9')
      ++ndigit[c-'0'];
    else if(c==' '||c=='n'||c=='t')
      ++nwhite;
    else
      ++nother;

    printf("digit=");
    for(i=0;i<10;i++)
      printf(" %d",ndigit[i]);
    printf(",white space =%d,other=%dn",nwhite,nother);
}

#include <stdio.h>

#define IN 1  /在单词内/
#defint OUT 0  /在单词外/

main(){
  int c, n1, nw, nc, state;

  state = OUT;
  n1=nw=nc=0;
  while((c=getchar())!=EOF){
    ++nc;
    if(c=='n')
      ++n1;
    if(c==' '||c=='n'||c=='t')
      state=OUT;
    else if(state==out){
      state=IN;
      ++nw;
    }
  }
  printf("%d %d %d n",n1,nw,nc);
}

#include <stdio.h>

main(){
  int c, n1;

  n1=0;
  while((c=getchar())!=EOF)
    if(c=='n')
      ++n1;
  printf("%d",n1);
}

#include <stdio.h>

int main(){
  int m, i;
  scanf("&d",m);
  for(i=2;i<=m;i++)
    if(m%i==0)
    break;
  if(i>m/2&&m!=1)
  printf("%d is a prime number!n",m);
  else
  printf("No"n);

  return 0;
}