Submission #402376

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Source Code Expand

#include<stdio.h>

int main(){
  
  char s[110],d[3]={"bca"};
  int i,j,k,n,c=0;

  scanf("%d%s",&n,s);
  if((n%2==0)||(n==1&&s[0]!='b')){puts("-1");return 0;}
  if(s[0]=='b') k=0;
  else if(s[0]=='a') k=2;
  else if(s[0]=='c') k=1;
  else {puts("-1");return 0;}
  for(i=k,j=0;j<n;i++,j++) if(d[i%3]!=s[j]) c=1;
  printf("%d\n",!c?(n-1)/2:-1);				
  return 0;
}

Submission Info

Compile Error

./Main.c: In function ‘main’:
./Main.c:8:3: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%s",&n,s);
   ^

Judge Result