Tulip And Numbers

problem statement is here

#include<stdio.h>
int main(){
int a,b,c,d,i,j,n,m,t,ar,x=1,br[100005];
scanf("%d",&t);
while(t--){
scanf("%d %d",&n,&m);
scanf("%d",&ar);
a=ar;
br[0]=0;
br[1]=1;
for(i=1;i<n;i++){
scanf("%d",&ar);
if(a==ar){
br[i+1]=br[i];
}else{
br[i+1]=br[i]+1;
a=ar;
}
}
printf("Case %d:\n",x);
x++;
for(i=0;i<m;i++){
scanf("%d %d",&a,&b);
if(a==1){
c=br[b];
}else{
if(br[a]==br[a-1]){
c=br[b]-br[a-1]+1;
}else{
c=br[b]-br[a-1];
}
}
printf("%d\n",c);
}

}
return 0;
}