求助，#1wa，#6tle，其它ac

#include<stdio.h>
const int Max=1e6+10;
int N,M,ans[Max];
void er(int q){
    int begin=1,end=N,mid;
    while(begin<=end){
         mid=begin+(end-begin)/2;
        if(ans[mid]==q) break;
     else if(ans[mid]>q) end=mid-1;
        else begin=mid+1;
    }
    while(ans[mid-1]==q) mid--;
    if(ans[mid]==q) printf("%d ",mid);
    else printf("-1 ");
    return ;
}
int main(){
    scanf("%d %d",&N,&M);
    for(int i=1;i<=N;i++) scanf("%d",&ans[i]);
    for(int i=1;i<=M;i++){
        int n;
        scanf("%d",&n);
        er(n);
    }
    return 0;
}

求助，#1wa，#6tle，其它ac