poj 2872 Spelling Be

poj 2872 Spelling Be

#include <cstdio>#include <cstring>#include <string.h>#include <iostream>#include <algorithm>#include <cmath>using namespace std;typedef long long LL;struct word{    char s[200];}a[50001];int n;char b[200];bool cmp(struct word x,struct word y){    return strcmp(x.s,y.s)<0;}bool gao(char *x){    int l=0,r=n-1,mid;    while(l<=r)    {        int mid=(l+r)/2;        if(strcmp(x,a[mid].s)<0) r=mid-1;        else if(strcmp(x,a[mid].s)>0) l=mid+1;        else return true;    }    return false;}int main(){    int m;    scanf("%d",&n);    for(int i=0;i<n;i++)        scanf("%s",a[i].s);    sort(a,a+n,cmp);    scanf("%d",&m);    for(int i=0;i<m;i++)    {        int flag=0;        while(scanf("%s",b)&&strcmp(b,"-1")!=0)        { if(!gao(b)) {     if(flag==0)     {         flag=1;         printf("Email %d is not spelled correctly.n",i+1);     }     printf("%sn",b); }        }        if(!flag) printf("Email %d is spelled correctly.n",i+1);    }    printf("End of Outputn");    return 0;}