2024.C语言合法标识符 - yogurt_莹

#include<stdio.h>

int main(){

         int n,a[100];

    scanf("%d",&n);

         for(int i=0;i<n;i++)

         scanf("%d",a[i]);     

         int flag,x=0,y=0;

         if(a[0]>\'a\'&&a[0]<\'z\'||a[0]>\'A\'&&a[0]<\'Z\'||a[0]==\'_\'){

                   for(int j=1;j<n;j++){

                            if(a[j]>\'a\'&&a[j]<\'z\'||a[j]>\'A\'&&a[j]<\'Z\'||a[j]==\'_\'||a[j]>\'0\'&&a[j]<\'9\')x++;

                       else y++;}

         if(y>0)printf("NO\n");

         else printf("YES\n");}

         else printf("NO\n");

         return 0;

}