include <stdio.h>
#include <stdlib.h>
#include <string.h>

void main() {

typedef struct {
      int x;
      int g;
      char z[20];
      } Student;
 Student a1;
 int cont=1,i;
 char s[20], c;
 FILE *fp;
 fp=fopen("dat.txt","w");
 if (fp == NULL) {printf("Error opening the file\n"); exit(1);}
 while ( cont ) {
    fgets(s, 19, stdin);
    sscanf(s, "%d", &i);
    if(i == 0) {cont=0; break;}
    a1.x=i;
    /*
    scanf("%c", &c);
    scanf("%c", &c);   */
    fgets(s, 19, stdin);
    a1.g=s[0];
    //scanf("%c", &c);

    //scanf("%s",s);
    fgets(s, 19, stdin);
    s[strlen(s)-1]='\0';
    strcpy(a1.z, s);
    fwrite(&a1, sizeof(a1), 1, fp);
    }
 fclose(fp);

}