#include <stdio.h>
#include <stdlib.h>
int main(){
FILE *fp;
char str[100];
double f, max;

if ((fp = fopen("data.dat", "r")) == NULL) exit(1);
if(fgets(str, 256, fp) != NULL)
sscanf(str, "%lf", &max);
while (fgets(str, 256, fp) != NULL) {
sscanf(str, "%lf", &f);
if(max < f) max = f;
}
fclose(fp);
if ((fp = fopen("data.dat", "r")) == NULL) exit(1);
while (fgets(str, 256, fp) != NULL) {
sscanf(str, "%lf", &f);
if(max == f) printf("%s", str);
}
fclose(fp);
return 0;
}