>>600
EOF (Ctrl+D or Ctrl+Z) で入力終了
#include <stdio.h>

int main(void){
int minimum, num, is_first=1;

while(scanf("%d", &num)==1){
if(is_first || num<minimum)
minimum=num;
is_first=0;
}
if(!is_first)
printf("\nminimum : %d\n", minimum);

return 0;
}