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

int main(int argc, char *argv[]){
    
    if(argc < 2){
        fprintf(stderr,"usage....\n");
        exit(1);
    }
    
    FILE *f = fopen(argv[1],"w");
    if(f == NULL){
        perror("");
        exit(1);
    }
    
    int num;
    while(scanf("%d",&num) != EOF){
        fprintf(f,"%d\n",num);
    }   

    fclose(f);
    return 0;
}