#include <ctype.h>
#include <stdio.h>
#include <string.h>
 
int validar_saldo(char *str) {
    /* DEBUG */
    fprintf(stderr, "DEBUG: valor passado: [%s]\n", str);
 
    if (*str == '-') str++;
    if (!isdigit((unsigned char)*str)) return 0; /* empty strings return false */
    while (*str) {
        if (!isdigit((unsigned char)*str)) return 0;
        str++;
    }
    return 1;
}
 
int main(void) {
    char line[100];
 
    while (fgets(line, sizeof line, stdin)) {
        char *componente;
        componente = strtok(line, " "); /* primeiro componente */
        componente = strtok(NULL, " "); /* segundo componente */
        printf("Resultado: %d\n", validar_saldo(componente));
    }
    return 0;
}

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123-55555-1 10000    0      OK
123-55555-2 ERRO    50     ERRO
123-55555-3 -5000    0      OK
123-55555-4 3-50    10     ERRO
123-55555-5 764abc 100     ERRO
123-55555-6 0      150      OK
123-55555-7     0  150      OK