What is the output of this program? #include<stdio.h> #include<pthread.h> int a; void *fun_t(void *arg); void *fun_t(void *arg) { a = 20; pthread_exit("Bye"); } int main() { pthread_t pt; void *res_t; a = 10; if(pthread_create(&pt,NULL,fun_t,NULL) != 0) perror("pthread_create"); if(pthread_join(pt,&res_t) != 0) perror("pthread_join"); printf("%d\n",a); return 0; }

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