#include <stdio.h>

int u, v = 10, w = 20, x = 30;

int task2(int a, int b, int c) {
	return a + b + c;
}

void task1() {
	u = task2(v, w, x);
}

int main() {
	task1();
	printf("u = %d\n", u); // should print 60
	return 0;
}