add tests for task1

3. problem_ee/solution.c

@@ -0,0 +1,50 @@
+#include <stdio.h>
+#include <assert.h>
+#include <stdlib.h>
+
+#define ll long long
+
+void ee(ll x, ll y);
+
+int main(int argc, char *argv[])
+{
+  ll x = 0, y = 0;
+  int res;
+
+  
+  res = scanf("%lld %lld", &x, &y);
+  assert(res == 2);
+
+  ee(x, y);
+
+  return EXIT_SUCCESS;
+}
+
+void ee(ll x, ll y) {
+  ll x0 = 1, y0 = 0;
+  ll x1 = 0, y1 = 1;
+
+  while (y != 0) {
+    ll q = x / y;
+
+    ll t = x % y;
+    x = y;
+    y = t;
+
+    t = x1;
+    x1 = x0 - q * x1;
+    x0 = t;
+
+    t = y1;
+    y1 = y0 - q * y1;
+    y0 = t;
+  }
+
+  if (x < 0) {
+    x = -x;
+    x0 = -x0;
+    y0 = -y0;
+  }
+
+  printf("%lld %lld %lld\n", x0, y0, x);
+}