add the last one.

Took approx. 3 hrs to complete homework.

pset5/6-people.c

@@ -0,0 +1,36 @@
+#include <math.h>
+#include <stdio.h>
+
+// Function prototype
+int checkf(float f);
+
+int main(void) {
+  // Initialize variables
+  int m, n;
+  int b, c;   // a -> 1, b -> 2 etc.
+  float a, d; // a -> 1, b -> 2 etc.
+  scanf("%i%i", &m, &n);
+
+  // Start brute forcing
+  for (b = 0; b <= n; b++) {
+    for (c = 0; c <= n; c++) {
+      d = (float)(n - m - b - c * 2) / 3;
+      if (checkf(d)) {
+        a = (float)(2 * m - n + c + d * 2);
+        if (checkf(a)) {
+          printf("%i %i %i\n", b, c, (int)d);
+        }
+      }
+    }
+  }
+
+  return 0;
+}
+
+int checkf(float f) {
+  if (floorf(f) == f && f >= 0) {
+    return 1;
+  } else {
+    return 0;
+  }
+}