Finish 2017.

2017/i23.c

@@ -0,0 +1,65 @@
+#include <stdio.h>
+
+unsigned int mul_count = 0;
+
+int mul(int a, int b) {
+    mul_count++;
+    return a * b;
+}
+
+int main() {
+    for (int a = 0; a < 2; a++) {
+        int b = 0, c = 0, d = 0, e = 0, f = 0, g = 1, h = 0;
+        b = 67;
+        c = b;
+        if (a != 0) {
+            b = mul(b, 100);
+            b += 100000;
+            c = b;
+            c += 17000;
+        }
+
+        while (1) {
+            f = 1;
+            d = 2;
+
+            while (g != 0)
+            {
+                e = 2;
+                while (g != 0) {
+                    if (b % d == 0) {
+                        int e_required = b / d;
+                        if (e_required >= 2 && e_required <= b) {
+                            f = 0;
+                        }
+                    }
+                    mul_count += (b - e);
+                    g = 0;
+                }
+
+                d += 1;
+                g = d;
+                g -= b;
+            }
+
+            if (f == 0) {
+                h += 1;
+            }
+
+            g = b;
+            g -= c;
+            if (g != 0) {
+                b += 17;
+            } else {
+                break;
+            }
+        }
+        if (a == 0) {
+            printf("%d\n", mul_count);
+        } else {
+            printf("%d\n", h);
+        }
+    }
+
+    return 0;
+}