Xiaotong sun patch 2

week2/exercise P1008 in LuoGu.cpp

@@ -0,0 +1,60 @@
+#include <stdio.h>
+
+int is_valid_hundreds_digit(int num);
+int is_hundreds(int num);
+int has_different_digits(int num);
+
+int main()
+{
+	int num, _double, triple;
+	for (int ones = 1; ones < 10; ones++) {
+		for (int tens = 1; tens < 10; tens++) {
+			if (ones == tens) {
+				continue;
+			} else {
+				for (int hundreds = 1; hundreds < 10; hundreds++) {
+					if (ones == hundreds || tens == hundreds) {
+						continue;
+					} else {
+						num = ones * 100 + tens * 10 + hundreds; // Get a three-digit number that is different for each digit.
+						_double = num * 2;
+						triple = num * 3;             // Get three numbers in the ratio of 1:2:3
+						if (is_valid_hundreds_digit(_double) && is_valid_hundreds_digit(triple)) {
+							// Output everything in ascending order.
+							printf("%d %d %d\n", num, _double, triple);
+						} else {
+							continue;
+						}
+					}
+				}
+			}
+		}
+	}
+	return 0;
+}
+
+int is_valid_hundreds_digit(int num)
+{
+	if (is_hundreds(num) && has_different_digits(num)) {
+		return 1;
+	}
+	return 0;
+}
+
+int is_hundreds(int num)
+{
+	if (num < 1000) {
+		return 1;
+	}
+	return 0;
+}
+
+int has_different_digits(int num)
+{
+	if (num % 10 != num / 10 % 10
+		&& num % 10 != num / 100
+		&& num / 10 % 10 != num / 100) {
+		return 1;
+	}
+	return 0;
+}