week 119

1 files changed, 47 insertions, 0 deletions

diff --git a/challenge-116/paulo-custodio/cpp/ch-2.cpp b/challenge-116/paulo-custodio/cpp/ch-2.cpp
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+/*
+Challenge 116
+
+TASK #2 - Sum of Squares
+Submitted by: Mohammad Meraj Zia
+You are given a number $N >= 10.
+
+Write a script to find out if the given number $N is such that sum of squares
+of all digits is a perfect square. Print 1 if it is otherwise 0.
+
+Example
+Input: $N = 34
+Ouput: 1 as 3^2 + 4^2 => 9 + 16 => 25 => 5^2
+
+Input: $N = 50
+Output: 1 as 5^2 + 0^2 => 25 + 0 => 25 => 5^2
+
+Input: $N = 52
+Output: 0 as 5^2 + 2^2 => 25 + 4 => 29
+*/
+
+#include <iostream>
+#include <cmath>
+using namespace std;
+
+bool sum_of_squares_is_perfect_square(int num) {
+    if (num < 10) return false;
+
+    double sum = 0;
+    while (num > 0) {
+        int digit = num % 10;
+        num /= 10;
+        sum += digit*digit;
+    }
+
+    double sqrt_int = floor(sqrt(sum));
+    if (sqrt_int*sqrt_int == sum)
+        return true;
+    else
+        return false;
+}
+
+int main(int argc, char* argv[]) {
+    int n = 0;
+    if (argc == 2) n = atoi(argv[1]);
+    cout << (sum_of_squares_is_perfect_square(n) ? 1 : 0) << endl;
+}