some programs!!!

_others/others_test_cpp.cpp

@@ -0,0 +1,29 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+constexpr float ALLOWED_DIFF = 1e-6;
+
+std::tuple<int, double> sqrt_custom(double x) {
+    double est_prev = -1, est_curr = x;
+    int rounds = 0;
+    while (abs(est_curr - est_prev) > ALLOWED_DIFF) {
+        est_prev = est_curr;
+        // est_curr = 0.5 * (est_prev + x / est_prev);
+        est_curr = x / (2 * est_curr) + 0.5 * est_curr;
+        rounds++;
+    }
+    return std::make_tuple(rounds, est_curr);
+}
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    std::cin.tie(nullptr);
+    int x;
+    while (std::cin >> x) {
+        auto [rounds, ans] = sqrt_custom(x);
+        std::cout << rounds << " " << std::fixed << std::setprecision(2) << ans << std::endl;
+    }
+
+    return 0;
+}