11986 solved

11986.cpp

@@ -0,0 +1,37 @@
+#include <iostream>
+#include <cmath>
+using namespace std;
+
+int main(void) {
+    int t, case_num = 0;
+    unsigned long long n, precalc[60];
+
+    precalc[0] = 1;
+    for (int i = 1; i < 60; i++)
+        precalc[i] = precalc[i-1] * 2;
+
+    cin >> t;
+
+    while (t--) {
+        case_num++;
+        cout << "Case " << case_num << ": ";
+
+        cin >> n;
+
+        if (n == 0) {
+            cout << "0" << endl;
+            continue;
+        }
+
+        n++;
+
+        for (int i = 0; i < 60; i++) {
+            if (n <= precalc[i]) {
+                cout << i << endl;
+                break;
+            }
+        }
+    }
+
+    return 0;
+}