new file: P17554.cpp

P17554.cpp

@@ -0,0 +1,23 @@
+#include <bits/stdc++.h>
+using namespace std;
+int t;
+long long n;
+int main()
+{
+    scanf("%d", &t);
+    while (t--)
+    {
+        scanf("%lld", &n);
+        while (n % 2 == 0)
+            n /= 2;
+        while (n % 5 == 0)
+            n /= 5;
+        int cnt = 0;
+        while (n)
+        {
+            n /= 10, cnt++;
+        }
+        printf("%d\n", cnt);
+    }
+    return 0;
+}