12416 solved

12416.cpp

@@ -0,0 +1,34 @@
+#include <iostream>
+#include <cmath>
+using namespace std;
+
+#define REP(i, b, n) for (int i = b; i < n; i++)
+#define rep(i, n) REP(i, 0, n)
+
+int longest_spaces(string &input) {
+    int result = 0;
+    int tmp = 0;
+
+    rep (i, input.size()) {
+        if (input[i] == ' ') {
+            tmp++;
+        } else {
+            if (tmp > result)
+                result = tmp;
+
+            tmp = 0;
+        }
+    }
+
+    return result;
+}
+
+int main(void) {
+    string input;
+
+    while (getline (cin, input)) {
+        cout << ceil(log2(longest_spaces(input))) << endl;
+    }
+
+    return 0;
+}