ADDED   SRM/556-U/2C.cpp
Index: SRM/556-U/2C.cpp
==================================================================
--- SRM/556-U/2C.cpp
+++ SRM/556-U/2C.cpp
@@ -0,0 +1,79 @@
+#include <iostream>
+#include <sstream>
+#include <iomanip>
+#include <vector>
+#include <string>
+#include <map>
+#include <set>
+#include <algorithm>
+#include <numeric>
+#include <iterator>
+#include <functional>
+#include <complex>
+#include <queue>
+#include <stack>
+#include <cmath>
+#include <cassert>
+using namespace std;
+typedef long long LL;
+typedef long double LD;
+typedef complex<LD> CMP;
+
+class LeftRightDigitsGame { public:
+	string minNumber(string digits)
+	{
+		string cur, nonzero;
+		for(int i=0; i<digits.size(); ++i) {
+			if(digits[i] != '0')
+				if(!nonzero.empty() && nonzero[0]=='0')
+					nonzero = digits[i]+cur;
+				else
+					nonzero = min(digits[i]+cur, nonzero+digits[i]);
+			else
+				nonzero = nonzero+digits[i];
+			cur = min(cur+digits[i], digits[i]+cur);
+		}
+		return nonzero;
+	}
+};
+
+// BEGIN CUT HERE
+#include <ctime>
+double start_time; string timer()
+ { ostringstream os; os << " (" << int((clock()-start_time)/CLOCKS_PER_SEC*1000) << " msec)"; return os.str(); }
+template<typename T> ostream& operator<<(ostream& os, const vector<T>& v)
+ { os << "{ ";
+   for(typename vector<T>::const_iterator it=v.begin(); it!=v.end(); ++it)
+   os << '\"' << *it << '\"' << (it+1==v.end() ? "" : ", "); os << " }"; return os; }
+void verify_case(const string& Expected, const string& Received) {
+ bool ok = (Expected == Received);
+ if(ok) cerr << "PASSED" << timer() << endl;  else { cerr << "FAILED" << timer() << endl;
+ cerr << "\to: \"" << Expected << '\"' << endl << "\tx: \"" << Received << '\"' << endl; } }
+#define CASE(N) {cerr << "Test Case #" << N << "..." << flush; start_time=clock();
+#define END	 verify_case(_, LeftRightDigitsGame().minNumber(digits));}
+int main(){
+
+CASE(0)
+	string digits = "565"; 
+	string _ = "556"; 
+END
+CASE(1)
+	string digits = "9876543210"; 
+	string _ = "1234567890"; 
+END
+CASE(2)
+	string digits = "8016352"; 
+	string _ = "1086352"; 
+END
+CASE(3)
+	string digits = "01"; 
+	string _ = "10"; 
+END
+/*
+CASE(4)
+	string digits = ; 
+	string _ = ; 
+END
+	*/
+}
+// END CUT HERE