1c60f8bc27 2011-12-28        kinaba: #include <iostream>
1c60f8bc27 2011-12-28        kinaba: #include <sstream>
1c60f8bc27 2011-12-28        kinaba: #include <iomanip>
1c60f8bc27 2011-12-28        kinaba: #include <vector>
1c60f8bc27 2011-12-28        kinaba: #include <string>
1c60f8bc27 2011-12-28        kinaba: #include <map>
1c60f8bc27 2011-12-28        kinaba: #include <set>
1c60f8bc27 2011-12-28        kinaba: #include <algorithm>
1c60f8bc27 2011-12-28        kinaba: #include <numeric>
1c60f8bc27 2011-12-28        kinaba: #include <iterator>
1c60f8bc27 2011-12-28        kinaba: #include <functional>
1c60f8bc27 2011-12-28        kinaba: #include <complex>
1c60f8bc27 2011-12-28        kinaba: #include <queue>
1c60f8bc27 2011-12-28        kinaba: #include <stack>
1c60f8bc27 2011-12-28        kinaba: #include <cmath>
1c60f8bc27 2011-12-28        kinaba: #include <cassert>
1c60f8bc27 2011-12-28        kinaba: #include <cstring>
1c60f8bc27 2011-12-28        kinaba: #ifdef __GNUC__
1c60f8bc27 2011-12-28        kinaba: #include <ext/hash_map>
1c60f8bc27 2011-12-28        kinaba: #define unordered_map __gnu_cxx::hash_map
1c60f8bc27 2011-12-28        kinaba: #else
1c60f8bc27 2011-12-28        kinaba: #include <unordered_map>
1c60f8bc27 2011-12-28        kinaba: #endif
1c60f8bc27 2011-12-28        kinaba: using namespace std;
1c60f8bc27 2011-12-28        kinaba: typedef long long LL;
1c60f8bc27 2011-12-28        kinaba: typedef complex<double> CMP;
1c60f8bc27 2011-12-28        kinaba: 
1c60f8bc27 2011-12-28        kinaba: class SumOfLuckiness { public:
1c60f8bc27 2011-12-28        kinaba: 	long long theSum(int A, int B)
1c60f8bc27 2011-12-28        kinaba: 	{
1c60f8bc27 2011-12-28        kinaba: 		return theSum(B) - theSum(A-1);
1c60f8bc27 2011-12-28        kinaba: 	}
1c60f8bc27 2011-12-28        kinaba: 
1c60f8bc27 2011-12-28        kinaba: 	LL theSum(LL X)
1c60f8bc27 2011-12-28        kinaba: 	{
1c60f8bc27 2011-12-28        kinaba: 		string S; {stringstream ss; ss<<X; ss>>S;}
1c60f8bc27 2011-12-28        kinaba: 		memo.clear();
1c60f8bc27 2011-12-28        kinaba: 		return rec(S, 0, 0);
1c60f8bc27 2011-12-28        kinaba: 	}
1c60f8bc27 2011-12-28        kinaba: 
1c60f8bc27 2011-12-28        kinaba: 	LL rec(const string& S, int i, int dif)
1c60f8bc27 2011-12-28        kinaba: 	{
1c60f8bc27 2011-12-28        kinaba: 		if( i == S.size() )
1c60f8bc27 2011-12-28        kinaba: 			return abs(dif);
1c60f8bc27 2011-12-28        kinaba: 
1c60f8bc27 2011-12-28        kinaba: 		LL total = rec(S, i+1, dif+(S[i]=='4')-(S[i]=='7'));
1c60f8bc27 2011-12-28        kinaba: 		for(char c='0'; c<S[i]; ++c)
1c60f8bc27 2011-12-28        kinaba: 			total += count_all(S.size() - (i+1), dif+(c=='4')-(c=='7'));
1c60f8bc27 2011-12-28        kinaba: 		return total;
1c60f8bc27 2011-12-28        kinaba: 	}
1c60f8bc27 2011-12-28        kinaba: 
1c60f8bc27 2011-12-28        kinaba: 	map<pair<int,int>, LL> memo;
1c60f8bc27 2011-12-28        kinaba: 	LL count_all(int n, int dif)
1c60f8bc27 2011-12-28        kinaba: 	{
1c60f8bc27 2011-12-28        kinaba: 		if( n == 0 )
1c60f8bc27 2011-12-28        kinaba: 			return abs(dif);
1c60f8bc27 2011-12-28        kinaba: 
1c60f8bc27 2011-12-28        kinaba: 		const pair<int,int> key(n, dif);
1c60f8bc27 2011-12-28        kinaba: 		if( memo.count(key) )
1c60f8bc27 2011-12-28        kinaba: 			return memo[key];
1c60f8bc27 2011-12-28        kinaba: 
1c60f8bc27 2011-12-28        kinaba: 		LL total = 0;
1c60f8bc27 2011-12-28        kinaba: 		for(char c='0'; c<='9'; ++c)
1c60f8bc27 2011-12-28        kinaba: 			total += count_all(n-1, dif+(c=='4')-(c=='7'));
1c60f8bc27 2011-12-28        kinaba: 		return memo[key] = total;
1c60f8bc27 2011-12-28        kinaba: 	}
1c60f8bc27 2011-12-28        kinaba: };
1c60f8bc27 2011-12-28        kinaba: 
1c60f8bc27 2011-12-28        kinaba: // BEGIN CUT HERE
1c60f8bc27 2011-12-28        kinaba: #include <ctime>
1c60f8bc27 2011-12-28        kinaba: double start_time; string timer()
1c60f8bc27 2011-12-28        kinaba:  { ostringstream os; os << " (" << int((clock()-start_time)/CLOCKS_PER_SEC*1000) << " msec)"; return os.str(); }
1c60f8bc27 2011-12-28        kinaba: template<typename T> ostream& operator<<(ostream& os, const vector<T>& v)
1c60f8bc27 2011-12-28        kinaba:  { os << "{ ";
1c60f8bc27 2011-12-28        kinaba:    for(typename vector<T>::const_iterator it=v.begin(); it!=v.end(); ++it)
1c60f8bc27 2011-12-28        kinaba:    os << '\"' << *it << '\"' << (it+1==v.end() ? "" : ", "); os << " }"; return os; }
1c60f8bc27 2011-12-28        kinaba: void verify_case(const long long& Expected, const long long& Received) {
1c60f8bc27 2011-12-28        kinaba:  bool ok = (Expected == Received);
1c60f8bc27 2011-12-28        kinaba:  if(ok) cerr << "PASSED" << timer() << endl;  else { cerr << "FAILED" << timer() << endl;
1c60f8bc27 2011-12-28        kinaba:  cerr << "\to: \"" << Expected << '\"' << endl << "\tx: \"" << Received << '\"' << endl; } }
1c60f8bc27 2011-12-28        kinaba: #define CASE(N) {cerr << "Test Case #" << N << "..." << flush; start_time=clock();
1c60f8bc27 2011-12-28        kinaba: #define END	 verify_case(_, SumOfLuckiness().theSum(A, B));}
1c60f8bc27 2011-12-28        kinaba: int main(){
1c60f8bc27 2011-12-28        kinaba: 
1c60f8bc27 2011-12-28        kinaba: CASE(0)
1c60f8bc27 2011-12-28        kinaba: 	int A = 1;
1c60f8bc27 2011-12-28        kinaba: 	int B = 10;
1c60f8bc27 2011-12-28        kinaba: 	long long _ = 2LL;
1c60f8bc27 2011-12-28        kinaba: END
1c60f8bc27 2011-12-28        kinaba: CASE(1)
1c60f8bc27 2011-12-28        kinaba: 	int A = 40;
1c60f8bc27 2011-12-28        kinaba: 	int B = 47;
1c60f8bc27 2011-12-28        kinaba: 	long long _ = 8LL;
1c60f8bc27 2011-12-28        kinaba: END
1c60f8bc27 2011-12-28        kinaba: CASE(2)
1c60f8bc27 2011-12-28        kinaba: 	int A = 58;
1c60f8bc27 2011-12-28        kinaba: 	int B = 526;
1c60f8bc27 2011-12-28        kinaba: 	long long _ = 231LL;
1c60f8bc27 2011-12-28        kinaba: END
1c60f8bc27 2011-12-28        kinaba: CASE(3)
1c60f8bc27 2011-12-28        kinaba: 	int A = 4444;
1c60f8bc27 2011-12-28        kinaba: 	int B = 7777;
1c60f8bc27 2011-12-28        kinaba: 	long long _ = 2338LL;
1c60f8bc27 2011-12-28        kinaba: END
1c60f8bc27 2011-12-28        kinaba: CASE(4)
1c60f8bc27 2011-12-28        kinaba: 	int A = 585858585;
1c60f8bc27 2011-12-28        kinaba: 	int B = 858585858;
1c60f8bc27 2011-12-28        kinaba: 	long long _ = 287481025LL;
1c60f8bc27 2011-12-28        kinaba: END
1c60f8bc27 2011-12-28        kinaba: CASE(5)
1c60f8bc27 2011-12-28        kinaba: 	int A = 1;
1c60f8bc27 2011-12-28        kinaba: 	int B = 1;
1c60f8bc27 2011-12-28        kinaba: 	long long _ = 0LL;
1c60f8bc27 2011-12-28        kinaba: END
1c60f8bc27 2011-12-28        kinaba: CASE(6)
1c60f8bc27 2011-12-28        kinaba: 	int A = 1;
1c60f8bc27 2011-12-28        kinaba: 	int B = 2000000000;
1c60f8bc27 2011-12-28        kinaba: 	long long _ = -1LL;
1c60f8bc27 2011-12-28        kinaba: END
1c60f8bc27 2011-12-28        kinaba: 
1c60f8bc27 2011-12-28        kinaba: }
1c60f8bc27 2011-12-28        kinaba: // END CUT HERE