Google Code Jam 2015, round 0.

puzzles/google_code_jam/2015/0-A.cpp

@@ -0,0 +1,103 @@
+/*
+VIM: let g:lcppflags="-std=c++11 -O2 -pthread"
+VIM: let g:wcppflags="/O2 /EHsc /DWIN32"
+*/
+
+#include <assert.h>
+#include <iostream>
+#include <sstream>
+#include <fstream>
+#include <iomanip>
+#include <exception>
+#include <stdexcept>
+#include <map>
+#include <set>
+#include <list>
+#include <vector>
+#include <string>
+#include <memory>
+#include <functional>
+#include <algorithm>
+#include <utility>
+#include <limits> 
+#include <math.h>
+
+typedef long long ll;
+typedef std::vector<ll> vec;
+void check(bool b) { if (!b) std::cerr << "error" << std::endl; }
+#define FOR(i,l) for ( ll i =0, ie = ll(l); i<ie; ++i )
+
+/*
+Read n values into v
+*/
+template <class V>
+void readv(V& v, int n)
+{
+	v.reserve(n);
+	for (int i = 0; i < n; ++i)
+	{
+		typename V::value_type e;
+		std::cin >> e;
+		check(!std::cin.fail());
+		v.push_back(e);
+	}
+}
+
+/*
+Problem
+*/
+
+int solve_puzzle()
+{
+	ll smax;
+	std::string s;
+	std::cin >> smax >> s;
+
+	assert( s.size() == smax+1 );
+
+	int c = 0;
+	int z = 0;
+	for (int i = 0; i < (int)s.size(); ++i)
+	{
+		if (z < i)
+		{
+			c += i - z;
+			z = i;
+		}
+
+		z += s[i]-'0';
+	}
+
+	return c;
+}
+
+int main(void)
+{
+	try{
+		srand((unsigned)time(NULL));
+		int puzzle_count;
+
+		std::cin >> puzzle_count;
+		std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
+		for (int i = 1; i <= puzzle_count; i++)
+		{
+			std::cout << "Case #" << i << ": ";
+			auto r = solve_puzzle();
+			std::cout << r << std::endl;
+		}
+
+		return 0;
+	}
+	catch (const std::exception& e)
+	{
+		std::cerr << std::endl
+			<< "std::exception(\"" << e.what() << "\")." << std::endl;
+		return 2;
+	}
+	catch (...)
+	{
+		std::cerr << std::endl
+			<< "unknown exception." << std::endl;
+		return 1;
+	}
+}