Interviews are considered puzzles.

puzzles/interviews/tomtom/tomtom_demo.cpp

@@ -0,0 +1,52 @@
+/*
+VIM: let g:lcppflags="-std=c++11 -O2 -pthread"
+VIM: let g:wcppflags="/O2 /EHsc /DWIN32"
+VIM: let g:argv=""
+*/
+#include <iostream>
+#include <stdexcept>
+#include <vector>
+#include <algorithm>
+#include <string>
+
+int solution( std::vector<int> & a ) 
+{
+	long long s = 0;
+	for ( auto it = a.begin(), ie=a.end(); it != ie; ++it ) {
+		s += *it;
+	}
+
+	long long t = 0;
+	for ( auto it = a.begin(), ie=a.end(); it != ie; ++it ) {
+		if ( (s-*it)%2 == 0 && t == (s-*it)/2 )
+			return it - a.begin();
+		t += *it;
+	}
+	return -1;
+}
+
+int main ( void )
+{try{
+#if 1
+	std::vector<int> a = {
+		-1,3,-4,5,1,-6,2,1
+	};
+
+	std::cout << solution( a ) << std::endl;
+	
+#endif
+	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;
+}}
+