View Compilation Error

0_0_1315563_3210.cpp: In function `int main()':
0_0_1315563_3210.cpp:51: error: no match for 'operator%' in '(&max)->__gnu_cxx::__normal_iterator<_Iterator, _Container>::operator* [with _Iterator = Ball*, _Container = std::vector<Ball, std::allocator<Ball> >]() % 2'
0_0_1315563_3210.cpp:51: error: expected `)' at end of input
0_0_1315563_3210.cpp:51: error: expected `)' at end of input
0_0_1315563_3210.cpp:51: error: expected primary-expression at end of input
0_0_1315563_3210.cpp:51: error: expected `;' at end of input
0_0_1315563_3210.cpp:51: error: expected `}' at end of input
0_0_1315563_3210.cpp:51: error: expected `}' at end of input