reading multiple lines into arrays

[pdk5]

Hello,

I am just starting to solve a problem, with multiple arrays, something like:

2,2
1,2,3,4
6,7,8,9,10
0,2
1,1

+++++
output:
3, 7

first line no of arrays and no of queries. 2nd and 3rd line, array contents. 4th and 5th querirs (i.e 0th array, 2and elem, 1st array, 1st elem)

for that, i what is the good way to read input , ie ,may be use istream_iterator. But follwing startup program fails to compile !

	std::vector<int> vec;

	std::string stringvalues = "125 320 512 750 333";
	std::istringstream iss(stringvalues);

	vec.emplace_back(std::istream_iterator<int>{ iss }, std::istream_iterator<int>{});

Error C2440 'initializing': cannot convert from 'initializer list' to 'int'

But when i try :

	std::string stringvalues = "125 320 512 750 333";
	std::istringstream iss(stringvalues);

	std::vector<int> vec(std::istream_iterator<int>{ iss }, std::istream_iterator<int>{});

works ok !

thanks a lot for comments and inputs

Pdk