#include <iostream>
#include <algorithm>
#include <vector>
#include <cassert>
 
int main() {
	std::vector<std::vector<int>> vs = { 
	    {5, 3, 1, 2},
	    {10, 1},
	    {3, 2, 1},
	    {4, 3, 2, 0}
	};
 
	std::for_each(vs.begin(), vs.end(), [](auto& v) {std::sort(v.begin(), v.end());});
 
	assert((vs[0]==std::vector<int>{1,2,3,5}));
	assert((vs[1]==std::vector<int>{1,10}));
	assert((vs[2]==std::vector<int>{1,2,3}));
	assert((vs[3]==std::vector<int>{0,2,3,4}));
	std::cout << "Success.\n";	
}

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