#include <iostream>
#include <vector>
void getArray (std::vector<std::vector<int>>& ary, int n) {
ary.resize (n);
for (int i = 0; i < n; i++) {
ary [i].resize (i+1);
}
}
int main() {
std::vector<std::vector<int>> ary;
getArray (ary, 42);
return 0;
}
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