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#include <random>
#include <iostream>

void f() {
  std::mt19937 engine;
  
  for (int i = 0; i < 10; ++i) {
    std::cout << engine() << ", ";
  }
}
/* 
output:
1st run: 3499211612, 581869302, 3890346734, 3586334585, 545404204, 4161255391, 3922919429, 949333985, 2715962298, 1323567403, 
2nd run: 3499211612, 581869302, 3890346734, 3586334585, 545404204, 4161255391, 3922919429, 949333985, 2715962298, 1323567403, 
...
nth run: 3499211612, 581869302, 3890346734, 3586334585, 545404204, 4161255391, 3922919429, 949333985, 2715962298, 1323567403, 

*/

#include <random>
#include <iostream>

void f() {
  std::random_device dev;
  std::mt19937 engine(dev());
  
  for (int i = 0; i < 10; ++i) {
    std::cout << engine() << ", ";
  }
}
/*
output:
1st run: 3921124303, 1253168518, 1183339582, 197772533, 83186419, 2599073270, 3238222340, 101548389, 296330365, 3335314032, 
2nd run: 2392369099, 2509898672, 2135685437, 3733236524, 883966369, 2529945396, 764222328, 138530885, 4209173263, 1693483251, 
3rd run: 914243768, 2191798381, 2961426773, 3791073717, 2222867426, 1092675429, 2202201605, 850375565, 3622398137, 422940882,
...

*/