2655_gen.cpp

#include <cstdio>
#include <chrono>
#include <random>
using namespace std;

mt19937 R;
bool Svs[1010], Wvs[1010];

int r(int x, int y){ return R() % (y - x + 1) + x; }

int main(){
  R.seed(chrono::system_clock::now().time_since_epoch().count());

  int N = 100; printf("%d\n", N);
  for(; N--; ){
    int s = r(1, 1000), w = r(1, 1000);
    while(Svs[s] || Wvs[w]){ s = r(1, 1000); w = r(1, 1000); }

    printf("%d %d %d\n", s, r(1, 1000), w);
    Svs[s] = Wvs[w] = true;
  }
  return 0;
}