FAULT - testgen

#include<cstdio>
#include<vector>
#include<set>
#include<map>
#include<queue>
#include<algorithm>
#include<string>
#include<utility>
#include<ctime>
#include<iostream>
#include<cstring>
#include<cassert>
#include<cmath>
using namespace std;

#define REP(i,a,b) for(i=a;i<b;i++)
#define rep(i,n) REP(i,0,n)

#define ll long long
#define RAND (rand()/(RAND_MAX+1.0))

ll nor_rand(ll a, ll b){
  ll k = (b-a+1) * RAND;
  return k + a;
}

ll exp_rand(ll a, ll b){
  ll k = exp(log(b-a+1) * RAND);
  k += a;
  if(k<a)k=a; if(k>b)k=b;
  return k;
}

ll fg_rand(ll a, ll b, int fg){
  if(fg==0) return nor_rand(a,b);
  if(fg==1) return exp_rand(a,b);
  assert(0);
  return -1;
}

void gen(const char file[]){
  int N, S; double P;
  int i, j, k;
  FILE *fp = fopen(file, "w");

  N = nor_rand(50, 200);
  S = nor_rand(2*N, 1000);
  P = 0.3 + RAND * 0.5;

  fprintf(fp, "%d %d\n", N, S);
  rep(i,S){
    vector<int> c;
    rep(j,N) if(RAND < P) c.push_back(j);
    random_shuffle(c.begin(), c.end());
    fprintf(fp, "%d",c.size());
    rep(j,c.size()) fprintf(fp, " %d",c[j]);
    fprintf(fp, "\n");
  }

  fclose(fp);
}

int main(){
  srand(time(NULL));

  int i; char file[1000];

  rep(i,40){
    sprintf(file, "%d.in", i);
    gen(file);
  }

  rep(i,40) printf("#%d ",i); puts("");

  return 0;
}