// How many people does it take to have two of them
   // with matchingbirthdays...

void setup() {
   int N = 100;
   int count = 0;
   boolean[] birthday = new boolean[365];
   
   // Do N trials
   for (int trial = 1; trial <= N; trial++) {
   // Do one trial
   int peopleCount = 0;
   boolean found = false;

 // initialize birthday[]
   for (int i=0; i < birthday.length; i++) {
   birthday[i] = false;
   }

 while (!found) {
   peopleCount = peopleCount + 1;  // a person enters
   int day = int(random(365));    // their birthday
   // record birthday
   if (birthday[day]) {
   found = true;
   } else {
   birthday[day] = true;
   }
   }
   println(peopleCount);
   count = count + peopleCount;
   }
   // Output result
   println(float(count)/N);
   } // setup();