static float rainDayProbability ( int a [ ] , int n ) {
  float count = 0 , m ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    if ( a [ i ] == 1 ) count ++ ;
  }
  m = count / n ;
  return m ;
}

static float rainDayProbability ( int a [ ] , int n ) { float count = 0 , m ; for ( int i = 0 ; i < n ; i ++ ) { if ( a [ i ] == 1 ) count ++ ; } m = count / n ; return m ; }
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