1. First there will be 16 pairs who play each other. There will be 16 winners coming out of this first round.

2. Then there will be 8 pairs who play each other. There will be 8 winners coming out of this first round.

3. Then there will be 4 pairs who play each other. There will be 4 winners coming out of this first round.

4. Then there will be 2 pairs who play each other. There will be 2 winners coming out of this first round.

5. Then there will be 1 pair who play each other. There will be 1 winner coming out of this first round.

6. The number of games = 16+8+4+2+1 = 31