Update main.cpp

Coin Time 1 minute
Coin Rewards: 
Premine 
Block1: 50M
POW
Block 2-100000 : 500000
Block100000-200000: 250000
Block 200001-300000:125000
Block 300001-400000:62500
Block 400001-500000:32250
Block 500001 - x : 10000