Question 118
João and Maria each have a large pitcher with a liter of water. On the first day, João puts $1\ \mathrm{ml}$ of the water from his pitcher in Maria's jug. On the second day, Maria puts $2\ \mathrm{ml}$ of the water from her pitcher in João's jar. On the third day, João puts $3\ \mathrm{ml}$ of the water in his jug in Maria's jar, and so on. After 200 days, how many milliliters of water are in Maria's jug?