Money Buys Happiness

7
1 10
1 5
2 80
0 10
200 100
3 100
70 100
100 200
150 150
5 8
3 1
5 3
3 4
1 5
5 3
2 5
1 5
2 1
5 3
2 5
2 4
4 1
5 1
3 4
5 2
2 1
1 2
3 5
3 2
3 2