easy start at 1
medium
hard
extreme
impossible
1

1+1

2

1

3+4

7

1

21+12

33

1

213+123

336

1

1252+7617

8869

2

2+2

4

2

2+3

5

2

33+33

66

2

456+512

968

2

2024+2024

4048

3

5+5

10

3

4+5

9

3

121+21

142

3

349+412

761

3

4527+8272

12799

4

1+2

3

4

6+7

13

4

145+31

176

4

832+455

1287

4

10272+10299

20571

5

10+10

20

5

12+5

17

5

50+19

69

5

123+999

1122

5

100000000000000000000000000000000000000000000000000000000000000000000000000000000000+77777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777

OverFlow

M
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