[ { "grade": 1, "merge": 1 }, { "grade": 2, "merge": 2 }, { "grade": 3, "merge": 4 }, { "grade": 4, "merge": 8 }, { "grade": 5, "merge": 16 }, { "grade": 6, "merge": 32 }, { "grade": 7, "merge": 64 }, { "grade": 8, "merge": 128 }, { "grade": 9, "merge": 256 }, { "grade": 10, "merge": 512 }, { "grade": 11, "merge": 1024 }, { "grade": 12, "merge": 2048 }, { "grade": 13, "merge": 4096 }, { "grade": 14, "merge": 8192 }, { "grade": 15, "merge": 16384 }, { "grade": 16, "merge": 32768 }, { "grade": 17, "merge": 65536 }, { "grade": 18, "merge": 131072 }, { "grade": 19, "merge": 262144 }, { "grade": 20, "merge": 524288 }, { "grade": 21, "merge": 1048576 }, { "grade": 22, "merge": 2097152 }, { "grade": 23, "merge": 4194304 }, { "grade": 24, "merge": 8388608 }, { "grade": 25, "merge": 16777216 }, { "grade": 26, "merge": 33554432 }, { "grade": 27, "merge": 67108864 }, { "grade": 28, "merge": 134217728 }, { "grade": 29, "merge": 268435456 }, { "grade": 30, "merge": 536870912 } ]