0x3f3f3f3f = 1061109567
0x7f7f7f7f = 2139062143
0x7fffffff = 2147483647
0xffffffff = 4294967295
0x1fffffff = 536870911
0x1f1f1f1f = 522133279
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0x3f3f3f3f = 1061109567
0x7f7f7f7f = 2139062143
0x7fffffff = 2147483647
0xffffffff = 4294967295
0x1fffffff = 536870911
0x1f1f1f1f = 522133279