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Unsigned int range =0 to 65535

Then your question is if you insert int i =-1; then what value i will printed.

See if you give the value outside the  unsigned range .Then it will give result inside the range only .

See how -1 will be represented in 16 bit architecture Simply take 2 s complement

0000 0000 0000 0001

1111 1111 1111 1110

1111 1111 1111 1111

which is 65535 largest unsigned number

similarly for value

unsigned  int i=-2                 output i=65534

unsigned int i=65536           output i=0

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