B. BerSU Ball
time limit per test
1 second
memory limit per test
256 megabytes
input
standard input
output
standard output
The Berland State University is hosting a ballroom dance in celebration of its 100500-th anniversary!
n boys and m girls are already busy rehearsing waltz, minuet, polonaise and quadrille moves.
We know that several boy&girl pairs are going to be invited to the ball. However, the partners' dancing skill in each pair must differ by at most one.
For each b......
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