wrap;">The first line of input contains the two integers N and T. The following N lines each contain the initial position and speed of a single cow.  Position is a nonnegative integer and speed is a positive integer; both numbers are at most 1 billion.  All cows start at  distinct positions, and these will be given in increasing order in the input.<br />
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<p></p></div></div></div></div></div><div class="row"><div class="column"><h4 class="ui top attached block header">输出格式</h4><div cl