Event Dates

在历史课上，老师问 Vasya $n$ 个著名事件发生的日期，而 Vasya 不记得具体日期，只知道第 $i$ 个事件所在的时间在 $l_i$ 到 $r_i$ 之间，且一天最多发生一件。请你帮助 Vasya 找出每个事件发生的日期，数据保证有解。 输入 $n$（$1 \leq n \leq 100$），表示著名事件的个数，接下来 $n$ 行，每行是 $l_i$ 和 $r_i$，表示第 $i$ 个事件最早可能发生的日期与最晚可能发生的日期。 输出 $n$ 个数，每个数为每一个事件可能发生的日期，如果存在多种符合要求的解，输出任意一种即可。 感谢 @陆麟瑞666 提供的翻译

On a history lesson the teacher asked Vasya to name the dates when $ n $ famous events took place. He doesn't remembers the exact dates but he remembers a segment of days $ [l_{i},r_{i}] $ (inclusive) on which the event could have taken place. However Vasya also remembers that there was at most one event in one day. Help him choose such $ n $ dates of famous events that will fulfill both conditions. It is guaranteed that it is possible.

The first line contains one integer $ n $ ( $ 1<=n<=100 $ ) — the number of known events. Then follow $ n $ lines containing two integers $ l_{i} $ and $ r_{i} $ each ( $ 1<=l_{i}<=r_{i}<=10^{7} $ ) — the earliest acceptable date and the latest acceptable date of the $ i $ -th event.

Print $ n $ numbers — the dates on which the events took place. If there are several solutions, print any of them. It is guaranteed that a solution exists.

3
1 2
2 3
3 4

1 2 3 

2
1 3
1 3

1 2