bzoj 2631: tree — LCT
2631: tree Time Limit: 30 Sec Memory Limit: 128 MB Description 一棵n个点的树,每个点的初始权值为1。对于这棵树有q个操作,每个操作为以下四种操作之一: + u v c:将u...
2631: tree Time Limit: 30 Sec Memory Limit: 128 MB Description 一棵n个点的树,每个点的初始权值为1。对于这棵树有q个操作,每个操作为以下四种操作之一: + u v c:将u...
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2179: FFT快速傅立叶 Time Limit: 10 Sec Memory Limit: 259 MB Description 给出两个n位10进制整数x和y,你需要计算x*y。 Input ...
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