Training 3: FFT and Polynomial
Problem A
Solved by Xiejiadong.
Problem from BZOJ4827.
[题解]
Problem B
Unsolved.
Problem C
Unsolved.
Problem D
Unsolved.
Problem E
Unsolved.
Problem F
Solved by Xiejiadong.
Problem from HDU1402.
超大数 $a\times b$ 。
看作多项式乘法，FFT模版题。
注意 $0\times a$ 的情况。
Problem G
Unsolved.
Problem H
Unsolved.