Training 3: FFT and Polynomial
Problem A
Solved by Xiejiadong.
Problem from BZOJ4827.
FFT
[题解]
Problem B
Solved by Xiejiadong.
Problem from CF622F.
拉格朗日插值法。
[题解]
Problem C
Solved by Xiejiadong.
Problem form Codeforces1096G.
NTT。
[题解]
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
Solved by Xiejiadong.
Problem from HDU4609.
FFT。
Problem H
Unsolved.