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what does the following part of the code do;
int coef = (MOD - mul(B, modPow(A, MOD - 2))) % MOD;
pw[0] = 1;
for (int i = 1; i <= T; i++) pw[i] = mul(pw[i - 1], coef);
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Polynomial Division
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what does the following part of the code do; int coef = (MOD - mul(B, modPow(A, MOD - 2))) % MOD; pw[0] = 1; for (int i = 1; i <= T; i++) pw[i] = mul(pw[i - 1], coef);