HDU5478 Can you find it 數學快速冪

Given a prime number C(1≤C≤2×105)C(1≤C≤2×105), and three integers k1, b1, k2 (1≤k1,k2,b1≤109)(1≤k1,k2,b1≤109). Please find all pairs (a, b) which satisfied the equation ak1⋅n+b1ak1⋅n+b1 + bk2⋅n−k2+1bk

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