快速幂(模板)

    xiaoxiao2025-10-07  3

    //x ^m次方,快速幂 long long get_inv(LL x,LL m) { LL r,y; for(r = 1,y = m; y; x = x * x % mod,y >>= 1) { if(y % 2 == 1) r = r * x % mod; } return r; }
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