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Re:大佬求助(洛谷P1593)已过,POJ wa掉In Reply To:大佬求助(洛谷P1593)已过,POJ wa掉 Posted by:13258849083 at 2019-07-25 08:06:26 > #include <cstdio> > #include <cstring> > #include <iostream> > #include <algorithm> > using namespace std; > typedef long long ll; > const ll mod=9901; > const ll maxn=100010; > > ll cnt; > ll ans=1,prime[maxn],prime_cnt[maxn]; > > ll qpow(ll q,ll n) > { > ll ans=1; > while(n) > { > if(n&1){ ans=ans*q%mod; } > n>>=1; q=q*q%mod; > } > return ans; > } > ll exgcd(ll a,ll b,ll &x,ll &y) > { > if(a==0&&b==0) return -1ll; > if(b==0){ x=1ll,y=0ll; return a; } > ll d=exgcd(b,a%b,y,x); > y-=a/b*x; return d; > } > ll inverse(ll a,ll p) > { > if(a%p==0) return 1ll; > else if((a+1)%p==0) return -2ll; > ll x,y,d=exgcd(a,p,x,y); > if(d==1) return (x%p+p)%p; > return -1ll; > } > /* > ll inverse(ll x,ll p) { return qpow(x, mod - 2); } > */ > int main() > { > ll a,b; cin>>a>>b; > if(a==0) { cout<<0<<endl; return 0; } > if(b==0||a==1) { cout<<1<<endl; return 0; } > for(ll i=2;i*i<=a;i++) > { > if(a%i==0) > { > prime[++cnt]=i%mod; > while(a%i==0){ a/=i; prime_cnt[cnt]++; } > } > } > if(a!=1){ prime[++cnt]=a; prime_cnt[cnt]=1; } > for(ll i=1;i<=cnt;i++) > { > if(prime[i]%mod==1){ ans=ans*(prime_cnt[i]+1)%mod; } > else > { > ll div=(prime[i]-1+mod)%mod; > ans=ans*(qpow(prime[i],prime_cnt[i]*b+1)%mod-1+mod)%mod*inverse(div,mod)%mod; > } > } > cout<<ans<<endl; return 0; > } Followed by: Post your reply here: |
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