mirror of
https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
97 lines
2.2 KiB
C++
97 lines
2.2 KiB
C++
#include<iostream>
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#include<cstdio>
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#include<algorithm>
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using namespace std;
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#define maxn 1000000
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#define MOD 258280327
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#define LL long long
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int notprime[maxn+10];
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int prime[maxn+10],tot;
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int mu[maxn+10]={0,1};
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LL jie[maxn+10];
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LL inv[maxn+10];
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LL power(LL x,LL k){
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LL res=1,t=x;
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while(k){
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if(k&1)res=res*t%MOD;
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t=t*t%MOD;
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k>>=1;
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}
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return res%MOD;
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}
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void init(){
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jie[0]=jie[1]=1;
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tot=0;
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mu[1]=1;
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inv[0]=inv[1]=1;
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for(int i=2;i<=maxn;i++){
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jie[i]=i*jie[i-1]%MOD;
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inv[i]=power(jie[i],MOD-2);
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if(!notprime[i]){
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prime[tot++]=i;
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mu[i]=-1;
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}
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for(int j=0;j<tot&&i*prime[j]<=maxn;j++){
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notprime[i*prime[j]]=1;
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if(i%prime[j]==0){
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mu[i*prime[j]]=0;
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break;
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}
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mu[i*prime[j]]=-mu[i];
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}
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}
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}
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int n;
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int ma;
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int cnt[maxn+10];
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LL F1[maxn+10],F2[maxn+10];
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LL ans1,ans2;
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void calc(){
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for(int i=1;i<=ma;i++){
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LL tmp=0;
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for(int j=1;j<=cnt[i];j++){
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LL a=jie[cnt[i]];
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LL b=inv[cnt[i]-j];
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tmp=(tmp+a*b%MOD*jie[n-j+1]%MOD)%MOD;
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}
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F1[i]=tmp;
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if(cnt[i]>0)
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F2[i]=cnt[i]*power(2,cnt[i]-1);
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else F2[i]=0;
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}
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LL tmp1,tmp2;
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ans1=ans2=0;
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for(int i=1;i<=ma;i++){
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tmp1=tmp2=0;
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for(int j=i;j<=ma;j+=i){
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tmp1=(tmp1+mu[j/i]*F1[j]%MOD)%MOD;
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tmp2=(tmp2+mu[j/i]*F2[j]%MOD)%MOD;
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}
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ans1=(ans1+i*tmp1%MOD)%MOD;
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ans2=(ans2+i*tmp2%MOD)%MOD;
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}
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}
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int main(){
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init();
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while(~scanf("%d",&n)){
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for(int i=1;i<=maxn;i++)cnt[i]=0;
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ma=0;
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for(int i=0;i<n;i++){
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int x;scanf("%d",&x);
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if(ma<x)ma=x;
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for(int j=1;j*j<=x;j++){
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if(j*j==x)cnt[j]++;
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else if(x%j==0){
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cnt[j]++;
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cnt[x/j]++;
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}
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}
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}
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calc();
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if(ans1==ans2)printf("Equal %lld\n",ans1);
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else if(ans1>ans2)printf("Mr. Zstu %lld\n",ans1);
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else printf("Mr. Hdu %lld\n",ans2);
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}
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return 0;
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}
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