【小米oj】 dreamstart 的催促

 1 #define mm(a) memset(a,0,sizeof(a));
 2 #define max(x,y) (x)>(y)?(x):(y)
 3 #define min(x,y) (x)<(y)?(x):(y)
 4 #define Fopen freopen("1.in","r",stdin); freopen("m.out","w",stdout);
 5 #define rep(i,a,b) for(int i=(a);i<=(b);i++)
 6 #define per(i,b,a) for(int i=(b);i>=(a);i--)
 7 #include<bits/stdc++.h>
 8 typedef long long ll;
 9 #define PII pair<ll,ll>
10 using namespace std;
11 const int INF=0x3f3f3f3f;
12 const int MAXN=(int)2e5 + 5;
13 const ll mod=10000019;
14 
15 ll qpow(ll x,ll y,ll mod) {
16     ll ans=1;
17     while(y) {
18         if(y&1)ans=(x*ans)%mod;
19         x=(x*x)%mod;
20         y>>=1;
21     }
22     return ans;
23 }
24 int phi(int n) {
25     int rea = n;
26     for(int i=2; i*i<=n; i++) {
27         if(n % i == 0) {
28             rea = rea - rea / i;
29             while(n % i == 0) n /= i;
30         }
31     }
32     if(n > 1)
33         rea = rea - rea / n;
34     return rea;
35 }
36 
37 ll gao(ll x,ll i) {
38     ll p=phi(mod);
39     return qpow(x,qpow(i,i,p),mod);
40 }
41 
42 int main() {
43     int n;
44     scanf("%d",&n);
45     ll ans=0;
46     for(int i=1; i<=n; i++) {
47         ll x;
48         scanf("%lld",&x);
49         ans+=gao(x,(ll)i);
50         ans%=mod;
51     }
52     printf("%lld
",ans);
53     return 0;
54 }