#include<stdio.h>
#define mod 1000000007
typedef long long lld;
int n, m, mx, ba[200000];
lld fac[300000], soin[200000], real[200000], dap;
lld exp(lld x, lld y){
if(y==0)return 1;
lld im=exp(x,y/2);
im=(im*im)%mod;
if(y%2)im=(im*x)%mod;
return im;
}
lld comb(lld a, lld b){
lld im=fac[a-b]*fac[b]%mod;
return fac[a]*exp(im,mod-2)%mod;
}
int main(){
int i, j, a;
scanf("%d%d", &n, &m);
fac[0]=1;
for(i=1; i<300000; i++)fac[i]=fac[i-1]*i%mod;
for(i=0; i<m; i++){
scanf("%d", &a);
if(mx<a)mx=a;
ba[a]=1;
}
for(i=1; i<=mx; i++){
if(ba[i])continue;
for(a=i*2; a<=mx; a+=i){
if(ba[a])break;
}
if(a<=mx)ba[i]=1;
}
soin[1]=1;
for(i=2; i<=mx; i++){
for(a=2; a*a<=i; a++){
if(i%a==0)break;
}
if(a*a>i)soin[i]=-1;
else if(i%(a*a)==0)soin[i]=0;
else soin[i]=soin[i/a]*soin[a];
}
for(i=1; i<=mx; i++){
if(!ba[i])continue;
for(a=1; a*a<=i; a++){
if(i%a==0){
real[i/a]+=soin[a];
if(a*a<i)real[a]+=soin[i/a];
}
}
}
for(i=1; i<=mx; i++){
dap+=real[i]*comb(i+n-2, n-1);
dap=(dap+mod)%mod;
}
printf("%lld", dap);
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
60 ms |
7336 KB |
Output is correct |
| 2 |
Correct |
60 ms |
7336 KB |
Output is correct |
| 3 |
Correct |
60 ms |
7336 KB |
Output is correct |
| 4 |
Correct |
64 ms |
7336 KB |
Output is correct |
| 5 |
Correct |
64 ms |
7336 KB |
Output is correct |
| 6 |
Correct |
56 ms |
7336 KB |
Output is correct |
| 7 |
Correct |
64 ms |
7336 KB |
Output is correct |
| 8 |
Correct |
64 ms |
7336 KB |
Output is correct |
| 9 |
Correct |
64 ms |
7336 KB |
Output is correct |
| 10 |
Correct |
60 ms |
7336 KB |
Output is correct |
| 11 |
Correct |
64 ms |
7336 KB |
Output is correct |
| 12 |
Correct |
68 ms |
7336 KB |
Output is correct |
| 13 |
Correct |
64 ms |
7336 KB |
Output is correct |
| 14 |
Correct |
68 ms |
7336 KB |
Output is correct |
| 15 |
Correct |
68 ms |
7336 KB |
Output is correct |
| 16 |
Correct |
68 ms |
7336 KB |
Output is correct |
| 17 |
Correct |
60 ms |
7336 KB |
Output is correct |
| 18 |
Correct |
60 ms |
7336 KB |
Output is correct |
| 19 |
Correct |
68 ms |
7336 KB |
Output is correct |
| 20 |
Correct |
68 ms |
7336 KB |
Output is correct |
| 21 |
Correct |
68 ms |
7336 KB |
Output is correct |
| 22 |
Correct |
76 ms |
7336 KB |
Output is correct |
| 23 |
Correct |
60 ms |
7336 KB |
Output is correct |
| 24 |
Correct |
80 ms |
7336 KB |
Output is correct |
| 25 |
Correct |
60 ms |
7336 KB |
Output is correct |
| 26 |
Correct |
100 ms |
7336 KB |
Output is correct |
| 27 |
Correct |
68 ms |
7336 KB |
Output is correct |
| 28 |
Correct |
100 ms |
7336 KB |
Output is correct |
| 29 |
Correct |
88 ms |
7336 KB |
Output is correct |
| 30 |
Correct |
68 ms |
7336 KB |
Output is correct |
| 31 |
Correct |
220 ms |
7336 KB |
Output is correct |
| 32 |
Correct |
192 ms |
7336 KB |
Output is correct |
| 33 |
Correct |
192 ms |
7336 KB |
Output is correct |
| 34 |
Correct |
168 ms |
7336 KB |
Output is correct |
| 35 |
Correct |
168 ms |
7336 KB |
Output is correct |
| 36 |
Correct |
192 ms |
7336 KB |
Output is correct |
| 37 |
Correct |
196 ms |
7336 KB |
Output is correct |
| 38 |
Correct |
168 ms |
7336 KB |
Output is correct |
| 39 |
Correct |
172 ms |
7336 KB |
Output is correct |
| 40 |
Correct |
156 ms |
7336 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
60 ms |
7336 KB |
Output is correct |
| 2 |
Correct |
60 ms |
7336 KB |
Output is correct |
| 3 |
Correct |
60 ms |
7336 KB |
Output is correct |
| 4 |
Correct |
64 ms |
7336 KB |
Output is correct |
| 5 |
Correct |
64 ms |
7336 KB |
Output is correct |
| 6 |
Correct |
60 ms |
7336 KB |
Output is correct |
| 7 |
Correct |
64 ms |
7336 KB |
Output is correct |
| 8 |
Correct |
60 ms |
7336 KB |
Output is correct |
| 9 |
Correct |
60 ms |
7336 KB |
Output is correct |
| 10 |
Correct |
60 ms |
7336 KB |
Output is correct |
| 11 |
Correct |
64 ms |
7336 KB |
Output is correct |
| 12 |
Correct |
64 ms |
7336 KB |
Output is correct |
| 13 |
Correct |
64 ms |
7336 KB |
Output is correct |
| 14 |
Correct |
68 ms |
7336 KB |
Output is correct |
| 15 |
Correct |
68 ms |
7336 KB |
Output is correct |
| 16 |
Correct |
64 ms |
7336 KB |
Output is correct |
| 17 |
Correct |
68 ms |
7336 KB |
Output is correct |
| 18 |
Correct |
64 ms |
7336 KB |
Output is correct |
| 19 |
Correct |
64 ms |
7336 KB |
Output is correct |
| 20 |
Correct |
64 ms |
7336 KB |
Output is correct |
| 21 |
Correct |
68 ms |
7336 KB |
Output is correct |
| 22 |
Correct |
80 ms |
7336 KB |
Output is correct |
| 23 |
Correct |
68 ms |
7336 KB |
Output is correct |
| 24 |
Correct |
92 ms |
7336 KB |
Output is correct |
| 25 |
Correct |
64 ms |
7336 KB |
Output is correct |
| 26 |
Correct |
104 ms |
7336 KB |
Output is correct |
| 27 |
Correct |
68 ms |
7336 KB |
Output is correct |
| 28 |
Correct |
96 ms |
7336 KB |
Output is correct |
| 29 |
Correct |
84 ms |
7336 KB |
Output is correct |
| 30 |
Correct |
68 ms |
7336 KB |
Output is correct |
| 31 |
Correct |
208 ms |
7336 KB |
Output is correct |
| 32 |
Correct |
180 ms |
7336 KB |
Output is correct |
| 33 |
Correct |
188 ms |
7336 KB |
Output is correct |
| 34 |
Correct |
168 ms |
7336 KB |
Output is correct |
| 35 |
Correct |
180 ms |
7336 KB |
Output is correct |
| 36 |
Correct |
192 ms |
7336 KB |
Output is correct |
| 37 |
Correct |
196 ms |
7336 KB |
Output is correct |
| 38 |
Correct |
172 ms |
7336 KB |
Output is correct |
| 39 |
Correct |
176 ms |
7336 KB |
Output is correct |
| 40 |
Correct |
164 ms |
7336 KB |
Output is correct |
