Created
October 5, 2014 14:02
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9528 潜伏
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#include<cstdio> | |
#include<cstring> | |
bool pr[110]; | |
void init() | |
{ | |
int i,j; | |
memset(pr,true,sizeof(pr)); | |
pr[0]=pr[1]=false; | |
for(i=1;i<100;i++)if(pr[i]) | |
{ | |
for(j=2;i*j<=100;j++) | |
pr[i*j]=false; | |
} | |
} | |
int n; | |
int a[100010]; | |
char s[100010]; | |
void init2() | |
{ | |
int i,pp; | |
int len=strlen(s); | |
a[len+1]=a[len]=-1; | |
pp=0; | |
for(i=len-1;i>=0;i--) | |
{ | |
pp=pp/10+(s[i]-'0')*10; | |
if(pp>10&&pr[pp]) | |
a[i]=pp; | |
else | |
a[i]=a[i+1]; | |
} | |
} | |
int main() | |
{ | |
// freopen("6.in","r",stdin); | |
// freopen("6.out","w",stdout); | |
int i,j; | |
init(); | |
scanf("%s%d",s,&n); | |
init2(); | |
for(i=0;i<n;i++) | |
{ | |
scanf("%d",&j); | |
printf("%d\n",a[j-1]); | |
} | |
return 0; | |
} |
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