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  1. #include <iostream>
  2. #include <bits/stdc++.h>
  3. #define MOD 1000000007
  4. using namespace std;
  5. struct fog{
  6.     long long int x;
  7.     long long int size;
  8. }dp[10];
  9. long long int p[1000000];
  10. long long int power(long long int n){
  11.     if(p[n]!=-1)
  12.         return p[n];
  13.     if(n==1)
  14.         return 10;
  15.     if(n==0)
  16.         return 1;
  17.     if(n%2==0){
  18.         if(n<1000000){
  19.             if(p[n/2]!=-1)
  20.             return p[n]=(p[n/2]*p[n/2])%MOD;
  21.             p[n]=(power(n/2)*power(n/2))%MOD;}
  22.         else
  23.             return (power(n/2)*power(n/2))%MOD;
  24.  
  25.     }
  26.     else{if(n<1000000){
  27.         if(p[(n-1)/2]!=-1)
  28.             return p[n]=(10*((p[(n-1)/2]*p[(n-1)/2])%MOD))%MOD;
  29.             p[n]=(10*((power((n-1)/2)*power((n-1)/2))%MOD))%MOD;
  30.             }
  31.         else{
  32.         return (10*((power((n-1)/2)*power((n-1)/2))%MOD))%MOD;}
  33.     }
  34.     return p[n];
  35.  
  36.  
  37. }
  38. int main()
  39. {   for(int i=0;i<10;++i)
  40.     dp[i].x=i,dp[i].size=1;
  41.     for(int i=0;i<1000000;++i)
  42.         p[i]=-1;
  43.     string s;
  44.     cin >> s;
  45.     int q;
  46.     cin >> q;
  47.  
  48.     string A[q+1];
  49.     for(int i=1;i<=q;++i)
  50.         cin >> A[i];
  51.     for(int i=q;i>0;--i){
  52.         int a=A[i][0]-'0';
  53.         long long int b=0;
  54.         long long int size=0;
  55.         if(A[i].size()<=3){
  56.             dp[a].x=0;
  57.             dp[a].size=0;
  58.         }
  59.         else{long long int c=A[i][3]-'0';
  60.             b=dp[c].x;
  61.             size+=dp[c].size;
  62.             for(int j=4;j<A[i].size();++j){
  63.                 c=A[i][j]-'0';
  64.                 b=(((power(dp[A[i][j]-'0'].size)*b)%MOD)+dp[A[i][j]-'0'].x)%MOD;
  65.                 size+=dp[c].size;
  66.  
  67.             }
  68.             dp[a].x=b;
  69.             dp[a].size=size;
  70.         }
  71.  
  72.  
  73.     }
  74.     long long int ans=0;
  75.     ans=dp[s[0]-'0'].x;
  76.     for(int i=1;i<s.size();++i){
  77.         ans=(((power((dp[s[i]-'0']).size)*ans)%MOD)+dp[s[i]-'0'].x)%MOD;
  78.     }
  79.  
  80.     cout << ans << endl;
  81.     return 0;
  82.  
  83. }
Runtime error #stdin #stdout 0s 10960KB
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Standard input is empty
stdout
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Standard output is empty
https://ideone.com/8m5Bve
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
public

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