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  1. // ROOT : DRAGON3012009 : WA in Real Life
  2. #include <bits/stdc++.h>
  3. #define FOR(i,l,r) for(int i = l ; i <= r ; i ++)
  4. #define FORD(i,r,l) for(int i = r ; i >= l ; i --)
  5. #define REP(i, a ) for(int i = 0 ; i < a ; i ++ )
  6. #define compare(v) sort((v).begin(), (v).end()); (v).erase(unique((v).begin(), (v).end()), (v).end());
  7. #define ll long long
  8. #define el "\n"
  9. #define fi first
  10. #define se second
  11. #define _ROOT_ int main()
  12. #define M 1000000007
  13. #define MAXN 1000001
  14. #define INF (1ll<<30)
  15. #define NAME "file"
  16. using namespace std;
  17.  
  18. ll n, m, q ;
  19. ll dp[20][2][2][ (1 << 10) + 1 ][11] ;
  20. string L, R ;
  21.  
  22. ll add(ll a, ll b ) {
  23.     return a + b >= M ? a + b - M : a + b ;
  24. }
  25. ll sub(ll a, ll b ) {
  26.     return a - b < 0 ? a - b + M : a - b ;
  27. }
  28.  
  29. ll DP(ll pos, ll lower, ll start, ll mask, ll sum, ll so_phan_biet, string &x  ) {
  30.     if(pos >= x.size() ) {
  31.         return start && __builtin_popcount(mask ) == so_phan_biet && (sum % so_phan_biet == 0 ) ;
  32.     }
  33.     ll &cur = dp[pos][lower][start][mask][sum] ;
  34.     if(cur != - 1 ) return cur ;
  35.     cur = 0 ;
  36.     ll limit = lower ? x[pos] - '0' : 9 ;
  37.     FOR(i, 0, limit ) {
  38.         ll nxt_start = start || i != 0 ;
  39.         ll nxt_sum = sum ;
  40.         ll nxt_mask = mask ;
  41.         if(nxt_start ) {
  42.             nxt_mask |= (1 << i ) ;
  43.             nxt_sum = ((nxt_sum) * 10 + i ) % so_phan_biet ;
  44.         }
  45.         cur += DP(pos + 1, lower && i == limit, nxt_start, nxt_mask, nxt_sum, so_phan_biet, x ) ;
  46.     }
  47.     return cur ;
  48. }
  49.  
  50. void init() {
  51.     ll x;
  52.     cin >> x >> R ;
  53.     x -- ;
  54.     L = to_string(x) ;
  55.     L = " " + L ;
  56.     R = " " + R ;
  57. }
  58.  
  59. void solve() {
  60.     ll ans = 0 ;
  61.     FOR(gg , 1, 10 ) {
  62.         memset(dp, -1, sizeof dp ) ;
  63.         ll temp = DP(1, 1, 0, 0, 0, gg , R )  ;
  64.         memset(dp, -1, sizeof dp ) ;
  65.         temp = sub(temp,DP(1, 1, 0, 0, 0, gg , L ) ) ;
  66.         ans = add(ans, temp ) ;
  67.     }
  68.     cout << ans << el ;
  69. }
  70.  
  71. _ROOT_ {
  72.     // freopen(NAME".inp" , "r" , stdin);
  73.     // freopen(NAME".out" , "w", stdout) ;
  74.     ios_base::sync_with_stdio(0);
  75.     cin.tie(0);
  76.     cout.tie(0);
  77.     int t = 1; // cin >> t ;
  78.     while(t--) {
  79.         init();
  80.         solve();
  81.     }
  82.     return (0&0);
  83. }
  84.  
Success #stdin #stdout 0.09s 10624KB
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-3124068125037
https://ideone.com/6MImms
language:
C++14 (gcc 8.3)
created:
2 days ago
visibility:
public

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