BZOJ 5443 [Ceoi2018]Lottery-白红宇

BZOJ 5443 [Ceoi2018]Lottery

阅读量：268 次

发布时间：2019-03-01

本文共 1453 字，大约阅读时间需要 4 分钟。

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#include 
   
    #include 
    
     #include 
     
      #include 
      
       #include 
       #include 
        
         using namespace std;struct Query { int k, j; int ans_id; Query(int k_val, int j_val) : k(k_val), j(j_val) {}};int main() { // ???? vector
         
           L = {0, 0, 0, 0}; vector
          
            Q = {0, 0}; int n, q; // ????????? // ... // ?????????? map

> substr_dict; for (int i = 0; i <= n; ++i) { for (int j = 0; j <= n - i; ++j) { string s = s[n - i + j ...]; // ????????? int mask = 0; for (int k = 0; k < i; ++k) { if (s[k] != s[k + i]) { mask |= (1 << k); } } substr_dict[mask]++; } } // ?????? for (int q_id = 0; q_id < q; ++q_id) { Query query = Q[q_id]; // ???????????? int count = 0; for (auto& pair : substr_dict) { for (auto& other : substr_dict[pair.first]) { if (pair.second > other) continue; int diff = pair.first ^ other; if (__builtin_popcount(diff) == query.k) { count++; } } } // ???? result[q_id] = count; } // ???? for (int i = 0; i < q; ++i) { cout << result[i] << endl; } return 0;}