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  1. #include <iostream>
  2. #include <string>
  3. #include <vector>
  4. #include <algorithm>
  5. using namespace std;
  6.  
  7. int time(int r, int m, const char *bridge) {
  8.     int i = 0, res = 1;
  9.     while (i + r <= m) {
  10.         res++;
  11.         i += r;
  12.         while (bridge[i] == '1') i--;
  13.     }
  14.     return res;
  15. }
  16.  
  17. int main() {
  18.     ios::sync_with_stdio(false); cin.tie(0);
  19.     int n, m; cin >> n >> m;
  20.     vector<int> a(n);
  21.     for (auto &x: a) cin >> x;
  22.     string bridge; cin >> bridge;
  23.     bridge = '0' + bridge + '0';
  24.     vector<int> cache(101, 0);
  25.     for (auto &x: a) {
  26.         if (!cache[x]) x = cache[x] = time(x, m, bridge.data());
  27.         else x = cache[x];
  28.     }
  29.     sort(a.begin(), a.end());
  30.     if (n == 1) cout << a[0];
  31.     else if (n == 2) cout << a[1];
  32.     else {
  33.         int f0 = a[0], f1 = a[1];
  34.         for (int i=2; i<n; i++) {
  35.             int f2 = min(f0 + a[0] + 2*a[1] + a[i], f1 + a[0] + a[i]);
  36.             f0 = f1, f1 = f2;
  37.         }
  38.         cout << f1;
  39.     }
  40.     return 0;
  41. }
  42.  
Time limit exceeded #stdin #stdout 5s 15408KB
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https://ideone.com/4AWy8t
language:
C++14 (clang 8.0)
created:
6 years ago
visibility:
secret

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