Submission #216317

#	Time	Username	Problem	Language	Result	Execution time	Memory
216317		model_code	Stray Cat (JOI20_stray)	C++17	100 / 100	98 ms	16380 KiB

Anthony

#include "Anthony.h"
#include <queue>
#include <utility>
#include <vector>

namespace {

using std::vector;

}  // namespace

std::vector<int> Mark(int N, int M, int A, int B,
                      std::vector<int> U, std::vector<int> V) {
  vector<vector<int>> G(N);
  for (int i = 0; i < M; ++i) {
    G[U[i]].push_back(i);
    G[V[i]].push_back(i);
  }
  std::queue<int> que;
  vector<int> dist(N, N);
  vector<int> colors(N, -1);
  dist[0] = 0;
  que.push(0);
  for (; !que.empty(); ) {
    const int u = que.front();
    que.pop();
    for (const int i : G[u]) {
      const int v = U[i] ^ V[i] ^ u;
      if (dist[v] > dist[u] + 1) {
        dist[v] = dist[u] + 1;
        que.push(v);
        if (A == 2) {
          if (u == 0) {
            colors[v] = 0;
          } else if (G[u].size() >= 3) {
            colors[v] = ("010011"[colors[u]] == '0') ? 1 : 0;
          } else {
            colors[v] = (colors[u] + 1) % 6;
          }
        }
      }
    }
  }
  vector<int> x(M, -1);
  for (int i = 0; i < M; ++i) {
    int u = U[i], v = V[i];
    if (dist[u] > dist[v]) {
      std::swap(u, v);
    }
    if (A == 2) {
      x[i] = "010011"[colors[v]] - '0';
    } else {
      x[i] = dist[u] % 3;
    }
  }
  return x;
}

Catherine

#include "Catherine.h"
#include <assert.h>
#include <algorithm>
#include <string>
#include <vector>

namespace {

using std::string;

int A, B;
int last = -1;
bool known = false;
string seq = "";

}  // namespace

void Init(int A, int B) {
  ::A = A;
  ::B = B;
}

int Move(std::vector<int> y) {
  int ans = -2;
  auto yy = y;
  if (last != -1) {
    ++yy[last];
  }
  if (A == 2) {
    int deg = 0;
    for (int k = 0; k < 2; ++k) {
      deg += yy[k];
    }
    if (deg == 2) {
      if (known) {
        assert(std::count(y.begin(), y.end(), 1) == 1);
        ans = std::find(y.begin(), y.end(), 1) - y.begin();
      } else {
        for (int k = 0; k < 2; ++k) {
          seq += string(y[k], static_cast<char>('0' + k));
        }
        if (seq.size() == 5) {
          bool rev = false;
          for (int rot = 0; rot < 6; ++rot) {
            if (seq == string("010011010011").substr(rot, 5)) {
              rev = true;
            }
          }
          known = true;
          if (rev) {
            ans = -1;
          } else {
            assert(std::count(y.begin(), y.end(), 1) == 1);
            ans = std::find(y.begin(), y.end(), 1) - y.begin();
          }
        } else {
          ans = seq.back() - '0';
        }
      }
    } else {
      known = true;
      assert(std::count(yy.begin(), yy.end(), 1) == 1);
      ans = std::find(yy.begin(), yy.end(), 1) - yy.begin();
      if (ans == last) {
        ans = -1;
      }
    }
  } else {
    int flag = 0;
    for (int k = 0; k < 3; ++k) {
      if (yy[k] > 0) {
        flag |= 1 << k;
      }
    }
    switch (flag) {
      case 0b001: case 0b011: ans = 0; break;
      case 0b010: case 0b110: ans = 1; break;
      case 0b100: case 0b101: ans = 2; break;
      default: assert(false);
    }
  }
  if (ans != -1) {
    last = ans;
  }
  return ans;
}

• Subtask 1: 2 / 2
• Subtask 2: 2 / 2
• Subtask 3: 2 / 2
• Subtask 4: 9 / 9
• Subtask 5: 5 / 5
• Subtask 6: 71 / 71
• Subtask 7: 9 / 9