Submission #220390

#	Time	Username	Problem	Language	Result	Execution time	Memory
220390		WLZ	Stray Cat (JOI20_stray)	C++14	100 / 100	80 ms	17472 KiB

Anthony

#include "Anthony.h"
#include <bits/stdc++.h>
using namespace std;

namespace {
  const vector<int> period = {0, 1, 0, 0, 1, 1};

  struct edge {
    int from, to, idx;
  };
  vector< vector<edge> > g;

  vector<int> solve1234(int N, int M, vector<int> U, vector<int> V) {
    queue<int> q;
    q.push(0);
    vector<int> dist(N, -1), ans(M, -1);
    dist[0] = 0;
    while (!q.empty()) {
      int u = q.front(); q.pop();
      for (auto& e : g[u]) {
        if (dist[e.to] == -1) {
          dist[e.to] = dist[u] + 1;
          q.push(e.to);
        }
      }
    }
    for (int i = 0; i < M; i++) {
      ans[i] = min(dist[U[i]], dist[V[i]]) % 3;
    }
    return ans;
  }

  vector<int> solve567(int N, int M, vector<int> U, vector<int> V) {
    vector<int> prev(N, 1), was(N, 0), len(N, 0), ans(M, -1);
    queue<int> q; q.push(0);
    was[0] = 1;
    while (!q.empty()) {
      int u = q.front(); q.pop();
      if ((int) g[u].size() == 2) {
        if (len[u] == 0) {
          if (prev[u] == 0) {
            len[u] = 1;
          }
        }
      }
      for (auto& e : g[u]) {
        if (!was[e.to]) {
          if ((int) g[u].size() == 2 || u == 0) {
            len[e.to] = len[u] + 1;
            ans[e.idx] = period[len[u] % 6];
          } else {
            ans[e.idx] = !prev[u];
          }
          q.push(e.to);
          was[e.to] = 1;
          prev[e.to] = ans[e.idx];
        }
      }
    }
    return ans;
  }
}

vector<int> Mark(int N, int M, int A, int B, vector<int> U, vector<int> V) {
  g.resize(N);
  for (int i = 0; i < M; i++) {
    g[U[i]].push_back({U[i], V[i], i});
    g[V[i]].push_back({V[i], U[i], i});
  }
  if (A >= 3) {
    return solve1234(N, M, U, V);
  } else {
    return solve567(N, M, U, V);
  }
}

Catherine

#include "Catherine.h"
#include <bits/stdc++.h>
using namespace std;

namespace {
  const vector<int> period = {0, 1, 0, 0, 1, 1};
  vector<int> cur;

  int A, B, start = 1, rev = 0, last;
}

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

int Move(vector<int> y) {
  if (A >= 3) {
    for (int i = 0; i < 3; i++) {
      if (y[i] > 0 && y[(i + 1) % 3] > 0) {
        return i;
      }
    }
    for (int i = 0; i < 3; i++) {
      if (y[i] > 0) {
        return i;
      }
    }
  } else {
    if (rev) {
      int tmp = cur.back();
      cur.pop_back();
      if (cur.empty()) {
        rev = 0;
      }
      return (last = tmp);
    }
    if (y[0] > 1 && y[1] > 0) {
      start = 0;
      return (last = 1);
    }
    if (y[0] > 1 && y[1] > 0) {
      start = 0;
      return (last = 0);
    }
    if (y[0] == 0 && y[1] == 0) {
      start = 0;
      return (last = -1);
    }
    if (start) {
      if (y[0] > 0 && y[1] > 0 && !cur.empty()) {
        start = 0;
        return (last = !cur.back());
      }
      if (cur.empty()) {
        if (y[0] == 1 && y[1] == 0) {
          start = 0;
          return 0;
        }
        if (y[1] == 1 && y[0] == 0) {
          start = 0;
          return 1;
        }
      }
      for (int i = 0; i < 2; i++) {
        if (y[i] > 0) {
          if (cur.empty()) {
            if (y[i] > 1) {
              cur.push_back(i);
            } else {
              cur.push_back(!i);
            }
          } else if (y[i] > 1) {
            start = 0;
            return -1;
          }
          cur.push_back(i);
          break;
        }
      }
      if ((int) cur.size() == 5) {
        start = 0;
        for (int i = 0; i < 6; i++) {
          int match = 1;
          for (int j = 0; j < 5; j++) {
            if (period[(i + j) % 6] != cur[j]) {
              match = 0;
              break;
            }
          }
          if (match) {
            rev = 1;
            cur.pop_back();
            cur.pop_back();
            return -1;
          }
        }
      }
      if (!rev) {
        return (last = cur.back());
      }
    } else {
      if (y[0] == 1 && y[1] == 1) {
        last = !last;
        return last;
      }
      if (y[0] > 0) {
        return (last = 0);
      }
      return (last = 1);
    }
  }
}

Compilation message (stderr)

Catherine.cpp: In function 'int Move(std::vector<int>)':
Catherine.cpp:112:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

• 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