Submission #762683

#	Time	Username	Problem	Language	Result	Execution time	Memory
762683		vjudge1	Virus Experiment (JOI19_virus)	C++17	0 / 100	43 ms	6436 KiB

virus

#include <bits/stdc++.h>

using namespace std;

#ifdef LOCAL
#include "C:\GCC\debug.h"
#else
#define debug(...) void(42)
#endif

const int inf = 123456780;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  
  int n, r, c;
  cin >> n >> r >> c;
  vector<vector<int>> g(r, vector<int> (c));

  string s;
  cin >> s;
  string t;
  t += s;
  t += s;
  swap(s, t);
  n *= 2;

  vector<pair<char, int>> buckets;
  for (int i = 0; i < n; i++) {
    if (!buckets.empty() && buckets.back().first == s[i]) {
      buckets.back().second += 1;
    } else {
      buckets.push_back({s[i], +1});
    }
  }

  map<char, int> maxSubarray;
  for (int i = 0; i < (int) buckets.size(); i++) {
    maxSubarray[buckets[i].first] = max(maxSubarray[buckets[i].first], buckets[i].second);
  }

  if (maxSubarray['E'] == 2 * n) {
    maxSubarray['E'] = inf;
  }
  if (maxSubarray['W'] == 2 * n) {
    maxSubarray['W'] = inf;
  }

  for (int i = 0; i < r; i++) {
    for (int j = 0; j < c; j++) {
      cin >> g[i][j];
    }
  }

  /* 
     min and how many times it appears
  */
  vector<int> row;

  auto Compute = [&](int x) {
    // suppose that x is infected, expand
    int low = x - 1;
    int high = x + 1;

    while (low >= 0 || high < c) {
      if (low >= 0 && maxSubarray['E'] >= row[low]) {
        --low;
        continue;
      }
      if (high < c && maxSubarray['W'] >= row[high]) {
        ++high;
        continue;
      }

      break;
    }
    int pts = high - low;
    pts--;
    return pts;
  };

  int cnt = 0;
  int best = inf;

  for (int i = 0; i < r; i++) {
    for (int j = 0; j < c; j++) {
      if (g[i][j] == 0) {
        row.push_back(inf + 1);
      } else {
        row.push_back(g[i][j]);
      }
    }

    for (int j = 0; j < c; j++) {
      if (g[i][j] == 0) {
        continue;
      }
      int ret = Compute(j);
      if (ret < best) {
        best = ret;
        cnt = 1;
      } else if (ret == best) {
        ++cnt;
      }
    }
    row.clear();
  }

  cout << best << " " << cnt << '\n';
  return 0;
}

• Subtask 1: 0 / 14
• Subtask 2: 0 / 6
• Subtask 3: 0 / 80