oj.uz

Submission #508759

# Submission time Handle Problem Language Result Execution time Memory
508759 2022-01-13T17:22:14 Z cig32 Dango Maker (JOI18_dango_maker) C++17
33 / 100
 960 ms 262148 KB 
#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
using namespace std;
mt19937_64 rng((int)std::chrono::steady_clock::now().time_since_epoch().count());
const int MAXN = 1e5 + 10;
const int MOD = 1e9 + 7;
//#define int long long    
 
int rnd(int x, int y) { // random number generator
  int u= uniform_int_distribution<int>(x, y)(rng); return u;
}                     
 
unordered_map<int, vector<int> > adj;
vector<int> active;
 
vector<int> v;
unordered_map<int, bool> vis;
 
void dfs(int node) {
    v.push_back(node);
    vis[node] = 1;
    for(int x: adj[node]) {
        if(!vis[x]) dfs(x);
    }
}
void solve(int tc) {
  int n, m;
  cin >> n >> m;
  char a[n+1][m+1];
  for(int i=1; i<=n; i++) {
      for(int j=1; j<=m; j++) {
          cin >> a[i][j];
      }
  }
  for(int i=1; i<=n; i++) {
      for(int j=1; j<=m; j++) {
          if(j+2 <= m && a[i][j] == 'R' && a[i][j+1] == 'G' && a[i][j+2] == 'W') {
              int id = (i-1) * m + j;
              active.push_back(id);
              if(i+2 <= n && a[i+1][j] == 'G' && a[i+2][j] == 'W') {
                  int id2 = n*m + (i-1) * m + j;
                  adj[id].push_back(id2);
                  adj[id2].push_back(id);
              }
              if(i >= 2 && i+1 <= n && a[i-1][j+1] == 'R' && a[i+1][j+1] == 'W') {
                  int id2 = n*m + (i-2) * m + j+1;
                  adj[id].push_back(id2);
                  adj[id2].push_back(id);
              }
              if(i >= 3 && a[i-2][j+2] == 'R' && a[i-1][j+2] == 'G') {
                  int id2 = n*m + (i-3) * m + j+2;
                  adj[id].push_back(id2);
                  adj[id2].push_back(id);
              }
          }
          if(i+2 <= n && a[i][j] == 'R' && a[i+1][j] == 'G' && a[i+2][j] == 'W') {
              int id = n*m + (i-1) * m + j;
              active.push_back(id);
              if(j+2 <= m && a[i][j+1] == 'G' && a[i][j+2] == 'W') {
                  int id2 = (i-1) * m + j;
                  adj[id].push_back(id2);
                  adj[id2].push_back(id);
              }
              if(j >= 2 && j+1 <= m && a[i+1][j-1] == 'R' && a[i+1][j+1] == 'W') {
                  int id2 = i * m + j-1;
                  adj[id].push_back(id2);
                  adj[id2].push_back(id);
              }
              if(j >= 3 && a[i+2][j-2] == 'R' && a[i+2][j-1] == 'G') {
                  int id2 = (i+1) * m + j-2;
                  adj[id].push_back(id2);
                  adj[id2].push_back(id);
              }
          }
      }
  }
  int ans = 0;
  for(int x: active) {
      if(!vis[x]) {
          v.clear();
          dfs(x);
          int mi = 1e9, ma = -1e9;
          int cm;
          for(int y: v) {
              int z = (y > n*m ? y - n*m : y);
              if(y > n*m) z = z + m;
              else z++;
              //z:=index
              int r = (z-1) / m + 1;
              int c = (z-1) % m + 1;
              mi = min(mi, r - c);
              ma = max(ma, r - c);
              cm = r + c;
          }
          //cout << mi << " " << ma << " " << cm << "\n";
          map<int, signed> dp[2];
          int r = (cm + mi) / 2;
          int c = (cm - mi) / 2;
          dp[0][mi] = (c>1 && c<m && a[r][c-1] == 'R' && a[r][c+1] == 'W');
          dp[1][mi] = (r>1 && r<n && a[r-1][c] == 'R' && a[r+1][c] == 'W');
          //cout << "(" << r << ", " << c << ") ";
          for(int i=mi + 2; i<=ma; i+=2) {
              r = (cm + i) / 2;
              c = (cm - i) / 2;
              //cout << "(" << r << ", " << c << ") ";
              dp[0][i] = max(
                dp[0][i-2] + (c >= 2 && c < m && a[r][c-1] == 'R' && a[r][c+1] == 'W'),
                dp[1][i-2]
                );
              dp[1][i] = max(
                dp[0][i-2],
                dp[1][i-2] + (r >= 2 && r < n && a[r-1][c] == 'R' && a[r+1][c] == 'W')
                );
          }
          //cout << "\n";
          ans += max(dp[0][ma], dp[1][ma]);
          /*for(int i=mi; i<=ma; i++) cout << dp[0][i] << " ";
          cout << "\n";
          for(int i=mi; i<=ma; i++) cout << dp[1][i] << " ";
          cout << "\n";*/
      }
  }
  cout << ans << "\n";
  
}
 
int32_t main(){
  ios::sync_with_stdio(0); cin.tie(0);
  int t = 1; //cin >> t;
  for(int i=1; i<=t; i++) solve(i);
} 
/*
10 10
RGWRGWRGWR
WWRGWRGWRG
WRGWRGWRGW
RGWRGWRGWR
GWRGWWGWRG
WRGWRGWRGW
RGWRGWRGWR
GWRGWRGWRG
WRGWRGWRGW
RGWRGWRGWR
 
*/

Compilation message

dango_maker.cpp: In function 'void solve(int)':
dango_maker.cpp:83:15: warning: 'cm' may be used uninitialized in this function [-Wmaybe-uninitialized]
   83 |           int cm;
      |               ^~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 252 KB Output is correct
6 Correct 0 ms 280 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 256 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 0 ms 204 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 252 KB Output is correct
6 Correct 0 ms 280 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 256 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 0 ms 204 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 0 ms 204 KB Output is correct
21 Correct 0 ms 204 KB Output is correct
22 Correct 0 ms 204 KB Output is correct
23 Correct 0 ms 204 KB Output is correct
24 Correct 0 ms 204 KB Output is correct
25 Correct 0 ms 204 KB Output is correct
26 Correct 0 ms 204 KB Output is correct
27 Correct 0 ms 204 KB Output is correct
28 Correct 0 ms 204 KB Output is correct
29 Correct 0 ms 204 KB Output is correct
30 Correct 0 ms 204 KB Output is correct
31 Correct 0 ms 204 KB Output is correct
32 Correct 0 ms 204 KB Output is correct
33 Correct 0 ms 204 KB Output is correct
34 Correct 1 ms 204 KB Output is correct
35 Correct 0 ms 204 KB Output is correct
36 Correct 0 ms 204 KB Output is correct
37 Correct 0 ms 204 KB Output is correct
38 Correct 0 ms 204 KB Output is correct
39 Correct 0 ms 204 KB Output is correct
40 Correct 0 ms 204 KB Output is correct
41 Correct 0 ms 204 KB Output is correct
42 Correct 0 ms 204 KB Output is correct
43 Correct 0 ms 204 KB Output is correct
44 Correct 0 ms 204 KB Output is correct
45 Correct 1 ms 204 KB Output is correct
46 Correct 0 ms 204 KB Output is correct
47 Correct 1 ms 260 KB Output is correct
48 Correct 0 ms 204 KB Output is correct
49 Correct 0 ms 204 KB Output is correct
50 Correct 0 ms 204 KB Output is correct
51 Correct 0 ms 204 KB Output is correct
52 Correct 0 ms 204 KB Output is correct
53 Correct 0 ms 204 KB Output is correct

Subtask #3
0 / 67.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 252 KB Output is correct
6 Correct 0 ms 280 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 256 KB Output is correct
12 Correct 0 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 0 ms 204 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 0 ms 204 KB Output is correct
21 Correct 0 ms 204 KB Output is correct
22 Correct 0 ms 204 KB Output is correct
23 Correct 0 ms 204 KB Output is correct
24 Correct 0 ms 204 KB Output is correct
25 Correct 0 ms 204 KB Output is correct
26 Correct 0 ms 204 KB Output is correct
27 Correct 0 ms 204 KB Output is correct
28 Correct 0 ms 204 KB Output is correct
29 Correct 0 ms 204 KB Output is correct
30 Correct 0 ms 204 KB Output is correct
31 Correct 0 ms 204 KB Output is correct
32 Correct 0 ms 204 KB Output is correct
33 Correct 0 ms 204 KB Output is correct
34 Correct 1 ms 204 KB Output is correct
35 Correct 0 ms 204 KB Output is correct
36 Correct 0 ms 204 KB Output is correct
37 Correct 0 ms 204 KB Output is correct
38 Correct 0 ms 204 KB Output is correct
39 Correct 0 ms 204 KB Output is correct
40 Correct 0 ms 204 KB Output is correct
41 Correct 0 ms 204 KB Output is correct
42 Correct 0 ms 204 KB Output is correct
43 Correct 0 ms 204 KB Output is correct
44 Correct 0 ms 204 KB Output is correct
45 Correct 1 ms 204 KB Output is correct
46 Correct 0 ms 204 KB Output is correct
47 Correct 1 ms 260 KB Output is correct
48 Correct 0 ms 204 KB Output is correct
49 Correct 0 ms 204 KB Output is correct
50 Correct 0 ms 204 KB Output is correct
51 Correct 0 ms 204 KB Output is correct
52 Correct 0 ms 204 KB Output is correct
53 Correct 0 ms 204 KB Output is correct
54 Correct 0 ms 204 KB Output is correct
55 Correct 1 ms 332 KB Output is correct
56 Correct 2 ms 588 KB Output is correct
57 Correct 2 ms 716 KB Output is correct
58 Correct 61 ms 10148 KB Output is correct
59 Correct 799 ms 81964 KB Output is correct
60 Correct 883 ms 82052 KB Output is correct
61 Correct 818 ms 81952 KB Output is correct
62 Correct 1 ms 332 KB Output is correct
63 Correct 777 ms 79756 KB Output is correct
64 Runtime error 960 ms 262148 KB Execution killed with signal 9
65 Halted 0 ms 0 KB -