// IN THE NAME OF GOD
#include<bits/stdc++.h>
#define endl '\n'
#define file_reading freopen("input.txt", "r", stdin); freopen("output.txt", "w", stdout);
#define flush cout.flush();
using namespace std;
typedef long long ll;
typedef long double dll;
typedef unsigned long long ull;
const int N = 4e3+5;
int dat[N][N], mark[N][N], ans, having, must;
vector<pair<int,int>> gone, later;
int n,m;
void dfs(int x, int y){
mark[x][y] = 1;
having++;
if (x > 1 && dat[x][y] == dat[x-1][y] && !mark[x-1][y]) dfs(x-1,y);
if (x < n && dat[x][y] == dat[x+1][y] && !mark[x+1][y]) dfs(x+1,y);
if (y > 1 && dat[x][y] == dat[x][y-1] && !mark[x][y-1]) dfs(x,y-1);
if (y < m && dat[x][y] == dat[x][y+1] && !mark[x][y+1]) dfs(x,y+1);
if (x > 1 && dat[x][y] != dat[x-1][y] && !mark[x-1][y] && dat[x][y] + dat[x-1][y] == 3) later.push_back({x-1,y});
if (x < n && dat[x][y] != dat[x+1][y] && !mark[x+1][y] && dat[x][y] + dat[x+1][y] == 3) later.push_back({x+1,y});
if (y > 1 && dat[x][y] != dat[x][y-1] && !mark[x][y-1] && dat[x][y] + dat[x][y-1] == 3) later.push_back({x,y-1});
if (y < m && dat[x][y] != dat[x][y+1] && !mark[x][y+1] && dat[x][y] + dat[x][y+1] == 3) later.push_back({x,y+1});
}
void solve(){
cin >> n >> m;
for(int i=1; i<=n; i++){
for(int j=1; j<=m; j++){
char g; cin >> g;
if (g == '.') dat[i][j] = 0;
else if (g == 'R') dat[i][j] = 1, must++;
else dat[i][j] = 2, must++;
}
}
if (must == 0){cout << 0 << endl; return;}
ans = 1;
dfs(n,m);
while(having != must){
ans++;
gone.clear();
for(pair<int,int> cur : later) gone.push_back(cur);
later.clear();
for(pair<int,int> cur : gone) if (!mark[cur.first][cur.second]) dfs(cur.first,cur.second);
}
cout << ans << endl;
}
int32_t main(){
ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
int t; t=1; //cin >> t;
while(t--){solve();}
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
20 ms |
6580 KB |
Output is correct |
| 2 |
Correct |
1 ms |
468 KB |
Output is correct |
| 3 |
Correct |
1 ms |
724 KB |
Output is correct |
| 4 |
Correct |
10 ms |
6612 KB |
Output is correct |
| 5 |
Correct |
4 ms |
3284 KB |
Output is correct |
| 6 |
Correct |
0 ms |
468 KB |
Output is correct |
| 7 |
Correct |
1 ms |
724 KB |
Output is correct |
| 8 |
Correct |
1 ms |
852 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1108 KB |
Output is correct |
| 10 |
Correct |
4 ms |
2772 KB |
Output is correct |
| 11 |
Correct |
4 ms |
2772 KB |
Output is correct |
| 12 |
Correct |
9 ms |
3540 KB |
Output is correct |
| 13 |
Correct |
4 ms |
3284 KB |
Output is correct |
| 14 |
Correct |
4 ms |
3284 KB |
Output is correct |
| 15 |
Correct |
21 ms |
6304 KB |
Output is correct |
| 16 |
Correct |
25 ms |
6488 KB |
Output is correct |
| 17 |
Correct |
14 ms |
6108 KB |
Output is correct |
| 18 |
Correct |
13 ms |
6612 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
16 ms |
31612 KB |
Output is correct |
| 2 |
Correct |
80 ms |
20000 KB |
Output is correct |
| 3 |
Correct |
415 ms |
105240 KB |
Output is correct |
| 4 |
Correct |
114 ms |
44168 KB |
Output is correct |
| 5 |
Correct |
247 ms |
80104 KB |
Output is correct |
| 6 |
Correct |
872 ms |
183100 KB |
Output is correct |
| 7 |
Correct |
19 ms |
32980 KB |
Output is correct |
| 8 |
Correct |
18 ms |
31656 KB |
Output is correct |
| 9 |
Correct |
3 ms |
1236 KB |
Output is correct |
| 10 |
Correct |
1 ms |
724 KB |
Output is correct |
| 11 |
Correct |
20 ms |
32340 KB |
Output is correct |
| 12 |
Correct |
2 ms |
1620 KB |
Output is correct |
| 13 |
Correct |
70 ms |
19924 KB |
Output is correct |
| 14 |
Correct |
39 ms |
13260 KB |
Output is correct |
| 15 |
Correct |
36 ms |
16216 KB |
Output is correct |
| 16 |
Correct |
32 ms |
7812 KB |
Output is correct |
| 17 |
Correct |
169 ms |
41300 KB |
Output is correct |
| 18 |
Correct |
167 ms |
47820 KB |
Output is correct |
| 19 |
Correct |
130 ms |
44104 KB |
Output is correct |
| 20 |
Correct |
107 ms |
35996 KB |
Output is correct |
| 21 |
Correct |
270 ms |
80340 KB |
Output is correct |
| 22 |
Correct |
269 ms |
80120 KB |
Output is correct |
| 23 |
Correct |
371 ms |
66076 KB |
Output is correct |
| 24 |
Correct |
252 ms |
77040 KB |
Output is correct |
| 25 |
Correct |
601 ms |
126188 KB |
Output is correct |
| 26 |
Correct |
1169 ms |
877164 KB |
Output is correct |
| 27 |
Correct |
814 ms |
322560 KB |
Output is correct |
| 28 |
Correct |
832 ms |
182948 KB |
Output is correct |
| 29 |
Correct |
833 ms |
177456 KB |
Output is correct |
| 30 |
Correct |
837 ms |
223036 KB |
Output is correct |
| 31 |
Correct |
815 ms |
102956 KB |
Output is correct |
| 32 |
Correct |
881 ms |
389056 KB |
Output is correct |
