#include <iostream>
#include <fstream>
#include <vector>
#include <cstring>
#include <algorithm>
#include <set>
#include <map>
#include <queue>
#include <list>
#include <utility>
#include <cmath>
#include <numeric>
using namespace std;
typedef long long ll;
#define F first
#define S second
#define pb push_back
#define endl "\n"
#define all(x) x.begin(), x.end()
const int M = 200007;
const ll inf = 1e18;
const ll mod = 1e9 + 7;
const double pi = acos(-1);
const int dx[] = {1, 0, -1, 0}, dy[] = {0, 1, 0, -1};
map <int,int> cnt[65][65];
ll n, m, ans;
int main()
{
ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
cin >> n >> m;
for(int i = 1; i <= n; ++i){
string s;
cin >> s;
int mask = 0, tmp[65];
memset(tmp, -1, sizeof tmp);
for(int j = 0; j < m; ++j) if(s[j] != '?') mask |= (1 << j);
for(int mask2 = 0; mask2 < (1 << m); ++mask2){
if((mask & mask2) != mask2) continue;
int cur = 0;
for(int j = 0, p = 1; j < m; ++j, p *= 26) if((mask2 >> j) & 1) cur += p * (s[j] - 'a');
tmp[mask2] = cur;
}
for(int mask2 = 0; mask2 < (1 << m); ++mask2){
int res = (mask & mask2);
ans += cnt[mask2][res][tmp[res]];
}
for(int mask2 = 0; mask2 < (1 << m); ++mask2) if(tmp[mask2] != -1) ++cnt[mask][mask2][tmp[mask2]];
}
cout << ans << endl;
return 0;
}
// Don't forget special cases. (n = 1?)
// Look for the constraints. (Runtime array? overflow?)
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
6 ms |
588 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
8 ms |
588 KB |
Output is correct |
2 |
Correct |
7 ms |
588 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
9 ms |
652 KB |
Output is correct |
2 |
Correct |
14 ms |
588 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
27 ms |
1260 KB |
Output is correct |
2 |
Correct |
14 ms |
864 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
30 ms |
1092 KB |
Output is correct |
2 |
Correct |
32 ms |
2028 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
175 ms |
7568 KB |
Output is correct |
2 |
Correct |
18 ms |
1292 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
348 ms |
18008 KB |
Output is correct |
2 |
Correct |
23 ms |
1984 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
686 ms |
33576 KB |
Output is correct |
2 |
Correct |
262 ms |
15548 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1254 ms |
60344 KB |
Output is correct |
2 |
Correct |
41 ms |
3712 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
1145 ms |
65540 KB |
Execution killed with signal 9 |
2 |
Halted |
0 ms |
0 KB |
- |