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#include <bits/stdc++.h>
#pragma GCC optimize(3)
using namespace std;
#define N 501
int di[8]={0, 1, 1, 1, 0, -1, -1, -1}, dj[8]={-1, -1, 0, 1, 1, 1, 0, -1};
int n, m, k;
string g[N];
bool vis[N][N];
unsigned long long h[2*N*N+1], a1, a2, a3, pB=1, c[8*N*N], cnt;
int main() {
cin.sync_with_stdio(0);
cin.tie(0);
cin >> n >> m >> k, k=min(n*m, k);
for(int i=0; i<k; ++i)
pB*=29;
for(int i=0; i<n; ++i)
cin >> g[i];
for(int d=0; d<8; ++d) {
for(int i=0; i<n; ++i) {
for(int j=0; j<m; ++j) {
if(vis[i][j])
continue;
int a=0, ci=i, cj=j;
while(!vis[ci][cj]) {
vis[ci][cj]=1;
h[++a]=g[ci][cj]-'a'+1;
ci=(ci+di[d]+n)%n;
cj=(cj+dj[d]+m)%m;
}
for(int l=a; l+1<a+k; l+=a)
memcpy(h+l+1, h+1, 8*a);
for(int l=1; l<a+k; ++l)
h[l]+=h[l-1]*29;
for(int l=0; l<a; ++l)
c[cnt++]=h[l+k]-h[l]*pB;
}
}
memset(vis, 0, sizeof(vis));
}
sort(c, c+8*n*m);
for(int i=0, j=0; i<8*n*m; i=j) {
while (j<8*n*m&&c[j]==c[i])
j++;
a1+=(unsigned long long)(j-i)*(j-i);
}
a2=n*m*8, a2*=a2;
int a3 = gcd(a1,a2);
cout << a1/a3 << "/" << a2/a3;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
2648 KB |
Output is correct |
| 2 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 3 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 4 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 5 |
Correct |
2 ms |
2652 KB |
Output is correct |
| 6 |
Correct |
11 ms |
4956 KB |
Output is correct |
| 7 |
Correct |
154 ms |
9204 KB |
Output is correct |
| 8 |
Correct |
2153 ms |
19892 KB |
Output is correct |
