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*/
#include "bits/stdc++.h"
#define ll long long
#define ld long double
#define ff first
#define ss second
#define pii pair<int, int>
#define mp make_pair
using namespace std;
void setIO(string s = ""){
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
cout.tie(nullptr);
if (!s.empty()){
freopen((s+".in").c_str(), "r", stdin);
freopen((s+".out").c_str(), "w", stdout);
}
}
struct chash {
const double PI = acos(-1);
const uint64_t C = (2e18 * PI)+71;
const uint32_t random = chrono::steady_clock::now().time_since_epoch().count();
size_t operator()(ll x) const {
return __builtin_bswap64((x^random)*C);
}
};
const ll M[2] = {1000000009, 1000000007};
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
vector<string> s;
map<pair<ll, ll>, int> cnt;
vector<ll> p[2];
array<ll, 2> B;
void init(){
p[0].push_back(B[0]);
p[1].push_back(B[1]);
for (int i = 1; i <= 32; i++) {
p[0].push_back(p[0].back()*p[0].back()%M[0]);
p[1].push_back(p[1].back()*p[1].back()%M[1]);
}
}
ll hsh[2][31][500][500];
ll concat(ll pre, ll suf, int factor, const int &sign){
ll ret = pre*p[sign][factor]%M[sign];
return (ret+suf)%M[sign];
}
void generate(const int &k, const int &dx, const int &dy, const int &n, const int &m){
memset(hsh, 0, sizeof hsh);
for (int i = 0; i < n; i++) for (int j = 0; j < m; j++) hsh[0][0][i][j] = hsh[1][0][i][j] = s[i][j];
for (int l = 1; l <= 30; l++){
for (int i = 0; i < n; i++){
for (int j = 0; j < m; j++){
hsh[0][l][i][j] = concat(hsh[0][l-1][i][j], hsh[0][l-1][((i+dx*(1<<(l-1)))%n+n)%n][((j+dy*(1<<(l-1)))%m+m)%m], l-1, 0);
hsh[1][l][i][j] = concat(hsh[1][l-1][i][j], hsh[1][l-1][((i+dx*(1<<(l-1)))%n+n)%n][((j+dy*(1<<(l-1)))%m+m)%m], l-1, 1);
}
}
}
for (int i = 0; i < n; i++){
for (int j = 0; j < m; j++){
ll cur[2] = {0, 0};
int cur_x = i, cur_y = j;
for (int b = 0; b <= 30; b++){
if (k & (1<<b)){
cur[0] = concat(cur[0], hsh[0][b][cur_x][cur_y], b, 0);
cur[1] = concat(cur[1], hsh[1][b][cur_x][cur_y], b, 1);
cur_x = ((cur_x + dx*(1<<b))%n + n)%n ;
cur_y = ((cur_y + dy*(1<<b))%m+m)%m;
}
}
cnt[mp(cur[0], cur[1])]++;
}
}
}
int main(){
setIO();
int n, m, k;
cin >> n >> m >> k;
ll same = 0, all = 1LL*n*m*8*n*m*8;
for (int i = 0; i < n; i++){
string ss;
cin >> ss;
s.push_back(ss);
}
B[0] = uniform_int_distribution<int>(0, M[0]-1)(rng);
B[1] = uniform_int_distribution<int>(0, M[0]-1)(rng);
init();
for (int i = -1; i <= 1; i++){
for (int j = -1; j <= 1; j++){
if (i != 0 || j != 0) generate(k, i, j, n, m);
}
}
for (const auto &x : cnt) same += 1LL*x.ss*x.ss;
ll g = __gcd(same, all);
same/=g;
all/=g;
cout << same << '/' << all;
}
Compilation message
osmosmjerka.cpp: In function 'void setIO(std::string)':
osmosmjerka.cpp:138:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
138 | freopen((s+".in").c_str(), "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
osmosmjerka.cpp:139:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
139 | freopen((s+".out").c_str(), "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
84 ms |
121620 KB |
Output is correct |
| 2 |
Correct |
84 ms |
121764 KB |
Output is correct |
| 3 |
Correct |
94 ms |
121680 KB |
Output is correct |
| 4 |
Correct |
88 ms |
121724 KB |
Output is correct |
| 5 |
Correct |
104 ms |
121928 KB |
Output is correct |
| 6 |
Correct |
148 ms |
124496 KB |
Output is correct |
| 7 |
Correct |
591 ms |
140616 KB |
Output is correct |
| 8 |
Correct |
1732 ms |
154660 KB |
Output is correct |
