#include <bits/stdc++.h>
#define N 200005
using namespace std;
int n,m;
int ans = 1e9;
bool ck(vector<vector<int>> v){
bool ok = 1;
for(int i=0;i<n;i++){
for(int j=1;j<m;j++){
if(v[i][j] != v[i][j-1])ok = 0;
}
}
if(ok)return 1;
ok = 1;
for(int i=1;i<n;i++){
for(int j=0;j<m;j++){
if(v[i][j] != v[i-1][j])ok = 0;
}
}
return ok;
}
int calc(vector<int> v,vector<int> v2){
int ret = 1e9;
for(int x=0;x<m;x++){
if(v == v2)ret = min(ret, m-x);
int tmp = v[0];
for(int i=0;i<m-1;i++){
v[i] = v[i+1];
}
v[m-1] = tmp;
}
return ret;
}
void go(int a,vector<vector<int>> v,int cost){
if(a == m){
if(ck(v)){
ans = min(ans, cost);
}
for(int x=0;x<m;x++){
int costt = cost + min(x, m-x);
for(int i=1;i<n;i++){
costt += calc(v[i],v[0]);
}
ans = min(ans, costt);
int tmp = v[0][0];
for(int i=0;i<m-1;i++){
v[0][i] = v[0][i+1];
}
v[0][m-1] = tmp;
}
return;
}
for(int i=0;i<n;i++){
go(a+1,v,cost+min(i,n-i));
int tmp = v[0][a];
for(int i=0;i<n-1;i++){
v[i][a] = v[i+1][a];
}
v[n-1][a] = tmp;
}
}
void solve(){
cin >> n >> m;
vector<vector<int>> v;
for(int i=0;i<n;i++){
v.push_back({});
for(int j=0;j<m;j++){
int x;
cin >> x;
v[i].push_back(x);
}
}
go(0,v,0);
cout << min(ans,100500);
}
int32_t main(){
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
#ifdef Local
freopen("in.txt","r",stdin);
freopen("out.txt","w",stdout);
#endif
int t=1;
//cin>>t;
while(t--){
solve();
}
#ifdef Local
cout<<endl<<fixed<<setprecision(2)<<1000.0 * clock() / CLOCKS_PER_SEC<< " milliseconds ";
#endif
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
204 KB |
Output is correct |
| 2 |
Correct |
1 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 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
| 6 |
Halted |
0 ms |
0 KB |
- |
