제출 #1115492

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1115492		Tsagana	Riddick's Cube (IZhO13_riddicks)	C++14	100 / 100	2 ms	460 KiB

riddicks

#include<bits/stdc++.h>

#define IOS ios_base::sync_with_stdio(false);cin.tie();cout.tie();
#define all(x) x.begin(), x.end()
#define int long long
#define pq priority_queue
#define eb emplace_back
#define lb lower_bound
#define ub upper_bound
#define pb push_back
#define pp pop_back
#define F first
#define S second

using namespace std;

int ans = 100500;
int a[5][5];
int cx = 0;
int R, C;

void shift_r(int r, int v){
	int b[5];
	for (int i = 0; i < C; i++) b[i] = a[r][(i + v) % C];
	for (int i = 0; i < C; i++) a[r][i] = b[i];
}
void shift_c(int c, int v){
	int b[5];
	for (int i = 0; i < R; i++) b[i] = a[(i + v) % R][c];
	for (int i = 0; i < R; i++) a[i][c] = b[i];
}
 
int diff(int x, int y, int C) {return min(C - abs(x - y), abs(x - y));}
 
void find() {
	bool check = 1;
	for (int i = 0; i < R; i++)
	for (int j = 1; j < C; j++)
		check &= (a[i][j] == a[i][0]);
	
	if (check) ans = min(ans, cx);
	
	int b[5];
	for (int i = 0; i < C; i++) b[i] = a[0][i];
	
	map<int, int> M[5];
	for (int i = 0; i < R; i++) {
		bool r_eq = 0;

		for (int tr = 0; tr < C; tr++) {
			bool eq = 1;

			for (int j = 0; j < C; j++) eq &= b[j] == a[i][j];

			r_eq |= eq;

			if (eq) M[i][tr]++;
			
			shift_r(i, 1);
		}

		if (!r_eq) return;
	}
	
	for (int i = 0; i < C; i++) {
		int c = i, cost = 0;
		
		for (int j = 0; j < R; j++) {
			int mnc = 10;
			
			for (auto k : M[j]) mnc = min(mnc, diff(c, k.F, C));
			
			cost += mnc;
		}
		ans = min(ans, cost + cx);
	}
}
 
void calc(int x) {
	if (x == C) {find(); return ;}
	
	for (int i = 0; i < R; i++) {
		cx += min(i, R - i);
			calc(x + 1);
			shift_c(x, 1);
		cx -= min(i, R - i);
	}
}

void solve () {
	cin >> R >> C;
	for (int i = 0; i < R; i++)
	for (int j = 0; j < C; j++)
		cin >> a[i][j];

	calc(0);
	cout << ans << endl;
}
signed main() {IOS solve(); return 0;}

• Subtask 1: 100 / 100