oj.uz

Submission #58139

# Submission time Handle Problem Language Result Execution time Memory
58139 2018-07-17T03:09:42 Z Benq Riddick's Cube (IZhO13_riddicks) C++14
100 / 100
 163 ms 920 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>

using namespace std;
using namespace __gnu_pbds;
 
typedef long long ll;
typedef long double ld;
typedef complex<ld> cd;

typedef pair<int, int> pi;
typedef pair<ll,ll> pl;
typedef pair<ld,ld> pd;

typedef vector<int> vi;
typedef vector<ld> vd;
typedef vector<ll> vl;
typedef vector<pi> vpi;
typedef vector<pl> vpl;
typedef vector<cd> vcd;

template <class T> using Tree = tree<T, null_type, less<T>, rb_tree_tag,tree_order_statistics_node_update>;

#define FOR(i, a, b) for (int i=a; i<(b); i++)
#define F0R(i, a) for (int i=0; i<(a); i++)
#define FORd(i,a,b) for (int i = (b)-1; i >= a; i--)
#define F0Rd(i,a) for (int i = (a)-1; i >= 0; i--)

#define sz(x) (int)(x).size()
#define mp make_pair
#define pb push_back
#define f first
#define s second
#define lb lower_bound
#define ub upper_bound
#define all(x) x.begin(), x.end()

const int MOD = 1000000007;
const ll INF = 1e18;
const int MX = 100001;

int N,M,g[5][5], ret = 100500;
vi cur;

void rotCol(int ind) {
    char c = g[0][ind];
    F0R(i,N-1) g[i][ind] = g[i+1][ind];
    g[N-1][ind] = c;
}

void rotRow(int ind) {
    char c = g[ind][0];
    F0R(i,M-1) g[ind][i] = g[ind][i+1];
    g[ind][M-1] = c;
}

bool checkRows() {
    F0R(i,N) FOR(j,1,M) if (g[i][j] != g[i][0]) return 0;
    return 1;
}

bool checkCols() {
    F0R(j,M) FOR(i,1,N) if (g[i][j] != g[0][j]) return 0;
    return 1;
}

void SEARCH(int ind, int ans) {
    if (ind == N) {
        if (checkCols() || checkRows()) ret = min(ret,ans);
        return;
    }
    F0R(i,M) {
        SEARCH(ind+1,ans+min(i,M-i));
        rotRow(ind);
    }
}

void search(int ind = 0, int ans = 0) {
    if (ind == M) {
        SEARCH(0,ans);
        return;
    }
    F0R(i,N) {
        search(ind+1,ans+min(i,N-i));
        rotCol(ind);
    }
}

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin >> N >> M; cur.resize(M);
    F0R(i,N) F0R(j,M) cin >> g[i][j];
    search();
    cout << ret;
}

/* Look for:
* the exact constraints (multiple sets are too slow for n=10^6 :( ) 
* special cases (n=1?)
* overflow (ll vs int?)
* array bounds
*/

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 248 KB Output is correct
2 Correct 2 ms 360 KB Output is correct
3 Correct 2 ms 600 KB Output is correct
4 Correct 3 ms 600 KB Output is correct
5 Correct 4 ms 600 KB Output is correct
6 Correct 3 ms 600 KB Output is correct
7 Correct 2 ms 660 KB Output is correct
8 Correct 3 ms 920 KB Output is correct
9 Correct 13 ms 920 KB Output is correct
10 Correct 12 ms 920 KB Output is correct
11 Correct 12 ms 920 KB Output is correct
12 Correct 15 ms 920 KB Output is correct
13 Correct 125 ms 920 KB Output is correct
14 Correct 135 ms 920 KB Output is correct
15 Correct 163 ms 920 KB Output is correct
16 Correct 150 ms 920 KB Output is correct
17 Correct 155 ms 920 KB Output is correct
18 Correct 146 ms 920 KB Output is correct
19 Correct 150 ms 920 KB Output is correct
20 Correct 145 ms 920 KB Output is correct