oj.uz

Submission #235247

# Submission time Handle Problem Language Result Execution time Memory
235247 2020-05-27T13:58:51 Z Nodir_Bobiev Lamps (JOI19_lamps) C++17
0 / 100
 1000 ms 92284 KB 
/*
+----------------------------------------------------------------+
| In the name of Allah, the most Gracious and the most Merciful. |
+----------------------------------------------------------------+
Our hearts quake with fear of you
Our hearts wake with love for you
And to Islam we must be true
In everything we think and do.
--------------------------------
When your heart is breaking
And your pain makes you fall
Remember just remember
Allah Sees it all.
*/
# include <bits/stdc++.h>
# define FILE
using namespace std;

const int N = 1e6 + 100;
const int inf = 9;
string A,B;
int n;
vector < vector < int > > dp[N];
vector < vector < int > > oper= { {}, {1}, {2}, {3}, {1,1}, 
                                  {1,2}, {1,3}, {2,1}, {2,2}, 
                                  {2,3}, {3,1}, {3,2}, {3,3}, 
                                  {1,2,3}, {1,3,2}, {2,1,3},
                                  {2,3,1}, {3,1,2}, {3,2,1}
                                };  
char op(int x, char c){
    if( x == 0 ) return c;
    if( x == 1 ) return '0';
    if( x == 2 ) return '1';
    if( c == '1' ) return '0';
    return '1';
}
int get( vector < int >&v1, vector < int >&v2, int i=0, int j=0 ){
    if( i == (int)v1.size() || j == (int)v2.size()-1)return 0;
    int mx = 0;
    if( v1[i] == v2[j] ) mx = get(v1, v2, i+1, j+1) + 1;
    mx = max({mx, get(v1, v2, i+1, j), get(v1, v2, i, j+1)});
    return mx;
}

int main(){
    # ifdef FILEs
        freopen( "input.txt", "r", stdin );
        freopen( "output.txt", "w", stdout );
    # endif
    ios_base::sync_with_stdio(false);
    cin >> n >> A >> B;
    A = '0' + A;
    B = '0' + B;

    dp[0].push_back({0});

    for( int i = 1; i <= n; i ++ ){
        for( auto &v1: oper ){
            for( auto c: v1 )
                A[i] = op(c, A[i]);
            if( A[i] != B[i] )
                continue;
            int res = inf;
            for( auto v2: dp[i-1] ){
                res = min( res, v2.back() + (int)v1.size() - get(v1, v2) );
            }
            if( res != inf ){
                v1.push_back(res);
                dp[i].push_back(v1);
                v1.pop_back();
            }
        }
    }
    int ans = inf;
    for( auto vc: dp[n] )ans = min( ans, vc.back() );
    cout << ans;
}

Subtask #1
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 23808 KB Output is correct
2 Correct 18 ms 23680 KB Output is correct
3 Incorrect 18 ms 23808 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 23808 KB Output is correct
2 Correct 18 ms 23680 KB Output is correct
3 Incorrect 18 ms 23808 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 23808 KB Output is correct
2 Correct 23 ms 23808 KB Output is correct
3 Correct 21 ms 23808 KB Output is correct
4 Correct 18 ms 23808 KB Output is correct
5 Correct 18 ms 23808 KB Output is correct
6 Correct 18 ms 23808 KB Output is correct
7 Execution timed out 1095 ms 92284 KB Time limit exceeded
8 Halted 0 ms 0 KB -

Subtask #4
0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 23808 KB Output is correct
2 Correct 18 ms 23680 KB Output is correct
3 Incorrect 18 ms 23808 KB Output isn't correct
4 Halted 0 ms 0 KB -