Submission #235246

#	Time	Username	Problem	Language	Result	Execution time	Memory
235246		Nodir_Bobiev	Lamps (JOI19_lamps)	C++17	6 / 100	1090 ms	40640 KiB

lamp

/*
+----------------------------------------------------------------+
| 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];

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( int a = 0; a < 4; a ++ ){
            for( int b = 0; b < 4; b ++ ){
                for( int c = 0; c < 4; c ++ ){
                    if( op(c,op(b,op(a,A[i]))) != B[i] ) continue;
                    
                    vector < int > vv;
                    if( a ) vv.push_back( a ); 
                    if( b ) vv.push_back( b );
                    if( c ) vv.push_back( c );

                    int mn = inf;
                    for( auto vc: dp[i-1] ){
                        mn = min(mn, vc.back()-get(vv, vc)+(int)vv.size());
                    }
                    if( mn != inf ){
                        vv.push_back(mn);
                        dp[i].push_back(vv);
                    }
                }
            }
        }
    }
    int ans = inf;
    for( auto vc: dp[n] )ans = min( ans, vc.back() );
    cout << ans;
}

• Subtask 1: 6 / 6
• Subtask 2: 0 / 41
• Subtask 3: 0 / 4
• Subtask 4: 0 / 49