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Submission #260199

# Submission time Handle Problem Language Result Execution time Memory
260199 2020-08-09T17:43:18 Z muhammad_hokimiyon Lamps (JOI19_lamps) C++14
4 / 100
 74 ms 27820 KB 
#include <bits/stdc++.h>

//#pragma GCC optimize("Ofast")

#define fi first
#define se second
#define ll long long
#define dl double long

using namespace std;

const int NN = 1e9 + 7;
const int N = 1e6 + 1;
const int M = 2;
const ll mod = 1e9 + 7;
const int inf = 1e9 + 7;
const dl rf = 1e-14;
const int B = sqrt(N);
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int n;
string s,t;
int d[N][3][2];

void upd( int &x , int y )
{
    x = min( x , y );
}

void solve1()
{
    cin >> n >> s >> t;
    s = '#' + s;
    t = '#' + t;
    for( int i = 0; i <= n; i++ ){
        for( int j = 0; j < 3; j++ ){
            for( int h = 0; h < 2; h++ ){
                d[i][j][h] = 1e9;
            }
        }
    }
    d[0][0][0] = 0;
    for( int i = 1; i <= n; i++ ){
        for( int j = 0; j < 3; j++ ){
            for( int h = 0; h < 2; h++ ){
                upd( d[i][j][h] , d[i - 1][j][h] );
                upd( d[i][0][h] , d[i - 1][j][h] );
                upd( d[i][j][0] , d[i - 1][j][h] );
                upd( d[i][0][0] , d[i - 1][j][h] );
                if( j == 0 ){
                    upd( d[i][1][0] , d[i - 1][j][h] + 1 );
                    upd( d[i][2][0] , d[i - 1][j][h] + 1 );
                    if( h == 0 ){
                        upd( d[i][1][1] , d[i - 1][j][h] + 2 );
                        upd( d[i][2][1] , d[i - 1][j][h] + 2 );
                    }
                }
                if( h == 0 ){
                    upd( d[i][j][1] , d[i - 1][j][h] + 1 );
                }
            }
        }
        for( int j = 0; j < 3; j++ ){
            for( int h = 0; h < 2; h++ ){
                int a = s[i] - '0';
                int b = t[i] - '0';
                if( j == 1 )a = 0;
                else if( j == 2 )a = 1;
                if( h == 1 )a ^= 1;
                if( a != b ){
                    d[i][j][h] = 1e9;
                }
            }
        }
    }
    int res = 1e9;
    for( int i = 0; i < 3; i++ ){
        for( int h = 0; h < 2; h++ ){
            res = min( res , d[n][i][h] );
        }
    }
    cout << res;
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    //freopen( "input.txt" , "r" , stdin );
    //freopen( "output.txt" , "w" , stdout );

    int cghf = 1;//cin >> cghf;
    while( cghf-- ){
        solve1();
    }
}

Subtask #1
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 0 ms 384 KB Output is correct
13 Incorrect 1 ms 384 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #2
0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 0 ms 384 KB Output is correct
13 Incorrect 1 ms 384 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #3
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 74 ms 27816 KB Output is correct
8 Correct 72 ms 27820 KB Output is correct
9 Correct 74 ms 27820 KB Output is correct
10 Correct 68 ms 27820 KB Output is correct
11 Correct 69 ms 27820 KB Output is correct
12 Correct 70 ms 27812 KB Output is correct
13 Correct 69 ms 27820 KB Output is correct
14 Correct 68 ms 27820 KB Output is correct

Subtask #4
0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 0 ms 384 KB Output is correct
13 Incorrect 1 ms 384 KB Output isn't correct
14 Halted 0 ms 0 KB -