oj.uz

Submission #157004

# Submission time Handle Problem Language Result Execution time Memory
157004 2019-10-09T02:49:10 Z atoiz Lamps (JOI19_lamps) C++14
4 / 100
 44 ms 3220 KB 
#include <iostream>
#include <fstream>
#include <vector>
#include <algorithm>
#include <cstring>
#include <string>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cassert>
#include <numeric>
#include <utility>
#include <tuple>
#include <bitset>
#include <climits>
#include <random>
#include <chrono>
#include <set>
#include <unordered_set>
#include <map>
#include <unordered_map>
#include <queue>
#include <ios>
#include <iomanip>

using namespace std;

#define FOR(i, a, b) for (int i = a; i <= b; ++i)
#define FORA(i, a) for (auto &i : a)
#define FORB(i, a, b) for (int i = a; i >= b; --i)
#define SZ(a) ((int) a.size())
#define ALL(a) begin(a), end(a)

using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

const int INF = 1e9;
int N;
string A, B;
int F[3][4], G[3][4];
void upd(int &a, int b) { if (a > b) a = b; }

signed main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> N >> A >> B;
    FOR(i, 0, 2) FOR(j, 0, 3) F[i][j] = INF;
    F[2][0] = 0;

    FOR(idx, 0, N - 1) {
        FOR(i, 0, 2) FOR(j, 0, 3) G[i][j] = INF;
        FOR(i, 0, 2) {
            upd(G[i][1], F[i][0] + 1);
            if (idx > 0 && B[idx - 1] == B[idx]) {
                FOR(j, 1, 3) upd(G[i][j], F[i][j]);
            } else {
                upd(G[i][2], F[i][1] + 1);
                upd(G[i][3], F[i][2]);
                upd(G[i][2], F[i][3] + 1);
            }
        }

        bool toggle = (A[idx] != B[idx]);
        FOR(j, 0, 3) {
            upd(G[toggle][0], F[toggle][j]);
            upd(G[toggle][0], F[!toggle][j] + toggle);
            upd(G[toggle][0], F[2][j] + toggle);
        }

        FOR(i, 0, 2) FOR(j, 0, 3) F[i][j] = G[i][j];
    }

    int ans = INF;
    FOR(i, 0, 2) FOR(j, 0, 3) upd(ans, F[i][j]);
    cout << ans << endl;
}

Subtask #1
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 248 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 380 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 2 ms 376 KB Output is correct
22 Correct 2 ms 380 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Incorrect 2 ms 376 KB Output isn't correct
27 Halted 0 ms 0 KB -

Subtask #2
0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 248 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 380 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 2 ms 376 KB Output is correct
22 Correct 2 ms 380 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Incorrect 2 ms 376 KB Output isn't correct
27 Halted 0 ms 0 KB -

Subtask #3
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 44 ms 3088 KB Output is correct
8 Correct 31 ms 3104 KB Output is correct
9 Correct 30 ms 3092 KB Output is correct
10 Correct 30 ms 3088 KB Output is correct
11 Correct 31 ms 3220 KB Output is correct
12 Correct 44 ms 3088 KB Output is correct
13 Correct 43 ms 2964 KB Output is correct
14 Correct 42 ms 3124 KB Output is correct

Subtask #4
0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 248 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 380 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 2 ms 376 KB Output is correct
22 Correct 2 ms 380 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Incorrect 2 ms 376 KB Output isn't correct
27 Halted 0 ms 0 KB -