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Submission #316616

# Submission time Handle Problem Language Result Execution time Memory
316616 2020-10-26T23:09:25 Z thecodingwizard Walk (POI13_spa) C++11
49 / 100
 5000 ms 262144 KB 
#include <bits/stdc++.h>

using namespace std;

using ll = long long;

int n, k; 
unordered_set<ll> dead;

ll read() {
    string s; cin >> s;
    ll num = 0;
    for (int i = n-1; i >= 0; i--) {
        if (s[n-1-i] == '1') {
            num |= (1LL << i);
        }
    }
    return num;
}

// return true if a can reach b or if a can reach at least ct nodes
bool solve(ll a, ll b, int ct) {
    unordered_set<ll> vis;

    queue<ll> q; q.push(a);
    vis.insert(a);
    --ct;

    while (!q.empty()) {
        ll u = q.front(); q.pop();
        for (int i = 0; i < n; i++) {
            ll v = u ^ (1LL << i);
            if (vis.count(v) || dead.count(v)) continue;
            --ct;
            if (ct == 0 || v == b) return true;
            vis.insert(v);
            q.push(v);
        }
    }
    return false;
}

int main() {
    cin.tie(0)->sync_with_stdio(0);

    cin >> n >> k;

    ll a, b; a = read(), b = read();
    if (a == b) {
        cout << "TAK\n";
        return 0;
    }
    for (int i = 0; i < k; i++) {
        ll x = read();
        dead.insert(x);
    }

    cout << (solve(a, b, n*k+1) && solve(b, a, n*k+1) ? "TAK" : "NIE") << endl;

    return 0;
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 2 ms 512 KB Output is correct
4 Correct 13 ms 1024 KB Output is correct
5 Correct 7 ms 1024 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 110 ms 9408 KB Output is correct

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 204 ms 10580 KB Output is correct
2 Correct 381 ms 12732 KB Output is correct
3 Execution timed out 5090 ms 150716 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 69 ms 8344 KB Output is correct
3 Correct 136 ms 8844 KB Output is correct
4 Correct 26 ms 2580 KB Output is correct
5 Correct 14 ms 2444 KB Output is correct
6 Correct 1 ms 512 KB Output is correct

Subtask #4
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 512 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 80 ms 5680 KB Output is correct
4 Correct 335 ms 16624 KB Output is correct
5 Correct 178 ms 16704 KB Output is correct

Subtask #5
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 95 ms 5272 KB Output is correct
2 Runtime error 4633 ms 262144 KB Execution killed with signal 9 (could be triggered by violating memory limits)
3 Halted 0 ms 0 KB -

Subtask #6
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 89 ms 4504 KB Output is correct
2 Correct 1269 ms 67572 KB Output is correct
3 Correct 2409 ms 73124 KB Output is correct
4 Execution timed out 5083 ms 169748 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #7
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 163 ms 8892 KB Output is correct
2 Execution timed out 5063 ms 174400 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #8
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 165 ms 8640 KB Output is correct
2 Correct 70 ms 4380 KB Output is correct
3 Correct 4110 ms 83268 KB Output is correct
4 Correct 96 ms 7324 KB Output is correct
5 Correct 4956 ms 170436 KB Output is correct