oj.uz

Submission #230142

# Submission time Handle Problem Language Result Execution time Memory
230142 2020-05-08T17:06:09 Z xiaowuc1 Walk (POI13_spa) C++14
49 / 100
 5000 ms 222404 KB 
#include <algorithm>
#include <bitset>
#include <cassert>
#include <chrono>
#include <complex>
#include <cstring>
#include <iomanip>
#include <iostream>
#include <map>
#include <queue>
#include <random>
#include <set>
#include <stack>
#include <unordered_set>
#include <vector>

using namespace std;

// BEGIN NO SAD
#define rep(i, a, b) for(int i = a; i < (b); ++i)
#define trav(a, x) for(auto& a : x)
#define all(x) x.begin(), x.end()
#define sz(x) (int)(x).size()
#define derr if(1) cerr
typedef vector<int> vi;
// END NO SAD

typedef long long ll;
typedef pair<int, int> pii;
typedef vector<vector<ll>> matrix;

typedef pair<int, pii> state;

struct custom_hash {
    static uint64_t splitmix64(uint64_t x) {
        // http://xorshift.di.unimi.it/splitmix64.c
        x += 0x9e3779b97f4a7c15;
        x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
        x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
        return x ^ (x >> 31);
    }

    size_t operator()(uint64_t x) const {
        static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
        return splitmix64(x + FIXED_RANDOM);
    }
};

ll parse() {
  string s;
  cin >> s;
  ll ret = 0;
  for(int i = 0; i < sz(s); i++) {
    ret <<= 1;
    ret |= s[i] == '1';
  }
  return ret;
}
vector<ll> bad;
int n, k;
unordered_set<ll, custom_hash> s;
ll all[5000001];
bool done = false;
bool finite(ll src, ll snk) {
  s.clear();
  int allsz = 0;
  all[allsz++] = src;
  s.insert(src);
  for(int i = 0; i < allsz && allsz <= n*k; i++) {
    for(int j = 0; j < n; j++) {
      ll curr = all[i] ^ (1LL << j);
      if(s.count(curr)) continue;
      auto it = lower_bound(all(bad), curr);
      if(it != bad.end() && *it == curr) continue;
      s.insert(curr);
      all[allsz++] = curr;
    }
  }
  if(s.count(snk)) done = true;
  return !s.count(snk) && allsz <= n*k;
}
void solve() {
  cin >> n >> k;
  ll src = parse();
  ll snk = parse();
  bad.reserve(k);
  s.reserve(n*k+n+1);
  for(int i = 0; i < k; i++) {
    bad.push_back(parse());
  }
  sort(all(bad));
  if(finite(src, snk)) {
    cout << "NIE\n";
    return;
  }
  if(!done && finite(snk, src)) {
    cout << "NIE\n";
    return;
  }
  cout << "TAK\n";
}
// are there edge cases (N=1?)
// are array sizes proper (scaled by proper constant, for example 2* for koosaga tree)
// integer overflow?
// DS reset properly between test cases

int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL); cout.tie(NULL);
  solve();
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 640 KB Output is correct
2 Correct 6 ms 512 KB Output is correct
3 Correct 7 ms 512 KB Output is correct
4 Correct 18 ms 1024 KB Output is correct
5 Correct 17 ms 1152 KB Output is correct
6 Correct 4 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 4 ms 384 KB Output is correct
9 Correct 4 ms 384 KB Output is correct
10 Correct 4 ms 384 KB Output is correct
11 Correct 99 ms 36472 KB Output is correct

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 134 ms 42616 KB Output is correct
2 Correct 362 ms 37624 KB Output is correct
3 Execution timed out 5053 ms 148728 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 896 KB Output is correct
2 Correct 58 ms 7032 KB Output is correct
3 Correct 116 ms 7036 KB Output is correct
4 Correct 32 ms 2304 KB Output is correct
5 Correct 17 ms 2304 KB Output is correct
6 Correct 5 ms 384 KB Output is correct

Subtask #4
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 2944 KB Output is correct
2 Correct 6 ms 1152 KB Output is correct
3 Correct 56 ms 4864 KB Output is correct
4 Correct 240 ms 12924 KB Output is correct
5 Correct 95 ms 13052 KB Output is correct

Subtask #5
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 82 ms 41208 KB Output is correct
2 Correct 3838 ms 222404 KB Output is correct
3 Execution timed out 5086 ms 222256 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #6
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 41080 KB Output is correct
2 Correct 731 ms 59708 KB Output is correct
3 Correct 1597 ms 59804 KB Output is correct
4 Execution timed out 5073 ms 161504 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #7
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 107 ms 41976 KB Output is correct
2 Execution timed out 5091 ms 197232 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #8
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 108 ms 41976 KB Output is correct
2 Correct 83 ms 16120 KB Output is correct
3 Correct 3687 ms 82276 KB Output is correct
4 Correct 4291 ms 169468 KB Output is correct
5 Correct 4295 ms 169532 KB Output is correct