oj.uz

Submission #593279

# Submission time Handle Problem Language Result Execution time Memory
593279 2022-07-10T18:55:41 Z slime Event Hopping (BOI22_events) C++14
10 / 100
 1500 ms 4044 KB 
#include "bits/stdc++.h"
using namespace std;
#define int long long
#ifdef ONLINE_JUDGE
const int MAXN = 3e5 + 10;
#endif
#ifndef ONLINE_JUDGE
const int MAXN = 1029;
#endif
const int MOD = 1e9 + 7;
#define ll __int128
mt19937_64 rng((int)std::chrono::steady_clock::now().time_since_epoch().count());
int rnd(int x, int y) {
  int u = uniform_int_distribution<int>(x, y)(rng); return u;
}
ll read() { int x; cin >> x; return (ll)x; }
long long bm(long long b, long long p) {
  if(p==0) return 1 % MOD;
  long long r = bm(b, p >> 1);
  if(p&1) return (((r*r) % MOD) * b) % MOD;
  return (r*r) % MOD;
}
long long inv(long long b) { 
  return bm(b, MOD-2);
}
long long f[MAXN];
long long nCr(int n, int r) { 
  long long ans = f[n]; ans *= inv(f[r]); ans %= MOD;
  ans *= inv(f[n-r]); ans %= MOD; return ans;
}
long long fib[MAXN], lucas[MAXN];
void precomp() { 
  for(int i=0; i<MAXN; i++) f[i] = (i == 0 ? 1 % MOD : (f[i-1] * i) % MOD); 
  lucas[0] = 2;
  lucas[1] = 1;
  for(int i=2; i<MAXN; i++) lucas[i] = (lucas[i-2] + lucas[i-1]) % MOD;
  fib[0] = 0;
  fib[1] = 1;
  for(int i=2; i<MAXN; i++) fib[i] = (fib[i-2] + fib[i-1]) % MOD;
}
int fastlog(int x) {
  return (x == 0 ? -1 : 64 - __builtin_clzll(x) - 1);
}
void gay(int i) { cout << "Case #" << i << ": "; }
int csb(int l, int r, int k) { // count number of [l, r] such that i & 2^k > 0
  if(l > r) return 0;
  if(l == 0) {
    int s = r / (1ll << (k+1)); // number of complete cycles
    int t = r % (1ll << (k+1));
    int ans = s * (1ll << k);
    ans += (t >= (1ll << k) ? t - (1ll << k) + 1 : 0);
    return ans;
  }
  else return csb(0, r, k) - csb(0, l - 1, k);
}
int lis(vector<int> a) {
  int n = a.size();
  int bucket[n+1];
  for(int i=1; i<=n; i++) bucket[i] = 1e18;
  int ans = 1;
  for(int x: a) {
    auto it = lower_bound(bucket + 1, bucket +n +1, x);
    int d = distance(bucket, it);
    ans = max(ans, d);
    bucket[d] = min(bucket[d], x);
  }
  return ans;
}
void solve(int tc) {
  int n, q;
  cin >> n >> q;
  int s[n+1], e[n+1];
  for(int i=1; i<=n; i++) cin >> s[i] >> e[i];
  while(q--) {
    int a, b;
    cin >> a >> b;
    if(a == b) {
      cout << "0\n"; continue;
    }
    int ans = -1;
    for(int i=1; i<=n; i++) {
      int id = -1;
      int ma = 0;
      bool done = 0;
      for(int j=1; j<=n; j++) {
        if(s[j] <= e[a] && e[a] <= e[j] && a != j) {
          if(j == b) {
            ans = i; 
            done = 1;
            break;
          }
          if(e[j] <= e[b]) {
            if(e[j] > ma) {
              ma = e[j]; id = j;
            }
          }
        }
      }
      if(done) {
        break;
      }
      if(id == -1) {
        break;
      }
      a = id;
    }
    cout << (ans == -1 ? "impossible" : to_string(ans)) << "\n";
  }
 

}
int32_t main() {
  precomp();
  ios::sync_with_stdio(0); cin.tie(0);
  int t = 1; //cin >> t;
  for(int i=1; i<=t; i++) solve(i);
}
// I don't know geometry.
// Teaming is unfair.

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Execution timed out 1589 ms 4044 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 209 ms 356 KB Output is correct
4 Correct 26 ms 340 KB Output is correct
5 Correct 38 ms 360 KB Output is correct
6 Correct 38 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 376 KB Output is correct
9 Correct 1 ms 340 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 209 ms 356 KB Output is correct
4 Correct 26 ms 340 KB Output is correct
5 Correct 38 ms 360 KB Output is correct
6 Correct 38 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 376 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 210 ms 360 KB Output is correct
13 Correct 26 ms 380 KB Output is correct
14 Correct 38 ms 352 KB Output is correct
15 Correct 39 ms 352 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Execution timed out 1586 ms 528 KB Time limit exceeded
20 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 209 ms 356 KB Output is correct
4 Correct 26 ms 340 KB Output is correct
5 Correct 38 ms 360 KB Output is correct
6 Correct 38 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 376 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 203 ms 364 KB Output is correct
13 Correct 26 ms 340 KB Output is correct
14 Correct 38 ms 356 KB Output is correct
15 Correct 40 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Execution timed out 1584 ms 3792 KB Time limit exceeded
20 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1583 ms 3928 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Execution timed out 1589 ms 4044 KB Time limit exceeded
3 Halted 0 ms 0 KB -