oj.uz

답안 #118268

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
118268 2019-06-18T13:58:55 Z MAMBA 코끼리 (Dancing Elephants) (IOI11_elephants) C++17
97 / 100
 9000 ms 15024 KB 
#include "elephants.h"
#include <bits/stdc++.h>

using namespace std;

inline void read() {}
template <class S>
inline void read(S &arg) {
  cin >> arg;
}
template <class S>
inline void readA(S Lptr, S Rptr) {
  while (Lptr != Rptr) {
    read(*Lptr);
    Lptr++;
  }
}
template <class S, class... T>
inline void read(S &arg, T &... rest) {
  read(arg);
  read(rest...);
}

inline void write() {}
template <class S>
inline void write(S arg) {
  cout << arg;
}
template <class S>
inline void writeA(S Lptr, S Rptr, char C_ = ' ') {
  if (Lptr != Rptr) {
    write(*Lptr);
    Lptr++;
  }
  while (Lptr != Rptr) {
    write(C_);
    write(*Lptr);
    Lptr++;
  }
}
template <class S, class... T>
inline void write(S arg, T... rest) {
  write(arg);
  write(' ');
  write(rest...);
}

#define rep(i, j, k) for (int i = j; i < (int)k; i++)
#define pb push_back
#define mt make_tuple
#define all(x) x.begin(), x.end()

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;

template <class T, class S>
inline bool smin(T &a, S b) {
  return (T)b < a ? a = b, 1 : 0;
}
template <class T, class S>
inline bool smax(T &a, S b) {
  return a < (T)b ? a = b, 1 : 0;
}

constexpr int MOD = 1e9 + 7;
constexpr int N = 150 * 1000 + 10;

template <typename T>
inline T mod(T &v) {
  return v = (v % MOD + MOD) % MOD;
}
template <typename S, typename T>
inline S add(S &l, T r) {
  return mod(l += r);
}

ll po(ll v, ll u) {
  return u ? po(v * v % MOD, u >> 1) * (u & 1 ? v : 1) % MOD : 1;
}

const int sq = 600;

int n, L, pos[N];
vector<pii> s[N / sq + 10];
vector<pii> dp[N / sq + 10];

void relax(int id) {
  sort(all(s[id]));
  dp[id] = vector<pii>(s[id].size());
  int z = s[id].size();
  for (int i = s[id].size() - 1; ~i; i--) {
    while (s[id][z - 1].first > s[id][i].first + L) z--;
    dp[id][i].first = 1;
    dp[id][i].second = s[id][i].first + L;
    if (z != s[id].size()) {
      dp[id][i].first += dp[id][z].first;
      dp[id][i].second = dp[id][z].second;
    }
  }
}

void init(int n_, int L_, int X[]) {
  n = n_;
  L = L_;
  memcpy(pos, X, 4 * n_);
  vector<pii> vec;
  rep(i, 0, n) vec.pb({X[i], i});
  sort(all(vec));
  for (int i = 0; i * sq < n; i++) {
    int l = i * sq;
    int r = min(n, l + sq);
    s[i].clear();
    rep(j, l, r) s[i].pb(vec[j]);
    relax(i);
  }
}

int Nu;
int update(int me, int y) {
  if (n == 1) return 1;
  Nu++;
  if (Nu % sq == 0) init(n, L, pos);

  bool flag = false;
  for (int i = 0; !flag; i++)
    if (s[i].size() && pii(pos[me], me) <= s[i].back()) {
      for (int j = 0; !flag; j++)
        if (s[i][j] == pii(pos[me], me)) {
          s[i].erase(s[i].begin() + j);
          flag = true;
        }
      relax(i);
    }

  pos[me] = y;
  for (int i = 0;; i++)
    if ((i + 1) * sq >= n || (s[i].size() && pii(pos[me], me) <= s[i].back())) {
      s[i].pb(pii(pos[me], me));
      relax(i);
      break;
    }
  int res = 0;
  int last = -1;
  for (int i = 0; i * sq < n; i++) {
    if (s[i].empty() || s[i].back().first <= last) continue;
    int id = lower_bound(all(s[i]), pii(last + 1, -1)) - s[i].begin();
    res += dp[i][id].first;
    last = dp[i][id].second;
  }
  return res;
}

Compilation message

elephants.cpp: In function 'void relax(int)':
elephants.cpp:97:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if (z != s[id].size()) {
         ~~^~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct

Subtask #2
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 3 ms 384 KB Output is correct

Subtask #3
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 2255 ms 1872 KB Output is correct
8 Correct 2680 ms 2372 KB Output is correct
9 Correct 1811 ms 3652 KB Output is correct
10 Correct 1087 ms 3556 KB Output is correct
11 Correct 1042 ms 3584 KB Output is correct
12 Correct 2444 ms 3680 KB Output is correct
13 Correct 1125 ms 3500 KB Output is correct

Subtask #4
47.0 / 47.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 2255 ms 1872 KB Output is correct
8 Correct 2680 ms 2372 KB Output is correct
9 Correct 1811 ms 3652 KB Output is correct
10 Correct 1087 ms 3556 KB Output is correct
11 Correct 1042 ms 3584 KB Output is correct
12 Correct 2444 ms 3680 KB Output is correct
13 Correct 1125 ms 3500 KB Output is correct
14 Correct 2193 ms 2544 KB Output is correct
15 Correct 2552 ms 2628 KB Output is correct
16 Correct 3735 ms 4068 KB Output is correct
17 Correct 3918 ms 5324 KB Output is correct
18 Correct 3987 ms 5340 KB Output is correct
19 Correct 4959 ms 5188 KB Output is correct
20 Correct 3798 ms 5300 KB Output is correct
21 Correct 3570 ms 5304 KB Output is correct
22 Correct 2055 ms 5076 KB Output is correct

Subtask #5
0 / 3.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 2255 ms 1872 KB Output is correct
8 Correct 2680 ms 2372 KB Output is correct
9 Correct 1811 ms 3652 KB Output is correct
10 Correct 1087 ms 3556 KB Output is correct
11 Correct 1042 ms 3584 KB Output is correct
12 Correct 2444 ms 3680 KB Output is correct
13 Correct 1125 ms 3500 KB Output is correct
14 Correct 2193 ms 2544 KB Output is correct
15 Correct 2552 ms 2628 KB Output is correct
16 Correct 3735 ms 4068 KB Output is correct
17 Correct 3918 ms 5324 KB Output is correct
18 Correct 3987 ms 5340 KB Output is correct
19 Correct 4959 ms 5188 KB Output is correct
20 Correct 3798 ms 5300 KB Output is correct
21 Correct 3570 ms 5304 KB Output is correct
22 Correct 2055 ms 5076 KB Output is correct
23 Correct 8173 ms 9972 KB Output is correct
24 Execution timed out 9075 ms 15024 KB Time limit exceeded
25 Halted 0 ms 0 KB -