Submission #800392

#	Time	Username	Problem	Language	Result	Execution time	Memory
800392		erray	Teams (IOI15_teams)	C++17	77 / 100	4069 ms	331624 KiB

teams

#include "teams.h"

#include<bits/stdc++.h>

using namespace std;

#ifdef DEBUG 
  #include "/home/ioi/codes/ioi15_d1/debug.h"
#else 
  #define debug(...) void(37)
#endif

template<typename T> 
vector<T> inverse_fuck(T* a, int N) {
  vector<T> res(N);
  for (int i = 0; i < N; ++i) {
    res[i] = a[i];
  }
  return res;
}

int ll = -1;
namespace PST {
  struct node {
    node* l = NULL;
    node* r = NULL;
    int sum = 0;
  };
  node* modify(node* prev, int l, int r, int p) {
    debug(l, r);
    node* v = new node();
    if (prev != NULL) {
      v->l = prev->l;
      v->r = prev->r;
      v->sum = prev->sum;
    }
    v->sum += 1;
    if (l < r) {
      int mid = (l + r) >> 1;
      if (p <= mid) {
        v->l = modify(v->l, l, mid, p);
      } else {
        v->r = modify(v->r, mid + 1, r, p);
      }
    }
    return v;
  }
  int get(node* v, int l, int r) {
    if (l >= ll) {
      return v->sum;
    }
    int mid = (l + r) >> 1;
    int res = 0;
    if (ll <= mid) {
      res += (v->l == NULL ? 0 : get(v->l, l, mid));
      res += (v->r != NULL ? v->r->sum : 0);
    } else if (v->r != NULL) {
      res += get(v->r, mid + 1, r);
    }
    return res;
  }
}

struct SegTree {
  int n;
  vector<PST::node*> roots;
  SegTree(int _n) : n(_n) {
    roots.resize(1);
    roots[0] = new PST::node();
  }
  SegTree() { } 
  PST::node* modify(int x) {
     roots.push_back(PST::modify(roots.back(), 0, n - 1, x));
     return roots.back();
  }
  int get(PST::node* v) {
    return PST::get(v, 0, n - 1);
  }
};

int N;
vector<array<int, 2>> A;
SegTree st;
vector<PST::node*> vers;
vector<int> pt;
void init(int __N, int __A[], int __B[]) {
  
  N = __N;
  auto L = inverse_fuck(__A, N);
  auto R = inverse_fuck(__B, N);
  debug(N, L, R);
  A.resize(N);
  for (int i = 0; i < N; ++i) {
    A[i] = array<int, 2>{L[i], R[i]};
  }
  sort(A.begin(), A.end());
  debug(A);
  st = SegTree(N + 1);
  for (int i = 0; i < N; ++i) {
    debug(i);
    auto v = st.modify(A[i][1]);
    if (i == N - 1|| A[i + 1][0] != A[i][0]) {
      pt.push_back(A[i][0]);
      vers.push_back(v);
    }
  }
}

int can(int M, int __K[]) {
  auto K = inverse_fuck(__K, M);
  sort(K.begin(), K.end());
  if (accumulate(K.begin(), K.end(), 0LL) > N) {
    return false;
  }
  debug(M, K);
  vector<array<int, 2>> comp;
  for (int i = 0; i < M; ++i) {
    if (i == 0 || comp.back()[0] != K[i]) {
      comp.push_back({K[i], 0}); //overflow on sums
    } 
    comp.back()[1] += K[i];
  }
  auto Contains = [&](int l, int r) {
    ll = r;
    return (l == -1 ? 0 : st.get(vers[l]));
  };
  int s = int(comp.size());
  vector<int> from(s);
  int p = -1;
  for (int i = 0; i < s; ++i) {
    while (p + 1 < int(pt.size()) && pt[p + 1] <= comp[i][0]) {
      ++p;
    }
    from[i] = p;
  }
  debug(comp, from);
  vector<int> dp(s);
  for (int i = 0; i < s; ++i) {
    auto[x, sz] = comp[i];
    dp[i] = 0;
    for (int j = 0; j < i; ++j) {
      dp[i] = min(dp[i], dp[j] - Contains(from[j], x));
    }
    dp[i] += Contains(from[i], x) - sz;
    if (dp[i] < 0) {
      return false;
    }
  }
	return true;
}

• Subtask 1: 21 / 21
• Subtask 2: 13 / 13
• Subtask 3: 43 / 43
• Subtask 4: 0 / 23