Submission #255163

#	Time	Username	Problem	Language	Result	Execution time	Memory
255163		davi_bart	Jousting tournament (IOI12_tournament)	C++14	100 / 100	265 ms	15136 KiB

tournament

#pragma GCC optimize("O3")
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
using namespace __gnu_pbds;
#define o_set tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update>
typedef long long ll;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
vector<bool> v;
vector<pair<int,int> >q;
vector<pair<int,int> >group;
vector<pair<int,int> >x[100010];
o_set sx,dx;
int GetBestPosition(int N,int C,int R,int *K,int *S,int *E){
  for(int i=0;i<N-1;i++){
      v.push_back(K[i]>R);
  }
  for(int i=0;i<N;i++){
    sx.insert(i);
    dx.insert(i);
  }
  for(int i=0;i<C;i++){
    auto l=sx.find_by_order(S[i]);
    auto r=dx.find_by_order(E[i]);
    int a=*l,b=*r;
    q.push_back({a,b});
    l++;
    vector<int> elim;
    while(l!=sx.end() && *l<=b){
      elim.push_back(*l);
      l++;
    }
    for(int y:elim)sx.erase(y);
    elim.clear();
    r--;
    while(*r>=a){
      elim.push_back(*r);
      if(r==dx.begin())break;
      r--;
    }
    for(int y:elim)dx.erase(y);
  }
  for(int i=0;i<N-1;i++){
    if(v[i]==0){
      if(i==0 || v[i-1]==1)group.push_back({i,i});
      else group.back().second++;
    }
  }
  for(int i=0;i<C;i++){
    int pos=upper_bound(group.begin(),group.end(),q[i])-group.begin();
    if(pos==group.size() || q[i].first<group[pos].first)pos--;
    if(pos<0)continue;
    if(q[i].first>=group[pos].first && group[pos].second>=q[i].second-1)x[pos].push_back(q[i]);
  }
  int ma=0,best=0;
  for(int i=0;i<group.size();i++){
    if(x[i].size()<=ma)continue;
    vector<int> k(group[i].second-group[i].first+100,0);
    for(int j=0;j<x[i].size();j++){
      k[x[i][j].first-group[i].first]++;
      k[x[i][j].second-group[i].first+1]--;
    }
    for(int j=0;j<k.size();j++){
      if(j>0)k[j]+=k[j-1];
      if(k[j]>ma){
        ma=k[j];
        best=j+group[i].first;
      }
    }
  }
  //cout<<ma<<endl;
  return best;
}
/*
#define inbuf_len 1 << 16
#define outbuf_len 1 << 16

int GetBestPosition(int N, int C, int R, int *K, int *S, int *E);

int main() {
  int tmp;
  char *inbuf, *outbuf;
  inbuf = (char*) malloc(inbuf_len * sizeof(char));
  outbuf = (char*) malloc(outbuf_len * sizeof(char));
  tmp = setvbuf(stdin, inbuf, _IOFBF, inbuf_len);
  assert(tmp == 0);
  tmp = setvbuf(stdout, outbuf, _IOFBF, outbuf_len);
  assert(tmp == 0);
  int N, C, R;
  int *K, *S, *E;
  tmp = scanf("%d %d %d", &N, &C, &R);
  assert(tmp == 3);
  K = (int*) malloc((N-1) * sizeof(int));
  S = (int*) malloc(C * sizeof(int));
  E = (int*) malloc(C * sizeof(int));
  int i;
  for (i = 0; i < N-1; i++) {
    tmp = scanf("%d", &K[i]);
    assert(tmp == 1);
  }
  for (i = 0; i < C; i++) {
    tmp = scanf("%d %d", &S[i], &E[i]);
    assert(tmp == 2);
  }
  printf("%d\n", GetBestPosition(N, C, R, K, S, E));
  return 0;
}*/
/*
5 3 3
1 0 2 4
1 3
0 1
0 1
*/

Compilation message (stderr)

tournament.cpp: In function 'int GetBestPosition(int, int, int, int*, int*, int*)':
tournament.cpp:51:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if(pos==group.size() || q[i].first<group[pos].first)pos--;
        ~~~^~~~~~~~~~~~~~
tournament.cpp:56:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<group.size();i++){
               ~^~~~~~~~~~~~~
tournament.cpp:57:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if(x[i].size()<=ma)continue;
        ~~~~~~~~~~~^~~~
tournament.cpp:59:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int j=0;j<x[i].size();j++){
                 ~^~~~~~~~~~~~
tournament.cpp:63:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int j=0;j<k.size();j++){
                 ~^~~~~~~~~

• Subtask 1: 17 / 17
• Subtask 2: 32 / 32
• Subtask 3: 51 / 51