oj.uz

답안 #1025255

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1025255 2024-07-16T18:25:31 Z NintsiChkhaidze Road Construction (JOI21_road_construction) C++17
59 / 100
 10000 ms 233816 KB 
#include <bits/stdc++.h>
#define pb push_back
#define s second
#define f first
#define pb push_back
#define pii pair <int,int>
#define ll long long
#define left (h<<1),l,((l + r) >> 1)
#define right ((h<<1)|1),((l + r)>>1) + 1,r
#pragma GCC target("avx,avx2,fma")
// #define int ll
#define pll pair <ll,ll>
using namespace std;
 
const int N = 3e5 + 5;
const ll inf = 1e18;
pll t[4][3*N];
int x[N],y[N],yy[N],n,k;
multiset <ll> st[4][3*N];
pii arr[N];
vector <ll> answ;
 
void upd(int i,int h,int l,int r,int idx,ll oldval,ll newval,bool z){
  if (l == r){
    if (!z) st[i][l].erase(st[i][l].find(oldval));
    st[i][l].insert(newval);
    t[i][h] = {*--st[i][l].end(),l};
    return;
  }
 
  if (idx > (l + r)/2) upd(i,right,idx, oldval, newval,z);
  else upd(i,left,idx, oldval, newval,z);
  t[i][h] = max(t[i][h*2],t[i][h*2 + 1]);
}
 
void build(int h,int l,int r){
  t[1][h] = t[2][h] = {-inf,0};
  if (l == r) {
    st[1][l].clear();
    st[2][l].clear();
    return;
  }
  build(left);
  build(right);
}
 
pll get(int i,int h,int l,int r,int L,int R){
  if (r < L || R < l) return {-inf,0LL};
  if (L <= l && r <= R) return t[i][h];
  return max(get(i,left,L,R),get(i,right,L,R));
}
 
int count(ll w,bool z){
 
  build(1,1,n);
  int tot = 0;
  for (int i = 1; i <= n; i++){
    if (tot > k) return tot;
    vector <pair <pii,pll> > roll;
 
    int id = arr[i].s;
    ll v1 = x[id] + y[id];
    while (tot <= k){
      pll res = get(1,1,1,n,1,yy[id]);
      ll w1 = v1 - res.f;
      if (w1 > w) break;
      if (z) answ.pb(w1);
 
      tot += 1;
      roll.pb({{1,res.s},{res.f,-inf}});
      upd(1,1,1,n,res.s,res.f, -inf,0);
    }
 
    ll v2 = x[id] - y[id];
    while (tot <= k){
      pll res = get(2,1,1,n,yy[id] + 1,n);
      ll w1 = v2 - res.f;
      if (w1 > w) break;
      if (z) answ.pb(w1);
 
      tot += 1;
      roll.pb({{2,res.s},{res.f,-inf}});
      upd(2,1,1,n,res.s,res.f, -inf,0);
    }
 
    for (int j = roll.size() - 1; j >= 0; j--){
      int ii = roll[j].f.f,idx = roll[j].f.s;
      ll oldval = roll[j].s.s,newval = roll[j].s.f;
      upd(ii,1,1,n,idx,oldval,newval,0);
    }
 
    upd(1,1,1,n,yy[id],-inf,v1,1);
    upd(2,1,1,n,yy[id],-inf,v2,1);
  }
 
  return tot;
}
 
signed main() {
  ios_base::sync_with_stdio(0),cin.tie(NULL),cout.tie(NULL);
	
  cin>>n>>k;
  
  vector <int> vec;
  for (int i = 1; i <= n; i++){
    cin >> x[i] >> y[i];
    vec.pb(y[i]);
  }
  sort(vec.begin(),vec.end());
  map <int,int> mp;
  int val = 0;
  for (int i=0;i<vec.size();i++){
    if (!i || vec[i] != vec[i - 1]) ++val;
    mp[vec[i]] = val;
  }
 
  for (int i= 1; i<= n; i++)
    yy[i] = mp[y[i]];
 
  for (int i = 1; i<= n; i++)
    arr[i] = {x[i],i};
  sort(arr+1,arr+n+1);
 
  ll l = 0,r = 4e9,res = -1;
  while (l <= r){
    ll mid = (l + r) >> 1;
    //umciresi w iseti rom w ze naklebi an toli wonis wiboebis raodenoba >= k ze
  
    int c = count(mid,0);
    if (c >= k) {
      res = mid;
      r = mid - 1;
    }else{
      l = mid + 1;
    }
  }
 
  int cnt1 = count(res - 1,1);
  sort(answ.begin(),answ.end());
  for (int i = 1; i <= k - cnt1; i++)
    answ.pb(res);
    
  for (ll x: answ)
    cout<<x<<endl;
}

Compilation message

road_construction.cpp: In function 'int main()':
road_construction.cpp:112:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  112 |   for (int i=0;i<vec.size();i++){
      |                ~^~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3135 ms 174600 KB Output is correct
2 Correct 2963 ms 174516 KB Output is correct
3 Correct 2970 ms 174396 KB Output is correct
4 Correct 2882 ms 174636 KB Output is correct
5 Correct 3077 ms 173372 KB Output is correct
6 Correct 86 ms 169784 KB Output is correct

Subtask #2
0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 10030 ms 218028 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6672 ms 227204 KB Output is correct
2 Correct 6738 ms 227208 KB Output is correct
3 Correct 56 ms 169552 KB Output is correct
4 Correct 2544 ms 215464 KB Output is correct
5 Correct 3973 ms 222064 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6672 ms 227204 KB Output is correct
2 Correct 6738 ms 227208 KB Output is correct
3 Correct 56 ms 169552 KB Output is correct
4 Correct 2544 ms 215464 KB Output is correct
5 Correct 3973 ms 222064 KB Output is correct
6 Correct 6224 ms 233816 KB Output is correct
7 Correct 5783 ms 233672 KB Output is correct
8 Correct 27 ms 176732 KB Output is correct
9 Correct 28 ms 176732 KB Output is correct
10 Correct 5718 ms 232460 KB Output is correct
11 Correct 1785 ms 222180 KB Output is correct
12 Correct 3728 ms 222100 KB Output is correct

Subtask #5
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3135 ms 174600 KB Output is correct
2 Correct 2963 ms 174516 KB Output is correct
3 Correct 2970 ms 174396 KB Output is correct
4 Correct 2882 ms 174636 KB Output is correct
5 Correct 3077 ms 173372 KB Output is correct
6 Correct 86 ms 169784 KB Output is correct
7 Correct 6513 ms 205724 KB Output is correct
8 Correct 6496 ms 206008 KB Output is correct
9 Correct 2376 ms 181696 KB Output is correct
10 Correct 5505 ms 204116 KB Output is correct
11 Correct 4714 ms 203588 KB Output is correct
12 Correct 5076 ms 201064 KB Output is correct
13 Correct 6644 ms 199852 KB Output is correct

Subtask #6
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3135 ms 174600 KB Output is correct
2 Correct 2963 ms 174516 KB Output is correct
3 Correct 2970 ms 174396 KB Output is correct
4 Correct 2882 ms 174636 KB Output is correct
5 Correct 3077 ms 173372 KB Output is correct
6 Correct 86 ms 169784 KB Output is correct
7 Execution timed out 10030 ms 218028 KB Time limit exceeded
8 Halted 0 ms 0 KB -