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답안 #1025253

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1025253 2024-07-16T18:24:14 Z NintsiChkhaidze Road Construction (JOI21_road_construction) C++17
65 / 100
 10000 ms 229432 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 optimize("Ofast")
// #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 2454 ms 174420 KB Output is correct
2 Correct 2448 ms 174364 KB Output is correct
3 Correct 2433 ms 174540 KB Output is correct
4 Correct 2301 ms 174524 KB Output is correct
5 Correct 2397 ms 173400 KB Output is correct
6 Correct 115 ms 169812 KB Output is correct

Subtask #2
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8273 ms 218572 KB Output is correct
2 Correct 8593 ms 218572 KB Output is correct
3 Correct 2649 ms 174268 KB Output is correct
4 Correct 9183 ms 218452 KB Output is correct
5 Correct 9288 ms 218536 KB Output is correct
6 Correct 8831 ms 218536 KB Output is correct
7 Correct 8359 ms 218284 KB Output is correct

Subtask #3
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6845 ms 229432 KB Output is correct
2 Correct 6429 ms 227216 KB Output is correct
3 Correct 76 ms 169556 KB Output is correct
4 Correct 2394 ms 215244 KB Output is correct
5 Correct 4389 ms 215496 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6845 ms 229432 KB Output is correct
2 Correct 6429 ms 227216 KB Output is correct
3 Correct 76 ms 169556 KB Output is correct
4 Correct 2394 ms 215244 KB Output is correct
5 Correct 4389 ms 215496 KB Output is correct
6 Correct 6854 ms 227208 KB Output is correct
7 Correct 6764 ms 229340 KB Output is correct
8 Correct 47 ms 169552 KB Output is correct
9 Correct 29 ms 176820 KB Output is correct
10 Correct 7065 ms 225852 KB Output is correct
11 Correct 1989 ms 215244 KB Output is correct
12 Correct 4506 ms 215496 KB Output is correct

Subtask #5
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2454 ms 174420 KB Output is correct
2 Correct 2448 ms 174364 KB Output is correct
3 Correct 2433 ms 174540 KB Output is correct
4 Correct 2301 ms 174524 KB Output is correct
5 Correct 2397 ms 173400 KB Output is correct
6 Correct 115 ms 169812 KB Output is correct
7 Correct 8614 ms 198192 KB Output is correct
8 Correct 8486 ms 198448 KB Output is correct
9 Correct 2982 ms 174456 KB Output is correct
10 Correct 6412 ms 196680 KB Output is correct
11 Correct 5716 ms 196276 KB Output is correct
12 Correct 6039 ms 193672 KB Output is correct
13 Correct 7256 ms 192496 KB Output is correct

Subtask #6
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2454 ms 174420 KB Output is correct
2 Correct 2448 ms 174364 KB Output is correct
3 Correct 2433 ms 174540 KB Output is correct
4 Correct 2301 ms 174524 KB Output is correct
5 Correct 2397 ms 173400 KB Output is correct
6 Correct 115 ms 169812 KB Output is correct
7 Correct 8273 ms 218572 KB Output is correct
8 Correct 8593 ms 218572 KB Output is correct
9 Correct 2649 ms 174268 KB Output is correct
10 Correct 9183 ms 218452 KB Output is correct
11 Correct 9288 ms 218536 KB Output is correct
12 Correct 8831 ms 218536 KB Output is correct
13 Correct 8359 ms 218284 KB Output is correct
14 Correct 6845 ms 229432 KB Output is correct
15 Correct 6429 ms 227216 KB Output is correct
16 Correct 76 ms 169556 KB Output is correct
17 Correct 2394 ms 215244 KB Output is correct
18 Correct 4389 ms 215496 KB Output is correct
19 Correct 6854 ms 227208 KB Output is correct
20 Correct 6764 ms 229340 KB Output is correct
21 Correct 47 ms 169552 KB Output is correct
22 Correct 29 ms 176820 KB Output is correct
23 Correct 7065 ms 225852 KB Output is correct
24 Correct 1989 ms 215244 KB Output is correct
25 Correct 4506 ms 215496 KB Output is correct
26 Correct 8614 ms 198192 KB Output is correct
27 Correct 8486 ms 198448 KB Output is correct
28 Correct 2982 ms 174456 KB Output is correct
29 Correct 6412 ms 196680 KB Output is correct
30 Correct 5716 ms 196276 KB Output is correct
31 Correct 6039 ms 193672 KB Output is correct
32 Correct 7256 ms 192496 KB Output is correct
33 Execution timed out 10028 ms 227172 KB Time limit exceeded
34 Halted 0 ms 0 KB -