oj.uz

답안 #1025245

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1025245 2024-07-16T18:16:15 Z NintsiChkhaidze Road Construction (JOI21_road_construction) C++17
6 / 100
 9528 ms 237256 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
using namespace std;
 
const int N = 3e5 + 5,inf = 1e18;
pii t[4][3*N];
int x[N],y[N],yy[N],n,k;
multiset <int> st[4][3*N];
pii arr[N];
vector <int> answ;
 
void upd(int i,int h,int l,int r,int idx,int oldval,int 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);
}
 
pii get(int i,int h,int l,int r,int L,int R){
  if (r < L || R < l) return {-inf,0};
  if (L <= l && r <= R) return t[i][h];
  return max(get(i,left,L,R),get(i,right,L,R));
}
 
int count(int 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,pii> > roll;
 
    int id = arr[i].s,v1 = x[id] + y[id];
    while (tot <= k){
      pii res = get(1,1,1,n,1,yy[id]);
      int 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);
    }
 
    int v2 = x[id] - y[id];
    while (tot <= k){
      pii res = get(2,1,1,n,yy[id] + 1,n);
      int 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,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];
    scanf("%lld%lld",&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);
 
  int l = 0,r = 4e9,res = -1;
  while (l <= r){
    int 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 (int x: answ)
    printf("%d\n",x);
    // cout<<x<<endl;
}

Compilation message

road_construction.cpp: In function 'int main()':
road_construction.cpp:109:17: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  109 |   for (int i=0;i<vec.size();i++){
      |                ~^~~~~~~~~~~
road_construction.cpp:141:14: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
  141 |     printf("%d\n",x);
      |             ~^    ~
      |              |    |
      |              int  long long int
      |             %lld
road_construction.cpp:103:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  103 |     scanf("%lld%lld",&x[i],&y[i]);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2449 ms 174744 KB Output is correct
2 Correct 2440 ms 183780 KB Output is correct
3 Incorrect 2303 ms 174888 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9218 ms 230600 KB Output is correct
2 Correct 9528 ms 225696 KB Output is correct
3 Correct 2794 ms 174552 KB Output is correct
4 Correct 9287 ms 224612 KB Output is correct
5 Correct 8965 ms 226780 KB Output is correct
6 Correct 8694 ms 226152 KB Output is correct
7 Correct 8299 ms 225472 KB Output is correct

Subtask #3
0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6863 ms 237252 KB Output is correct
2 Correct 6730 ms 237256 KB Output is correct
3 Incorrect 51 ms 169724 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6863 ms 237252 KB Output is correct
2 Correct 6730 ms 237256 KB Output is correct
3 Incorrect 51 ms 169724 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2449 ms 174744 KB Output is correct
2 Correct 2440 ms 183780 KB Output is correct
3 Incorrect 2303 ms 174888 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2449 ms 174744 KB Output is correct
2 Correct 2440 ms 183780 KB Output is correct
3 Incorrect 2303 ms 174888 KB Output isn't correct
4 Halted 0 ms 0 KB -