oj.uz

Submission #1002511

# Submission time Handle Problem Language Result Execution time Memory
1002511 2024-06-19T15:40:38 Z yoav_s The Potion of Great Power (CEOI20_potion) C++17
52 / 100
 3000 ms 261080 KB 
#include <bits/stdc++.h>
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

using namespace std;

typedef int ll;
typedef vector<ll> v;
typedef vector<v> vv;
typedef vector<vv> vvv;
typedef vector<bool> vb;
typedef vector<vb> vvb;
typedef vector<vvb> vvvb;
typedef pair<ll,ll> p;
typedef vector<p> vp;
typedef vector<vp> vvp;
typedef vector<vvp> vvvp;
typedef pair<ll, p> tri;
typedef vector<tri> vtri;
typedef vector<vtri> vvtri;
typedef vector<vvtri> vvvtri;

#define f first
#define s second
#define pb push_back
#define eb emplace_back
#define all(v) (v).begin(),(v).end()

const ll INF = 1e9;
const ll mod = 1e9 + 7;
struct Node
{
    Node *l, *r;
    ll val;
    ll left, right;
    Node()
    {
        l = r = NULL;
        val = left = right = 0;
    }
    Node(ll size, ll offset)
    {
        ll act = pow(2, ceil(log2(size)));
        left = offset; right = offset + act - 1;
        val = 0;
        if (act > 1)
        {
            l = new Node(act / 2, offset);
            r = new Node(act / 2, offset + act / 2);
        }
    }
    Node(ll size) : Node(size, 0) {}
    Node(Node *l, Node *r, ll val, ll left, ll right)
    {
        this->l = l;
        this->r = r;
        this->val = val;
        this->left = left;
        this->right = right;
    }
    Node(Node *l, Node *r)
    {
        this->l = l;
        this->r = r;
        this->val = l->val + r->val;
        this->left = l->left;
        this->right = r->right;
    }
    Node *update(ll index, ll val)
    {
        if (left == right)
        {
            return new Node(NULL, NULL, val, index, index);
        }
        ll mid = (left + right) / 2;
        Node *curL = l, *curR = r;
        if (index <= mid)
        {
            curL = l->update(index, val);
        }
        else
        {
            curR = r->update(index, val);
        }
        return new Node(curL, curR);
    }
    void toList(v &arr)
    {
        if (val == 0) return;
        if (left == right)
        {
            arr.pb(left);
            return;
        }
        l->toList(arr);
        r->toList(arr);
    }
};

ll N;
ll D;
v H;
ll U;
vv sometimesNeighbors;
vp edges;
vector<vector<pair<ll, Node*>>> trees;
vector<map<ll, ll>> neighborShrink;

void init(int gN, int gD, int gH[]) {
    N = gN;
    D = gD;
    for (ll i= 0 ; i < N; i++) H.pb(gH[i]);
}

void curseChanges(int gU, int A[], int B[]) {
    U = gU;
    sometimesNeighbors.resize(N);
    for (ll i = 0; i < U; i++)
    {
        edges.eb(A[i], B[i]);
        sometimesNeighbors[A[i]].pb(B[i]);
        sometimesNeighbors[B[i]].pb(A[i]);
    }
    trees.resize(N);
    vvb areNeighbors(N);
    neighborShrink.resize(N);
    for (ll i = 0; i < N; i++)
    {
        sort(all(sometimesNeighbors[i]));
        sometimesNeighbors[i].erase(unique(all(sometimesNeighbors[i])),sometimesNeighbors[i].end());
        sort(all(sometimesNeighbors[i]),[](ll i, ll j){return H[i] < H[j];});
        for (ll j = 0; j < sometimesNeighbors[i].size(); j++)
        {
            neighborShrink[i][sometimesNeighbors[i][j]] = j;
        }
        trees[i].eb(0, new Node(sometimesNeighbors[i].size()));
        areNeighbors[i].resize(sometimesNeighbors[i].size());
    }
    for (ll iter = 0; iter < U; iter++)
    {
        ll j1 = neighborShrink[edges[iter].f][edges[iter].s];
        ll i1 = edges[iter].f;
        ll i2 = edges[iter].s, j2 = neighborShrink[edges[iter].s][edges[iter].f];
        if (areNeighbors[i1][j1])
        {
            areNeighbors[i1][j1] = false;
            areNeighbors[i2][j2] = false;
            trees[i1].eb(iter + 1, trees[i1].back().s->update(j1, 0));
            trees[i2].eb(iter + 1, trees[i2].back().s->update(j2, 0));
        }
        else
        {
            areNeighbors[i1][j1] = true;
            areNeighbors[i2][j2] = true;
            trees[i1].eb(iter + 1, trees[i1].back().s->update(j1, 1));
            trees[i2].eb(iter + 1, trees[i2].back().s->update(j2, 1));
        }
    }
}

int question(int x, int y, int time) {
    auto cmp = [](pair<ll, Node *> x, pair<ll, Node*> y){return x.f < y.f || (x.f == y.f && y.s == NULL);};
    Node *xNeighbors = (*(upper_bound(all(trees[x]), pair<ll, Node*>(time, NULL), cmp) - 1)).s;
    Node *yNeighbors = (*(upper_bound(all(trees[y]), pair<ll, Node*>(time, NULL), cmp) - 1)).s;
    v xNeighborsArr, yNeighborsArr;
    xNeighbors->toList(xNeighborsArr);
    yNeighbors->toList(yNeighborsArr);
    ll i = 0, j = 0;
    ll mini = INF;
    while (i < xNeighborsArr.size() && j < yNeighborsArr.size())
    {
        ll iHeight = H[sometimesNeighbors[x][xNeighborsArr[i]]];
        while (j < (ll)yNeighborsArr.size() - 1 && H[sometimesNeighbors[y][yNeighborsArr[j + 1]]] <= iHeight) j++;
        mini = min(mini, abs(iHeight - H[sometimesNeighbors[y][yNeighborsArr[j]]]));
        if (j < yNeighborsArr.size() - 1) mini = min(mini, abs(iHeight - H[sometimesNeighbors[y][yNeighborsArr[j + 1]]]));
        i++;
    }
    return mini;
}
/*
int main() {
  int N, D, U, Q;
  std::ios::sync_with_stdio(false); std::cin.tie(NULL);
  std::cin >> N >> D >> U >> Q;

  int *F = new int[N];
  for (int i=0; i<N; i++)
    std::cin >> F[i];
  init(N, D, F);

  int *A = new int[U], *B = new int[U];
  for (int i=0; i<U; i++) {
    std::cin >> A[i] >> B[i];
  }
  curseChanges(U, A, B);

  bool correct = true;
  for (int i=0; i<Q; i++) {
    int X,Y,V,CorrectAnswer;
    std::cin >> X >> Y >> V >> CorrectAnswer;
    int YourAnswer = question(X,Y,V);
    if (YourAnswer != CorrectAnswer) {
      std::cout << "WA! Question: " << i
		<< " (X=" << X << ", Y=" << Y << ", V=" << V << ") "
		<<  "Your answer: " << YourAnswer
                << " Correct Answer: " << CorrectAnswer << std::endl;
      correct = false;
    } else {
      std::cerr << YourAnswer << " - OK" << std::endl;
    }
  }

  if (correct) {
    std::cout << "Correct." << std::endl;
  } else std::cout << "Incorrect." << std::endl;
  return 0;
}
/**/

Compilation message

potion.cpp:218:1: warning: "/*" within comment [-Wcomment]
  218 | /**/
      |  
potion.cpp: In function 'void curseChanges(int, int*, int*)':
potion.cpp:132:26: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  132 |         for (ll j = 0; j < sometimesNeighbors[i].size(); j++)
      |                        ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
potion.cpp: In function 'int question(int, int, int)':
potion.cpp:170:14: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  170 |     while (i < xNeighborsArr.size() && j < yNeighborsArr.size())
      |            ~~^~~~~~~~~~~~~~~~~~~~~~
potion.cpp:170:42: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  170 |     while (i < xNeighborsArr.size() && j < yNeighborsArr.size())
      |                                        ~~^~~~~~~~~~~~~~~~~~~~~~
potion.cpp:175:15: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  175 |         if (j < yNeighborsArr.size() - 1) mini = min(mini, abs(iHeight - H[sometimesNeighbors[y][yNeighborsArr[j + 1]]]));
      |             ~~^~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1112 KB Output is correct
2 Correct 2 ms 1112 KB Output is correct
3 Correct 2 ms 1112 KB Output is correct
4 Correct 22 ms 22744 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 575 ms 167368 KB Output is correct
2 Correct 531 ms 167364 KB Output is correct
3 Correct 232 ms 146636 KB Output is correct
4 Correct 1905 ms 261080 KB Output is correct
5 Correct 915 ms 222788 KB Output is correct
6 Correct 2554 ms 172872 KB Output is correct
7 Correct 693 ms 149292 KB Output is correct

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 512 ms 167400 KB Output is correct
2 Correct 2573 ms 167880 KB Output is correct
3 Correct 1710 ms 164044 KB Output is correct
4 Execution timed out 3004 ms 172896 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 38 ms 8792 KB Output is correct
2 Correct 82 ms 10708 KB Output is correct
3 Correct 106 ms 7768 KB Output is correct
4 Correct 482 ms 10584 KB Output is correct
5 Correct 423 ms 9816 KB Output is correct
6 Correct 99 ms 10328 KB Output is correct
7 Correct 395 ms 8532 KB Output is correct

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 2 ms 1112 KB Output is correct
3 Correct 2 ms 1112 KB Output is correct
4 Correct 2 ms 1112 KB Output is correct
5 Correct 22 ms 22744 KB Output is correct
6 Correct 575 ms 167368 KB Output is correct
7 Correct 531 ms 167364 KB Output is correct
8 Correct 232 ms 146636 KB Output is correct
9 Correct 1905 ms 261080 KB Output is correct
10 Correct 915 ms 222788 KB Output is correct
11 Correct 2554 ms 172872 KB Output is correct
12 Correct 693 ms 149292 KB Output is correct
13 Correct 512 ms 167400 KB Output is correct
14 Correct 2573 ms 167880 KB Output is correct
15 Correct 1710 ms 164044 KB Output is correct
16 Execution timed out 3004 ms 172896 KB Time limit exceeded
17 Halted 0 ms 0 KB -