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Submission #972207

# Submission time Handle Problem Language Result Execution time Memory
972207 2024-04-30T08:40:53 Z RaresFelix The Potion of Great Power (CEOI20_potion) C++17
17 / 100
 3000 ms 75848 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
using ii = pair<int, int>;
using vi = vector<int>;
 
int n, rad;
int *H0, *A0, *B0;
vi Perm;
 

vector<vi> Snapshot;
vector<vi> Mare;
vector<vi> S;
 
void init(int N, int D, int H[]) {
    n = N;
    H0 = H;
    S.resize(n);
    for(int i = 0; i < n; ++i)
        Perm.push_back(i);
    sort(Perm.begin(), Perm.end(), [&](auto a, auto b) {
        return H[a] < H[b];
    });
}

 
void curseChanges(int U, int A[], int B[]) {
    rad = min(U, 2000);
    A0 = A;
    B0 = B;
    auto erase = [&](vi &V, int val) {
        vi Re;
        for(auto &it : V)
            if(it != val) Re.push_back(it);
        return Re;
    };
    vector<int> changed(n, 1);
    for(int nr = 0; nr < U; ++nr) {
        if(nr % rad == 0) {
            vi cur;
            for(int i = 0; i < n; ++i) {
                if(changed[i]) {
                    cur.push_back(Mare.size());
                    Mare.push_back(S[i]);
                    changed[i] = 0;
                } else {
                    cur.push_back(Snapshot.back()[i]);
                }
            }
            Snapshot.push_back(cur);
        }
        int a = A[nr], b = B[nr];
        int ok = 0;
        for(auto it : S[a])
            if(it == b) ok = 1;
        changed[a] = 1;
        changed[b] = 1;
        if(ok)  {
            S[a] = erase(S[a], b);
            S[b] = erase(S[b], a);
        } else {
            S[b].push_back(a);
            S[a].push_back(b);
        }
    }
}
 
const int INF = 1e9;
 
int question(int x, int y, int v) {
    if(!v) {
        return INF;
    }
    --v;
    vi VSX = Mare[Snapshot[v / rad][x]];
    vi VSY = Mare[Snapshot[v / rad][y]];
    set<int> SX, SY;
    for(auto it : VSX) SX.insert(it);
    for(auto it : VSY) SY.insert(it);
    for(int i = v / rad * rad; i <= v; ++i) {
        int a = A0[i], b = B0[i];
        if(b == x) swap(a, b);
        if(a == x) {
            if(SX.count(b)) SX.erase(b);
            else SX.insert(b);
        }
        if(b == y) swap(a, b);
        if(a == y) {
            if(SY.count(b)) SY.erase(b);
            else SY.insert(b);
        }
    }

    vi VA, VB;
    for(auto it : SX)
        VA.push_back(H0[it]);
    for(auto it : SY)
        VB.push_back(H0[it]);
    sort(VA.begin(), VA.end());
    sort(VB.begin(), VB.end());

    int p1 = 0, p2 = 0;
    int re = INF;
    while(p1 < VA.size() && p2 < VB.size()) {
        re = min(re, abs(VB[p2] - VA[p1]));
        if(VA[p1] < VB[p2]) ++p1;
        else ++p2;
    }

    return re;
}

Compilation message

potion.cpp: In function 'int question(int, int, int)':
potion.cpp:106:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  106 |     while(p1 < VA.size() && p2 < VB.size()) {
      |           ~~~^~~~~~~~~~~
potion.cpp:106:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  106 |     while(p1 < VA.size() && p2 < VB.size()) {
      |                             ~~~^~~~~~~~~~~

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 3 ms 344 KB Output is correct
2 Correct 2 ms 344 KB Output is correct
3 Correct 2 ms 344 KB Output is correct
4 Correct 22 ms 8008 KB Output is correct

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 342 ms 73056 KB Output is correct
2 Correct 327 ms 73196 KB Output is correct
3 Correct 645 ms 48344 KB Output is correct
4 Correct 2709 ms 55668 KB Output is correct
5 Correct 676 ms 49072 KB Output is correct
6 Execution timed out 3035 ms 75848 KB Time limit exceeded
7 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 262 ms 73528 KB Output is correct
2 Execution timed out 3016 ms 59644 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 101 ms 2180 KB Output is correct
2 Correct 237 ms 1660 KB Output is correct
3 Correct 1364 ms 1408 KB Output is correct
4 Correct 1859 ms 2172 KB Output is correct
5 Correct 1962 ms 2200 KB Output is correct
6 Correct 241 ms 956 KB Output is correct
7 Execution timed out 3094 ms 1600 KB Time limit exceeded
8 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 3 ms 344 KB Output is correct
3 Correct 2 ms 344 KB Output is correct
4 Correct 2 ms 344 KB Output is correct
5 Correct 22 ms 8008 KB Output is correct
6 Correct 342 ms 73056 KB Output is correct
7 Correct 327 ms 73196 KB Output is correct
8 Correct 645 ms 48344 KB Output is correct
9 Correct 2709 ms 55668 KB Output is correct
10 Correct 676 ms 49072 KB Output is correct
11 Execution timed out 3035 ms 75848 KB Time limit exceeded
12 Halted 0 ms 0 KB -