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Submission #969887

# Submission time Handle Problem Language Result Execution time Memory
969887 2024-04-25T18:18:01 Z RandomUser Pictionary (COCI18_pictionary) C++17
126 / 140
 147 ms 65536 KB 
#include <bits/stdc++.h>
using namespace std;
using pii = pair<int, int>;
const int maxn = 1e5 + 5;

struct DSU {
    int n, par[maxn], size[maxn];

    void config(int _n) {
        n = _n + 1;
        for(int i=1; i<=n; i++) par[i] = i, size[i] = 1;
    }

    int get(int u) {
        if(u == par[u]) return u;
        return par[u] = get(par[u]);
    }

    bool uni(int u, int v) {
        u = get(u), v = get(v);

        if(u == v) return false;
        if(size[u] < size[v]) swap(u, v);

        size[u] += size[v];
        par[v] = u;

        return true;
    }

    bool sameSet(int &u, int &v) { return get(u) == get(v); }

    void reset() {
        for(int i=1; i<=n; i++) par[i] = i, size[i] = 1;
    }
};

int32_t main() {
    int n, m, q;
    cin >> n >> m >> q;

    vector<pii> qus(q);
    for(pii &x : qus) cin >> x.first >> x.second;

    vector<int> L(q, 1), R(q, m), ANS(q, m);
    bool changed = 1;
    stack<int> to_check[m+1];
    DSU dsu; dsu.config(n);

    while(changed) {
        changed = 0;

        for(int i=0; i<q; i++) {
            if(L[i] <= R[i]) {
                to_check[(L[i] + R[i]) / 2].push(i);
                changed = 1;
            }
        }

        int curr = m;
        dsu.reset();
        for(int i=1; i<=m; i++) {
            for(int j=curr; j<=n; j+=curr)
                if(j+curr <= n) dsu.uni(j, j+curr);

            while(!to_check[i].empty()) {
                int id = to_check[i].top();
                to_check[i].pop();
                if(dsu.sameSet(qus[id].first, qus[id].second)) ANS[id] = i, R[id] = i - 1;
                else L[id] = i + 1;
            }

            curr--;
        }
        
    }

    for(int &x : ANS) cout << x << '\n';
    return 0;
}

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 1368 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 1880 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 36 ms 3540 KB Output is correct
2 Correct 37 ms 3152 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 4180 KB Output is correct
2 Correct 46 ms 3668 KB Output is correct

Subtask #5
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 54 ms 17488 KB Output is correct
2 Correct 49 ms 8284 KB Output is correct

Subtask #6
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 61 ms 15388 KB Output is correct
2 Correct 46 ms 3404 KB Output is correct

Subtask #7
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 99 ms 33716 KB Output is correct
2 Correct 70 ms 15904 KB Output is correct

Subtask #8
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 64 ms 3664 KB Output is correct
2 Correct 123 ms 24440 KB Output is correct

Subtask #9
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 147 ms 41296 KB Output is correct
2 Correct 132 ms 18772 KB Output is correct

Subtask #10
0 / 14.0

# Verdict Execution time Memory Grader output
1 Runtime error 76 ms 65536 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -