Submission #83158

#TimeUsernameProblemLanguageResultExecution timeMemory
83158fredbrPictionary (COCI18_pictionary)C++17
42 / 140
1577 ms1524 KiB
#include <bits/stdc++.h> using namespace std; using ii = pair<int, int>; template <int maxn> struct Dsu { int n; int pai[maxn], w[maxn]; int find(int x) { if (x == pai[x]) return x; return pai[x] = find(pai[x]); } bool find(int a, int b) { a = find(a), b= find(b); return a == b; } void join(int a, int b) { a = find(a), b = find(b); if (w[a] < w[b]) swap(a, b); pai[b] = a; w[a] += w[b]; } void init(int n_) { n = n_; fill(w+1, w+n+1, 1); iota(pai+1, pai+n+1, 1); } }; int const maxn = 101010; Dsu<maxn> dsu; int main() { ios::sync_with_stdio(false), cin.tie(0); int n, m; int q; cin >> n >> m >> q; while (q--) { dsu.init(n); int a, b; cin >> a >> b; for (int k = m; k >= 1; k--) { for (int i = k*2; i <= n; i += k) { if (!dsu.find(k, i)) dsu.join(k, i); } if (dsu.find(a, b)) { cout << m-k+1 << "\n"; break; } } } }
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