Submission #303834

#TimeUsernameProblemLanguageResultExecution timeMemory
303834shivensinha4Planinarenje (COCI18_planinarenje)C++17
160 / 160
468 ms1184 KiB
#pragma GCC target ("avx2") #pragma GCC optimization ("O3") #pragma GCC optimization ("unroll-loops") #include <bits/stdc++.h> using namespace std; #define for_(i, s, e) for (int i = s; i < (int) e; i++) #define for__(i, s, e) for (ll i = s; i < e; i++) typedef long long ll; typedef vector<int> vi; typedef pair<int, int> ii; #define endl '\n' vector<vi> adj; vi match; bool augmentingPath(int l, int r) { // l and r are the number of nodes on left and right side. // It will be assumed that nodes 0 -> l-1 are the ones on the left side and rest l -> l+r-1 on the right vi pre(l+r, -1); int end = -1; queue<int> q; for_(i, 0, l) if (match[i] == -1) { q.push(i); pre[i] = i; } while (q.size() and end == -1) { int p = q.front(); q.pop(); bool right = p >= l; for (int i: adj[p]) if (pre[i] == -1 and match[i] != -2 and ((match[p] == i) == right)) { assert((i < l) ^ (p < l)); pre[i] = p; // found an unmatched edge on the right side if (match[i] == -1) { end = i; break; } q.push(i); } } if (end == -1) return false; // couln't find augmenting path // update the matching to include the flipped edges in the augmenting path int p = end; while (true) { if (pre[p] == p) break; match[p] = pre[p]; match[pre[p]] = p; p = pre[pre[p]]; } return 1; } int main() { #ifdef shiven freopen("test.in", "r", stdin); #endif ios_base::sync_with_stdio(false); cin.tie(0); int n, m; cin >> n >> m; adj.resize(2*n); match.resize(2*n, -1); for_(i, 0, m) { int a, b; cin >> a >> b; a -= 1; b += n-1; adj[a].push_back(b); adj[b].push_back(a); } int full = 0; while (true) { int v = augmentingPath(n, n); if (!v) break; full += v; } for_(i, 0, n) { bool first = true; if (match[i] == -1) first = false; else { vi prev = match; match[match[i]] = -1; match[i] = -2; if (augmentingPath(n, n)) first = false; match[i] = -1; swap(match, prev); } cout << (first ? "Slavko" : "Mirko") << endl; } return 0; }

Compilation message (stderr)

planinarenje.cpp:2: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
    2 | #pragma GCC optimization ("O3")
      | 
planinarenje.cpp:3: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
    3 | #pragma GCC optimization ("unroll-loops")
      |
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