Submission #1076206

#TimeUsernameProblemLanguageResultExecution timeMemory
1076206c2zi6Longest Trip (IOI23_longesttrip)C++17
5 / 100
912 ms664 KiB
#define _USE_MATH_DEFINES #include <bits/stdc++.h> #define ff first #define ss second #define pb push_back #define all(a) (a).begin(), (a).end() #define replr(i, a, b) for (int i = int(a); i <= int(b); ++i) #define reprl(i, a, b) for (int i = int(a); i >= int(b); --i) #define rep(i, n) for (int i = 0; i < int(n); ++i) #define mkp(a, b) make_pair(a, b) using namespace std; typedef long long ll; typedef long double ld; typedef pair<int, int> PII; typedef vector<int> VI; typedef vector<PII> VPI; typedef vector<VI> VVI; typedef vector<VVI> VVVI; typedef vector<VPI> VVPI; typedef pair<ll, ll> PLL; typedef vector<ll> VL; typedef vector<PLL> VPL; typedef vector<VL> VVL; typedef vector<VVL> VVVL; typedef vector<VPL> VVPL; template<class T> T setmax(T& a, T b) {if (a < b) return a = b; return a;} template<class T> T setmin(T& a, T b) {if (a < b) return a; return a = b;} #include <ext/pb_ds/assoc_container.hpp> using namespace __gnu_pbds; template<class T> using indset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>; #include "longesttrip.h" bool samecomp(VI a, VI b) { return !are_connected(a, b); } VI longest_trip(int N, int D) { int n = N; VI group(n, -1); int last = 0; rep(u, n) if (group[u] == -1) { group[u] = last; rep(v, n) if (group[v] == -1) { if (samecomp({u}, {v})) group[v] = last; } last++; } VVI comp(last); rep(u, n) comp[group[u]].pb(u); /*cout << "components" << endl;*/ /*rep(i, last) {*/ /* for (int x : comp[i]) cout << x << " ";*/ /* cout << endl;*/ /*}*/ /*cout << "components" << endl;*/ sort(all(comp), [&](const VI& a, const VI& b){return b.size() > a.size();}); int prev = -1; VI ans; rep(_, 3) { rep(i, last) { assert(comp[i].size() <= 2); if (comp[i].size() && i != prev) { ans.pb(comp[i].back()); comp[i].pop_back(); prev = i; } } } rep(i, last) assert(comp[i].size() == 0); return ans; }
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