제출 #982046

#제출 시각아이디문제언어결과실행 시간메모리
982046shadow_samiIsland Hopping (JOI24_island)C++17
65 / 100
8 ms1568 KiB
#include "island.h" #include<bits/stdc++.h> #include <ext/pb_ds/assoc_container.hpp> #include <ext/pb_ds/tree_policy.hpp> using namespace __gnu_pbds; using namespace std; typedef int ll; typedef vector<ll> vi; typedef vector<vector<ll>> vvi; typedef pair<ll,ll> pi; typedef map<ll,ll> mi; typedef long double ld; typedef vector<ld> vd; typedef vector<vector<ld>> vvd; typedef pair<ld,ld> pd; #define ff first #define ss second #define srt(a) sort(a.begin(),a.end()); #define fip(k, n) for (ll i = k; i < n; i++) #define fjp(k, n) for (ll j = k; j < n; j++) #define fin(k, n) for (ll i = k; i >= n; i--) #define fjn(k, n) for (ll j = k; j >= n; j--) #define fp(k, n, m) for (ll k = n; k < m; k++) #define fn(k, n, m) for (ll k = n; k >= m; k--) #define ordered_set tree<pi, null_type,less< pi >, rb_tree_tag,tree_order_statistics_node_update> #define totalOne(n) __builtin_popcount(n) #define backZero(n) __builtin_ctzll(n) #define frontZero(n) __builtin_clzll(n) #define fx(k) for ( auto x : k ) #define test ll t;cin >> t;while (t--) #define nli "\n" // ==========================(debug)============================================================================================== // #ifndef ONLINE_JUDGE #define debug(x) cerr << #x <<" "; _printn(x); cerr << nli; #else #define debug(x) #endif void _printn(ll x){ cerr<<x<<" "; } // void _printn(int x){ cerr<<x<<" "; } void _printn(ld x){ cerr<<x<<" "; } void _printn(double x){ cerr<<x<<" "; } void _printn(string x){ cerr<<x<<" "; } void _printn(char x){ cerr<<x<<" "; } void _printn(bool x){ cerr<<x<<" "; } template<class T,class V>void _printn(pair<T,V> vv); template<class T> void _printn(vector<T> vv); template<class T> void _printn(set<T> vv); template<class T,class V> void _printn(map<T,V> vv); template<class T> void _printn(multiset<T> vv); template<class T,class V>void _printn(pair<T,V> vv){ cerr<<"( ";_printn(vv.ff);cerr<<",";_printn(vv.ss);cerr<<")";} template<class T> void _printn(vector<T> vv){ cerr<<"[ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"]"; }; template<class T> void _printn(set<T> vv){ cerr<<"{ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"}"; }; template<class T> void _printn(multiset<T> vv){ cerr<<"{ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"}"; }; template<class T,class V> void _printn(map<T,V> vv){ cerr<<"{ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"}"; }; // ==========================(debug)============================================================================================== // ll n,m,tp,tp2,res,cnt,sum,tptp,ans; const ll mx = 300+5; const ll mod = 1e9+7; // ==========================(MOD)=============================================================================================== // // ll mod_add(ll aa,ll bb){ return ((aa%mod)+(bb%mod))%mod; } // ll mod_minus(ll aa,ll bb){ return (((aa%mod)-(bb%mod))+10*mod)%mod; } // ll mod_mul(ll aa,ll bb){ return ((aa%mod)*(bb%mod))%mod; } // ll mod_power(ll aa,ll bb){ aa%=mod; ll empowered = 1; bb%=mod-1; while(bb > 0){ if(bb & 1) empowered = mod_mul(empowered,aa); bb = bb >> 1; aa = mod_mul(aa,aa); } return empowered; } // ll mod_divi(ll aa,ll bb){ aa=mod_mul(aa,mod_power(bb,mod-2)); return aa; } // ==========================(MOD)=============================================================================================== // bool f = false; ll in[mx]; ll dp[mx][mx]; bool mark[mx]; // vi adj2[mx]; // ll dep[mx]; // void dfs(ll u,ll par){ // fx(adj2[u]) // if(x!=par){ // dep[x] = dep[u] + 1; // dfs(x,u); // } // } // int query(ll x,ll y){ // dfs(x,-1); // vector<pi> ls; // fip(1,n+1) // if(i!=x) // ls.push_back({dep[i],i}); // srt(ls); // return ls[y-1].ss; // } // void answer(int x,int y){ // cout<<x<<" "<<y<<nli; // return; // } typedef struct Disjoint_Set_Union{ vi par,sz; ll range; ll src,dest; void init(ll k){ range = k + 10; par.resize(range); sz.resize(range); fip(0,range){ par[i] = i; sz[i] = 1; } return; } ll find(ll k){ return (par[k] == k ? k : par[k] = find(par[k])); } bool unite(ll u,ll v){ src = find(u); dest = find(v); if(src==dest) return 0; if(sz[src]<sz[dest]) swap(src,dest); sz[src] += sz[dest]; par[dest] = src; return 1; } }DSU; DSU dsu; ll get(ll u,ll v){ if(dp[u][v]==-1) dp[u][v] = query(u,v); return dp[u][v]; } void solve(int N, int L) { n = N; if(n==2){ answer(1,2); return; } else if(n==3){ ll in[5][5]; fip(2,4) fjp(1,3){ tp = query(i,j); in[i][j-1] = tp; } if(in[3][0] == 2){ answer(1,2); answer(3,2); }else if(in[2][0]==3){ answer(1,3); answer(3,2); }else{ answer(1,2); answer(1,3); } return; } set<pi> st; dsu.init(n); fip(1,n+1){ fjp(0,n+2) dp[i][j] = -1; in[i] = 0; mark[i] = 0; } set<ll> v; fip(1,n+1) v.insert(i); while(1){ // set<pi> stt; // vi v2; if(dsu.sz[dsu.find(1)]==n){ break; } // debug(v); fx(v){ tp = get(x,in[x]+1); // debug(x); // debug(tp); if(dsu.find(x)!=dsu.find(tp) && get(tp,in[tp]+1)==x){ dsu.unite(x,tp); in[x]++; in[tp]++; st.insert({min(x,tp),max(x,tp)}); } // else{ // v2.push_back(x); // mark[x] = 1; // } } // debug(v2); // debug(stt); // fx(v2) // v.erase(v.find(x)); // fx(stt){ // in[x.ff]++; // in[x.ss]++; // dsu.unite(x.ff,x.ss); // } } fx(st) answer(x.ff,x.ss); return; } // int main(){ // ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0); // #ifndef ONLINE_JUDGE // freopen("input1.txt", "r", stdin); // freopen("output1.txt", "w", stdout); // freopen("error1.txt", "w", stderr); // #endif // ONLINE_JUDGE // int N,L; // cin>>N>>L; // ll sr,de; // fip(0,N-1){ // cin>>sr>>de; // adj2[sr].push_back(de); // adj2[de].push_back(sr); // } // solve(N,L); // // cerr << "Time elapsed: " << setprecision(6) << 1000.0 * clock() / CLOCKS_PER_SEC << "ms\n"; // return 0; // }
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