Submission #978766

#TimeUsernameProblemLanguageResultExecution timeMemory
978766shadow_samiSpring cleaning (CEOI20_cleaning)C++17
100 / 100
489 ms26196 KiB
#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 long long 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 = 1e5+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; vi adj[mx]; ll to[mx]; ll dp[mx]; ll sz[mx]; ll hld[mx]; ll id[mx]; ll up[mx]; bool mark[mx]; ll tnc[mx]; ll timer = 0; typedef struct SEGMENT_TREE{ vi arr,laz; ll range; void prop(ll ptr,ll l,ll r){ if(laz[ptr]){ arr[ptr] = (r-l+1) - arr[ptr]; if(l!=r){ laz[2*ptr] ^= laz[ptr]; laz[2*ptr+1] ^= laz[ptr]; } laz[ptr] = 0; } return; } void init(ll k){ range = 4 * k; arr.resize(range); laz.resize(range); fip(0,range){ arr[i] = 0; laz[i] = 0; } return; } void update(ll ptr,ll l,ll r,ll st,ll en){ prop(ptr,l,r); if(l>en || r<st) return; if(l>=st && r<=en){ laz[ptr] ^= 1; prop(ptr,l,r); return; } ll mid = l + (r-l) / 2; update(2*ptr,l,mid,st,en); update(2*ptr+1,mid+1,r,st,en); arr[ptr] = arr[2*ptr] + arr[2*ptr+1]; return; } ll query(ll ptr,ll l,ll r,ll st,ll en){ prop(ptr,l,r); if(l>en || r<st) return 0; if(l>=st && r<=en){ return arr[ptr]; } ll mid = l + (r-l) / 2; return (query(2*ptr,l,mid,st,en)+query(2*ptr+1,mid+1,r,st,en)); } }SGT; SGT sgt; void dfs(ll u,ll par){ to[u] = par; sz[u] = 1; if(adj[u].size()==1) mark[u] = 1; fx(adj[u]) if(x!=par){ dfs(x,u); sz[u] += sz[x]; } ll pt = -1; ll pt2 = -1; fx(adj[u]) if(x!=par) if(sz[x] > pt){ pt = sz[x]; pt2 = x; } hld[u] = pt2; return; } void dfs2(ll u,ll par,ll k){ id[u] = timer++; up[u] = k; if(hld[u]!=-1) dfs2(hld[u],u,k); fx(adj[u]) if(x!=par && hld[u]!=x){ dfs2(x,u,x); } return; } void ad(ll k){ while(k!=-1){ cnt -= sgt.query(1,0,n-1,id[up[k]],id[k]); sgt.update(1,0,n-1,id[up[k]],id[k]); cnt += sgt.query(1,0,n-1,id[up[k]],id[k]); k = to[up[k]]; } return; } void remov(ll k){ while(k!=-1){ cnt -= sgt.query(1,0,n-1,id[up[k]],id[k]); sgt.update(1,0,n-1,id[up[k]],id[k]); cnt += sgt.query(1,0,n-1,id[up[k]],id[k]); k = to[up[k]]; } 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 cin>>n>>m; ll sr,de; sgt.init(n); fip(0,n-1){ cin>>sr>>de; adj[sr].push_back(de); adj[de].push_back(sr); } fip(1,n+1) if((ll)adj[i].size()>1) tptp = i; dfs(tptp,-1); dfs2(tptp,-1,tptp); cnt = 0; fip(1,n+1) if(mark[i]){ ad(i); } fip(0,m){ cin>>tp; vi v(tp); fip(0,tp)cin>>v[i]; fx(v){ if(mark[x]) tnc[x]++; if(mark[x] && tnc[x]>1) ad(x); else if(!mark[x]) ad(x); } res = sgt.query(1,0,n-1,id[tptp],id[tptp]); if(res) ans = -1; else ans = n + (n-cnt)+tp - 2; cout<<ans<<nli; fx(v){ if(mark[x] && tnc[x]>1) remov(x); else if(!mark[x]) remov(x); if(mark[x]) tnc[x]--; } } cerr << "Time elapsed: " << setprecision(6) << 1000.0 * clock() / CLOCKS_PER_SEC << "ms\n"; return 0; }
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