Submission #1192617

#TimeUsernameProblemLanguageResultExecution timeMemory
1192617shadow_samiJoker (BOI20_joker)C++20
0 / 100
442 ms327680 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)============================================================================================== // #ifdef SAMI #define debug(x) cerr<<#x;cerr<<" ";_printn(x);cerr<<nli; #define debg() cerr<<nli; #else #define debug(x) #define debg() #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 = 2e5+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 from[mx]; ll to[mx]; bool mark[205][mx]; typedef struct Disjoint_Set_Union{ vi par,sz,cos,mark; ll range,rs,src,dest; ll c1,c2; vvi lis; void init(ll k){ k += 5; par.resize(k); sz.resize(k); cos.resize(k); f = 0; fip(0,k){ par[i] = i; sz[i] = 1; cos[i] = 0; } } ll find(ll k){ while(k!=par[k]){ k = par[k]; } return k; } ll get(ll k){ rs = cos[k]; while(k!=par[k]){ k = par[k]; rs ^= cos[k]; } return rs; } bool unite(ll u,ll v){ src = find(u); dest = find(v); c1 = get(u); c2 = get(v); if(src==dest){ if(c1==c2 && !f){ f = 1; lis.push_back({-1}); } return 0; } if(sz[src] < sz[dest]){ swap(c1,c2); swap(src,dest); } lis.push_back({dest,par[dest],cos[dest]}); par[dest] = src; cos[dest] ^= c1^c2^1; sz[src] += sz[dest]; return 1; } void rollback(){ while(lis.size()){ auto it = lis.back(); lis.clear(); if(it[0]==-1) f = 0; else{ sz[par[it[0]]] -= sz[it[0]]; cos[it[0]] = it[2]; par[it[0]] = it[1]; } } return; } void destroy(){ lis.clear(); } }DSU; DSU dsu; int main(){ ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0); mt19937 rng(chrono::steady_clock::now().time_since_epoch().count()); #ifdef SAMI freopen("input1.txt", "r", stdin); freopen("output1.txt", "w", stdout); freopen("error1.txt", "w", stderr); #endif // ONLINE_JUDGE cin>>n>>m>>tptp; fip(0,m) cin>>from[i]>>to[i]; fip(0,min(m,200ll)){ dsu.init(n); fjp(0,i) dsu.unite(from[j],to[j]); fjn(m-1,i){ dsu.unite(from[j],to[j]); mark[i][j-1] = f; } } fip(0,tptp) { cin>>tp>>tp2; tp--,tp2--; cout<<(mark[tp][tp2]?"YES":"NO")<<nli; } cerr << "Time elapsed: " << setprecision(6) << 1000.0 * clock() / CLOCKS_PER_SEC << "ms\n"; return 0; }
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