Submission #257810

#	Time	Username	Problem	Language	Result	Execution time	Memory
257810		leaked	Praktični (COCI18_prakticni)	C++14	130 / 130	130 ms	23028 KiB

parkticni

#include<bits/stdc++.h>
using namespace std;
//#include<ext/pb_ds/assoc_container.hpp>
//#include<ext/pb_ds/tree_policy.hpp>
//
//    #pragma GCC optimize("unroll-loops")
//    #pragma GCC optimize("Ofast")
//    #pragma GCC optimize("-O3")
//    #pragma GCC optimize("no-stack-protector")
//    #pragma GCC optimize("fast-math")
//#pragma GCC optimize("Ofast")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx")
//#define LOCAL
#define sim template < class c
#define ris return * this
#define dor > debug & operator <<
#define eni(x) sim > typename \
  enable_if<sizeof dud<c>(0) x 1, debug&>::type operator<<(c i) {
sim > struct rge { c b, e; };
sim > rge<c> range(c i, c j) { return rge<c>{i, j}; }
sim > auto dud(c* x) -> decltype(cerr << *x, 0);
sim > char dud(...);
struct debug {
#ifndef LOCAL
~debug() { cerr << endl; }
eni(!=) cerr << boolalpha << i; ris; }
eni(==) ris << range(begin(i), end(i)); }
sim, class b dor(pair < b, c > d) {
  ris << "(" << d.first << ", " << d.second << ")";
}
sim dor(rge<c> d) {
  *this << "[";
  for (auto it = d.b; it != d.e; ++it)
	*this << ", " + 2 * (it == d.b) << *it;
  ris << "]";
}
#else
sim dor(const c&) { ris; }
#endif
};
#define imie(...) " [" << #__VA_ARGS__ ": " << (__VA_ARGS__) << "] "
#define fi first
#define f first
#define se second
#define s second
#define vi_a vector<int>a;
#define p_b push_back
////////////////////////////////???????????????CHECK THIS OUT???????????????//////////////////////////////
#define ll long long
typedef unsigned long long ull;
////////////////////////////////???????????????CHECK THIS OUT???????????????//////////////////////////////
#define ld long double
#define pll pair<ll,ll>
#define pii pair<int,int>
#define m_p make_pair
#define fast_io cin.tie(0);cout.tie(0);ios_base::sync_with_stdio(0);
#define all(x) x.begin(),x.end()
#define getfiles    ifstream cin("input.txt");ofstream cout("output.txt");
#define pw(x) (1ll << x)
#define sz(x) (int)x.size()
#define endl "\n"
#define rall(x) x.rbegin(),x.rend()
#define len(a) (ll)a.size()
#define rep(x,l,r) for(ll x=l;x<r;x++)

//using namespace __gnu_pbds;
ld eps = (ld)1 / 1e6;
const ld pi=3.14159265359;
ll inf = 1e18,mod1=1e9+7;
ll sqr(ll a) { return a * a; }
ll qb(ll a) { return a * a * a; }
void umin(int &a,int b){a=min(a,b);}
void umax(int &a,int b){a=max(a,b);}
bool is_prime(ll val){for(ll i=2;i<=sqrt(val);i++)if(val%i==0)return 0; return 1;}
ll gcd(ll a, ll b) { return !a ? b : gcd(b % a, a); }
ll binpow(ll a, ll b, ll mod) { return b ? (b % 2 ? (a * (sqr(binpow(a, b / 2, mod)) % mod)) % mod : sqr(binpow(a, b / 2, mod)) % mod) : 1; }
ll binmult(ll a, ll b, ll mod) { return b ? (b % 2 ? (2 * binmult(a, b / 2, mod) + a) % mod : (2 * binmult(a, b / 2, mod)) % mod) : 0; }
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
const ll tx[4]={0,1,-1,1};
const ll ty[4]={-1,0,1,1};
const char rev_to[4]={'E','W','N','S'};
const int M=1e9;
const int N=2e5+2;
const int ppp=73;
const int lg=19;
const int OPEN=1;
const int CLOSE=0;
//typedef tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update> st;
auto rnd=bind(uniform_int_distribution<ll>(1,N),mt19937(time(0)));
void bad(){
    cout<<"NE";
    exit(0);
}
vector<pii>g[N];
int n,m;
vector<pair<int,pii>>edges;
int v,u,x;
int p[N],s[N];
void init(){iota(p,p+N,0);fill(s,s+N,1);}
int dad(int v) {if(v==p[v]) return v; return p[v]=dad(p[v]);}
bool mg(int a,int b){
    int ra=dad(a),rb=dad(b);
    if(ra==rb) return 0;
    if(s[ra]<s[rb])swap(ra,rb);
    p[rb]=ra;s[ra]+=s[rb];
    return 1;
}
const int K=32;
int basis[K];
vector<int>lol[N];
int wh[N],inv[N];
int sz;
void add(int msk,int nmb){
    for(int i=0;i<K;i++){
        if(!(pw(i) &msk)) continue;
        if(!basis[i]){
            basis[i]=msk;
            wh[sz]=i;inv[i]=sz;
            sz++;
            return;
        }
        msk^=basis[i];
    }
}
void to_conclude(int val,int nmb){
    for(int i=0;i<K;i++){
        if(!(pw(i) &val)) continue;
        lol[inv[i]].p_b(nmb);
        val^=basis[i];
    }
}
int xr[N];
int V[N],U[N],X[N];
void dfs(int v,int xx,int p){
    xr[v]=xx;
    for(auto &z : g[v]){
        if(z.f==p) continue;
        dfs(z.f,z.s^xx,v);
    }
}
signed main()
{
//    freopen("in.txt","r",stdin);
    fast_io;
    cin>>n>>m;
    init();
    vector<int>nd;
    for(int i=0;i<m;i++){
        cin>>V[i]>>U[i]>>X[i];V[i]--;U[i]--;
        int x1=dad(V[i]),x2=dad(U[i]);
        if(x1==x2){
            nd.p_b(i);
        }else {
            mg(x1,x2);
            g[V[i]].p_b({U[i],X[i]});
            g[U[i]].p_b({V[i],X[i]});
        }
    }
    dfs(0,0,0);
    int  cnt=0;
    for(auto &z : nd){
        int lulw=xr[V[z]]^xr[U[z]]^X[z];
        if(!lulw) continue;
        add(lulw,z);
        cnt++;
    }
    if(!cnt) cout<<0;
    else{
        cout<<sz<<endl;
        for(auto &z : nd){
            int lulw=xr[V[z]]^xr[U[z]]^X[z];
            if(!lulw) continue;
            to_conclude(lulw,z);
        }
        for(int i=0;i<sz;i++){
            cout<<basis[wh[i]]<<' ';
            cout<<sz(lol[i])<<' ';
            for(auto &z : lol[i]) cout<<z+1<<' ';
            cout<<endl;
        }
    }
    return 0;
}
/*

*/

• Subtask 1: 13 / 13
• Subtask 2: 13 / 13
• Subtask 3: 13 / 13
• Subtask 4: 13 / 13
• Subtask 5: 13 / 13
• Subtask 6: 13 / 13
• Subtask 7: 13 / 13
• Subtask 8: 13 / 13
• Subtask 9: 13 / 13
• Subtask 10: 13 / 13