oj.uz

Submission #555363

# Submission time Handle Problem Language Result Execution time Memory
555363 2022-04-30T15:45:05 Z urosk Mergers (JOI19_mergers) C++14
10 / 100
 3000 ms 262144 KB 
// __builtin_popcount(x)
// __builtin_popcountll(x)
#define here cerr<<"===========================================\n"
#include <bits/stdc++.h>
#define ld double
#define ll int
#define ull unsigned long long
#define llinf 100000000000000000LL // 10^17
#define iinf 2000000000 // 2*10^9
#define pb push_back
#define popb pop_back
#define fi first
#define sc second
#define endl '\n'
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pld pair<ld,ld>
#define sz(a) int(a.size())
#define all(a) a.begin(),a.end()
#define ceri(a,l,r) {for(ll i_ = l;i_<=r;i_++) cerr<<a[i_]<< " ";cerr<<endl;}
using namespace std;

#define maxn 500005
ll n,k;
ll a[maxn];
ll dp[maxn][2];
ll b[maxn];
ll in[maxn];
ll out[maxn];
vector<ll> g[maxn];
vector<ll> v[maxn];
vector<ll> f[maxn];
ll ti = 1;
ll col = -1;
ll con[maxn];
ll dsu[maxn];
ll pari[maxn];
ll root(ll x){
    while(x!=dsu[x]){
        dsu[x] = dsu[dsu[x]];
        x = dsu[x];
    }
    return x;
}
void upd(ll x,ll y){
    x = root(x); y = root(y);
    dsu[x] = y;
}
ll root2(ll x){
    while(x!=con[x]){
        con[x] = con[con[x]];
        x = con[x];
    }
    return x;
}
void upd2(ll x,ll y){
    x = root2(x); y = root2(y);
    con[x] = y;
}
void updg(ll x,ll y){
    upd2(x,y);
    f[x].pb(y);
    f[y].pb(x);
}
vector<vector<ll> > cnt;
set<ll> st[maxn];
set<ll> up[maxn];
ll siz[maxn];
void mrg(set<ll> &a,set<ll> &b){
    set<ll> c = b;
    if(sz(a)<sz(b)){
        swap(a,b);
    }
    for(ll x : b) a.insert(x);
    b = c;
}
void dfs(ll u,ll par){
    st[u].insert(b[u]);
    pari[u] = par;
    for(ll s : g[u]){
        if(s==par) continue;
        dfs(s,u);
        mrg(st[u],st[s]);
    }
    siz[u] = sz(st[u]);
}
void dfs2(ll u,ll par){
    if(u!=par){
        up[u] = up[par];
        up[u].insert(b[par]);
        for(ll s : g[par]){
            if(s==pari[par]) continue;
            if(s==u) continue;
            mrg(up[u],st[s]);
        }
        /*
        here;
        cerr<<"u: "<<u<<" "<<par<<endl;
        for(ll x : st[u]) cerr<<x<< " ";
        cerr<<endl;
        for(ll x : up[u]) cerr<<x<< " ";
        cerr<<endl;
        */
        if(sz(up[u])+siz[u]!=k) upd(par,u);
    }
    for(ll s : g[u]){
        if(s==par) continue;
        dfs2(s,u);
    }
}
ll dis[maxn];
ll getnaj(ll u,ll par){
    ll y = u;
    for(ll s : f[u]){
        if(s==par) continue;
        dis[s] = dis[u] + 1;
        ll e = getnaj(s,u);
        if(dis[e]>dis[y]) y = e;
    }
    return y;
}
ll sizi = 0;
void brisi(ll u,ll par,ll x,vector<ll> w){
    w.pb(u);
    if(u==x){
        for(ll i = 0;i<sz(w)-1;i++){
            upd(w[i],w[i+1]);
        }
        sizi-=(sz(w)-1);
        return;
    }
    for(ll s : f[u]){
        if(s==par) continue;
        brisi(s,u,x,w);
    }
}
bool vis[maxn];
int main(){
	ios_base::sync_with_stdio(false);cerr.tie(0);cout.tie(0);cin.tie(0);
    cin >> n >> k;
    iota(dsu+1,dsu+n+1,1);
    for(ll i = 1;i<=n-1;i++){
        ll x,y; cin >> x >> y;
        g[x].pb(y);
        g[y].pb(x);
    }
    for(ll i = 1;i<=n;i++) cin >> b[i];
    for(ll i = 1;i<=n;i++){
        v[b[i]].pb(i);
    }
    dfs(1,1);
    dfs2(1,1);
    for(ll i = 1;i<=n;i++){
        if(vis[root(i)]) continue;
        vis[root(i)] = 1;
        sizi++;
    }
    iota(con+1,con+n+1,1);
    for(ll i = 1;i<=n;i++){
        ll x = root(i);
        for(ll j : g[i]){
            ll y = root(j);
            if(root2(x)==root2(y)) continue;
            updg(x,y);
        }
    }
    //for(ll i= 1;i<=n;i++) cerr<<root(i)<< " ";
    //cerr<<endl;
    ll ans = 0;
    while(sizi>1){
        /*
        here;
        for(ll i = 1;i<=n;i++){
            if(sz(f[i])==0) continue;
            cerr<<"i: "<<i<<endl;
            for(ll x : f[i]) cerr<<x<< " ";
            cerr<<endl;
        }
        */
        ll poc = 1;
        for(ll i = 1;i<=n;i++) if(sz(f[i])>0) poc = i;
        //cerr<<"poc: "<<poc<<endl;
        fill(dis,dis+n+1,0);
        dis[0] = llinf;
        ll x = getnaj(poc,poc);
        //cerr<<x<<endl;

        fill(dis,dis+n+1,0);
        dis[0] = llinf;
        ll y = getnaj(x,x);
        brisi(x,x,y,{});
        //cerr<<y<<endl;
        for(ll i = 1;i<=n;i++) f[i].clear();
        iota(con+1,con+n+1,1);
        for(ll i = 1;i<=n;i++){
            ll x = root(i);
            for(ll j : g[i]){
                ll y = root(j);
                if(root2(x)==root2(y)) continue;
                updg(x,y);
            }
        }
        ans++;
    }
    cout<<ans<<endl;
	return 0;
}
/*
5 4
1 2
2 3
3 4
3 5
1
2
1
3
4
*/

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:8:15: warning: overflow in conversion from 'long long int' to 'int' changes value from '100000000000000000' to '1569325056' [-Woverflow]
    8 | #define llinf 100000000000000000LL // 10^17
      |               ^~~~~~~~~~~~~~~~~~~~
mergers.cpp:184:18: note: in expansion of macro 'llinf'
  184 |         dis[0] = llinf;
      |                  ^~~~~
mergers.cpp:8:15: warning: overflow in conversion from 'long long int' to 'int' changes value from '100000000000000000' to '1569325056' [-Woverflow]
    8 | #define llinf 100000000000000000LL // 10^17
      |               ^~~~~~~~~~~~~~~~~~~~
mergers.cpp:189:18: note: in expansion of macro 'llinf'
  189 |         dis[0] = llinf;
      |                  ^~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 37 ms 82424 KB Output is correct
2 Correct 38 ms 82592 KB Output is correct
3 Correct 43 ms 82580 KB Output is correct
4 Correct 43 ms 82532 KB Output is correct
5 Correct 37 ms 82464 KB Output is correct
6 Correct 37 ms 82464 KB Output is correct
7 Correct 37 ms 82500 KB Output is correct
8 Correct 37 ms 82500 KB Output is correct
9 Correct 36 ms 82484 KB Output is correct
10 Correct 38 ms 82472 KB Output is correct
11 Correct 38 ms 82532 KB Output is correct
12 Correct 37 ms 82480 KB Output is correct
13 Correct 37 ms 82508 KB Output is correct
14 Correct 39 ms 82564 KB Output is correct
15 Correct 37 ms 82480 KB Output is correct
16 Correct 38 ms 82508 KB Output is correct
17 Correct 37 ms 82456 KB Output is correct
18 Correct 40 ms 82488 KB Output is correct
19 Correct 38 ms 82516 KB Output is correct
20 Correct 39 ms 82644 KB Output is correct
21 Correct 38 ms 82556 KB Output is correct
22 Correct 38 ms 82556 KB Output is correct
23 Correct 38 ms 82536 KB Output is correct
24 Correct 38 ms 82496 KB Output is correct

Subtask #2
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 37 ms 82424 KB Output is correct
2 Correct 38 ms 82592 KB Output is correct
3 Correct 43 ms 82580 KB Output is correct
4 Correct 43 ms 82532 KB Output is correct
5 Correct 37 ms 82464 KB Output is correct
6 Correct 37 ms 82464 KB Output is correct
7 Correct 37 ms 82500 KB Output is correct
8 Correct 37 ms 82500 KB Output is correct
9 Correct 36 ms 82484 KB Output is correct
10 Correct 38 ms 82472 KB Output is correct
11 Correct 38 ms 82532 KB Output is correct
12 Correct 37 ms 82480 KB Output is correct
13 Correct 37 ms 82508 KB Output is correct
14 Correct 39 ms 82564 KB Output is correct
15 Correct 37 ms 82480 KB Output is correct
16 Correct 38 ms 82508 KB Output is correct
17 Correct 37 ms 82456 KB Output is correct
18 Correct 40 ms 82488 KB Output is correct
19 Correct 38 ms 82516 KB Output is correct
20 Correct 39 ms 82644 KB Output is correct
21 Correct 38 ms 82556 KB Output is correct
22 Correct 38 ms 82556 KB Output is correct
23 Correct 38 ms 82536 KB Output is correct
24 Correct 38 ms 82496 KB Output is correct
25 Correct 37 ms 82664 KB Output is correct
26 Runtime error 201 ms 262144 KB Execution killed with signal 9
27 Halted 0 ms 0 KB -

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 37 ms 82424 KB Output is correct
2 Correct 38 ms 82592 KB Output is correct
3 Correct 43 ms 82580 KB Output is correct
4 Correct 43 ms 82532 KB Output is correct
5 Correct 37 ms 82464 KB Output is correct
6 Correct 37 ms 82464 KB Output is correct
7 Correct 37 ms 82500 KB Output is correct
8 Correct 37 ms 82500 KB Output is correct
9 Correct 36 ms 82484 KB Output is correct
10 Correct 38 ms 82472 KB Output is correct
11 Correct 38 ms 82532 KB Output is correct
12 Correct 37 ms 82480 KB Output is correct
13 Correct 37 ms 82508 KB Output is correct
14 Correct 39 ms 82564 KB Output is correct
15 Correct 37 ms 82480 KB Output is correct
16 Correct 38 ms 82508 KB Output is correct
17 Correct 37 ms 82456 KB Output is correct
18 Correct 40 ms 82488 KB Output is correct
19 Correct 38 ms 82516 KB Output is correct
20 Correct 39 ms 82644 KB Output is correct
21 Correct 38 ms 82556 KB Output is correct
22 Correct 38 ms 82556 KB Output is correct
23 Correct 38 ms 82536 KB Output is correct
24 Correct 38 ms 82496 KB Output is correct
25 Correct 40 ms 82560 KB Output is correct
26 Execution timed out 3061 ms 93768 KB Time limit exceeded
27 Halted 0 ms 0 KB -

Subtask #4
0 / 22.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3065 ms 93692 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 37 ms 82424 KB Output is correct
2 Correct 38 ms 82592 KB Output is correct
3 Correct 43 ms 82580 KB Output is correct
4 Correct 43 ms 82532 KB Output is correct
5 Correct 37 ms 82464 KB Output is correct
6 Correct 37 ms 82464 KB Output is correct
7 Correct 37 ms 82500 KB Output is correct
8 Correct 37 ms 82500 KB Output is correct
9 Correct 36 ms 82484 KB Output is correct
10 Correct 38 ms 82472 KB Output is correct
11 Correct 38 ms 82532 KB Output is correct
12 Correct 37 ms 82480 KB Output is correct
13 Correct 37 ms 82508 KB Output is correct
14 Correct 39 ms 82564 KB Output is correct
15 Correct 37 ms 82480 KB Output is correct
16 Correct 38 ms 82508 KB Output is correct
17 Correct 37 ms 82456 KB Output is correct
18 Correct 40 ms 82488 KB Output is correct
19 Correct 38 ms 82516 KB Output is correct
20 Correct 39 ms 82644 KB Output is correct
21 Correct 38 ms 82556 KB Output is correct
22 Correct 38 ms 82556 KB Output is correct
23 Correct 38 ms 82536 KB Output is correct
24 Correct 38 ms 82496 KB Output is correct
25 Correct 37 ms 82664 KB Output is correct
26 Runtime error 201 ms 262144 KB Execution killed with signal 9
27 Halted 0 ms 0 KB -