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답안 #477249

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
477249 2021-10-01T11:56:36 Z hackerbhaiya Regions (IOI09_regions) C++14
100 / 100
 3815 ms 53316 KB 
#include<bits/stdc++.h>
// #pragma GCC optimize("Ofast")
// #pragma GCC target("avx,avx2,fma")
// #pragma GCC optimization("unroll-loops")
// #pragma GCC optimize("unroll-loops")
// #pragma GCC optimize("fast-math")
// #pragma GCC optimize("no-stack-protector")
// #define ll __int128
// #define ll long long
#define ll int
#define f(i,a,b) for(int i=a;i<b;i++)
#define mod 1000000007
// #define mod 998244353 
#define mp make_pair
#define uniq(v) (v).erase(unique(all(v)),(v).end())
#define ff first
#define ss second
#define rf(i,a,b) for(int i=a;i>=b;i--)
#define sc(a) scanf("%lld",&a)
#define pf printf
#define sz(a) (int)(a.size())
#define psf push_front
#define ppf pop_front
#define ppb pop_back
#define pb push_back
#define pq priority_queue
#define all(s) s.begin(),s.end()
#define sp(a) setprecision(a)
#define rz resize
#define ld long double
#define inf (ll)1e18
#define ub upper_bound
#define lb lower_bound
#define bs binary_search
#define eb emplace_back
const double pi = acos(-1);
ll binpow(ll a, ll b){ll res=1;while(b!=0){if(b&1)res*=a;a*=a;b>>=1;}return res;}
// ll binpow(ll a, ll b, ll md){ll res=1;a%=mod;while(b!=0){if(b&1)res*=a,res%=md;a*=a,a%=md;b>>=1;}return res%md;}
 
using namespace std;

const int N=512;
ll n,r,q,tt=1;
vector<vector<ll> > v;
vector<vector<pair<ll,ll> > > reg;
vector<ll> st,en,euler,region;

void dfs(int cur, int par)
{
    st[cur]=tt++,euler.pb(region[cur]);
    f(i,0,sz(v[cur]))
    {
        ll node=v[cur][i];
        if(node!=par)
            dfs(node,cur);
    }
    en[cur]=tt-1;
}

signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    // freopen("xortransform.in","r",stdin);
    // freopen("xortransform.out","w",stdout);
// #ifndef ONLINE_JUDGE
//     freopen("input.txt","r",stdin);
//     freopen("output.txt","w",stdout);
// #endif
    int z=1;
    // cin>>z;
    f(i,1,z+1)
    {
        //cout<<"Case #"<<i<<": ";
        cin>>n>>r>>q;
        v.rz(n+1),st.rz(n+1),en.rz(n+1),reg.rz(r+1),region.rz(n+1);
        cin>>region[1];
        reg[region[1]].pb({1,0});
        f(i,2,n+1)
        {
            ll num;
            cin>>num>>region[i];
            v[i].pb(num),v[num].pb(i),reg[region[i]].pb({i,0});
        }
        euler.pb(0);
        dfs(1,1);
        f(i,1,r+1)
        {
            f(j,0,sz(reg[i]))
                reg[i][j]=mp(st[reg[i][j].ff],en[reg[i][j].ff]);
            sort(all(reg[i]));
        }
        euler.pb(0);
        map<pair<ll,ll>,ll> val;
        f(i,1,r+1)
        {
            if(sz(reg[i])>N)
            {
                vector<ll> tot(tt+2);
                f(j,0,sz(reg[i]))
                    tot[reg[i][j].ff]++,tot[reg[i][j].ss+1]--;
                f(j,1,tt+1)
                {
                    tot[j]+=tot[j-1];
                    val[{i,euler[j]}]+=tot[j];
                }
            }
        }
        while(q--)
        {
            ll r1,r2;
            cin>>r1>>r2;
            if(sz(reg[r1])>N)
                cout<<val[{r1,r2}]<<endl;
            else
            {
                ll ans=0;
                f(i,0,sz(reg[r1]))
                    ans+=(ub(all(reg[r2]),mp(reg[r1][i].ss,inf))-lb(all(reg[r2]),mp(reg[r1][i].ff,-1)));
                cout<<ans<<endl;
            }
        }
    }
}

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 200 KB Output is correct
2 Correct 1 ms 200 KB Output is correct
3 Correct 2 ms 200 KB Output is correct
4 Correct 4 ms 200 KB Output is correct
5 Correct 6 ms 328 KB Output is correct
6 Correct 16 ms 328 KB Output is correct
7 Correct 25 ms 456 KB Output is correct
8 Correct 18 ms 456 KB Output is correct
9 Correct 37 ms 968 KB Output is correct
10 Correct 81 ms 1224 KB Output is correct
11 Correct 114 ms 1644 KB Output is correct
12 Correct 138 ms 2380 KB Output is correct
13 Correct 166 ms 2504 KB Output is correct
14 Correct 182 ms 2988 KB Output is correct
15 Correct 220 ms 6288 KB Output is correct

Subtask #2
85.0 / 85.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1677 ms 7716 KB Output is correct
2 Correct 1807 ms 7460 KB Output is correct
3 Correct 2828 ms 10268 KB Output is correct
4 Correct 253 ms 3144 KB Output is correct
5 Correct 352 ms 5196 KB Output is correct
6 Correct 1205 ms 5216 KB Output is correct
7 Correct 1560 ms 6980 KB Output is correct
8 Correct 1124 ms 13156 KB Output is correct
9 Correct 2114 ms 15176 KB Output is correct
10 Correct 3815 ms 20760 KB Output is correct
11 Correct 3672 ms 18236 KB Output is correct
12 Correct 1203 ms 18856 KB Output is correct
13 Correct 1762 ms 19876 KB Output is correct
14 Correct 2267 ms 42108 KB Output is correct
15 Correct 2957 ms 25576 KB Output is correct
16 Correct 2860 ms 32856 KB Output is correct
17 Correct 3068 ms 53316 KB Output is correct