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Submission #1049845

# Submission time Handle Problem Language Result Execution time Memory
1049845 2024-08-09T05:44:36 Z hotboy2703 Harvest (JOI20_harvest) C++17
100 / 100
 184 ms 91280 KB 
#include<bits/stdc++.h>
using ll = long long;
using namespace std;
#define pll pair <ll,ll>
#define fi first
#define se second
#define MP make_pair
#define sz(a) (ll((a).size()))
#define BIT(mask,i) (((mask) >> (i))&1)
#define MASK(i) (1LL << (i))
const ll MAXN = 2e5+100;
struct BIT{
    vector <ll> val;
    ll n;
    void init(ll N){
        n=N;
        val.resize(n+1);
    }    
    void upd(ll i,ll v){
        for (;i <= n;i += i &-i)val[i]+=v;
    }
    ll get(ll i){
        ll res = 0;
        for (;i > 0;i -= i &-i)res+=val[i];
        return res;
    }
    ll query(ll l,ll r){
        return get(r)-get(l-1);
    }
};
ll n,m,L,C;
ll p[MAXN],dist[MAXN];
bool cycle[MAXN];
ll in[MAXN];
pll c[MAXN];
ll a[MAXN],b[MAXN];
ll out[MAXN],timeDFS;
ll cycle_id[MAXN];
ll sz[MAXN];
BIT s[MAXN];
BIT s2[MAXN];
ll cnt[MAXN];
ll pre[MAXN];
ll dist_root[MAXN];
ll cycle_length[MAXN];
vector <ll> all_md[MAXN];
ll cycle_root[MAXN];
ll ans[MAXN];
ll root[MAXN];
vector <ll> g[MAXN];
void dfs(ll u){
    in[u] = ++timeDFS;
    for (auto v:g[u]){
        dist[v] += dist[u];
        root[v] = root[u];
        dfs(v);
    }
    out[u] = timeDFS;
}
struct query{
    ll t,v,id;
};

int main(){
    ios_base::sync_with_stdio(0);cin.tie(nullptr);
    cin>>n>>m>>L>>C;
    for (ll i = 1;i <= n;i ++)cin>>a[i];
    for (ll i = 1;i <= m;i ++)cin>>b[i];
    for (ll i = 1;i <= n;i ++){
        ll r = a[i] - C;
        ll md = (r % L + L) % L;
        auto tmp = upper_bound(a+1,a+1+n,md)-a;
        tmp--;
        if (tmp==0)tmp=n;
        p[i] = tmp;
        dist[i] = C + (md - a[tmp] + L)%L;
        // cout<<i<<' '<<p[i]<<' '<<dist[i]<<endl;
    }
    for (ll i = 1;i <= n;i ++){
        if (!in[i]){
            ll cur = i;
            vector <ll> all;
            while (!in[cur]){
                all.push_back(cur);
                in[cur] = 1;
                cur = p[cur];
            }
            if (in[cur] == 1){
                for (ll j = 0;j < sz(all);j ++){
                    if (all[j] == cur){
                        for (ll k = j;k < sz(all);k ++){
                            cycle[all[k]] = 1;
                            sz[cur]++;
                            cycle_root[all[k]] = cur;
                            dist_root[all[k]] = cycle_length[cur];
                            cycle_length[cur] += dist[all[k]];
                            cycle_id[all[k]] = k-j+1;
                        }
                        s[cur].init(sz[cur]);
                        for (ll k = 0;k < j;k ++)g[all[k+1]].push_back(all[k]);
                        break;
                    }
                }
            }
            else{
                all.push_back(cur);
                for (ll j = 0;j + 1 < sz(all);j ++){
                    g[all[j+1]].push_back(all[j]);
                }
            }
            for (auto x:all)in[x] = 2;
        }
    }
    for (ll i = 1;i <= n;i ++){
        if (cycle[i]){root[i] = i;dist[i] = 0;dfs(i);}
    }
    // cout<<"SUS "<<dist[n]<<endl;
    for (ll i = 1,ptr = 1;i <= m;i ++){
        while (ptr <= n && a[ptr] <= b[i])ptr++;
        if (ptr==1)c[i].se = n;
        else c[i].se = ptr-1;
        c[i].fi = dist[c[i].se] + (b[i] - a[c[i].se] + L) % L;
        // cout<<c[i].fi<<' '<<c[i].se<<'\n';
    }
    ll q;
    cin>>q;
    vector <query> a1,a2;
    for (ll i = 1;i <= q;i ++){
        ll t,v;
        cin>>v>>t;
        if (cycle[v]){
            a1.push_back({t,v,i});
        }
        else{
            a2.push_back({t,v,i});
        }
    }
    sort(a2.begin(),a2.end(),[](query x,query y){return x.t+dist[x.v] < y.t + dist[y.v];});
    sort(c+1,c+1+m);
    {
        BIT tmp;
        tmp.init(n);
        for (ll i = 0,ptr = 1;i < sz(a2);i ++){
            // cout<<i<<endl;
            while (ptr<=m && c[ptr].fi <= a2[i].t + dist[a2[i].v]){
                tmp.upd(in[c[ptr].se],1);
                ptr++;
            }
            ans[a2[i].id] = tmp.query(in[a2[i].v],out[a2[i].v]);
        }
    }
    vector <pll> rem;
    vector <pll> in_cycle;
    for (ll i = 1;i <= m;i ++){
        // cout<<i<<endl;
        ll r = cycle_root[root[c[i].se]];
        pll tmp = MP(c[i].fi + cycle_length[r] - dist_root[root[c[i].se]],root[c[i].se]);
        // cout<<tmp.fi<<' '<<tmp.se<<'\n';
        in_cycle.push_back(tmp);
        all_md[r].push_back(tmp.fi % cycle_length[r]);
        rem.push_back(MP(c[i].fi-dist_root[tmp.se],tmp.se));
    }
    // return 0;
    for (ll i =1 ;i <= n;i ++){
        if (i == cycle_root[i]){
            sort(all_md[i].begin(),all_md[i].end());
            all_md[i].resize(unique(all_md[i].begin(),all_md[i].end())-all_md[i].begin());
            s2[i].init(sz(all_md[i]));
        }
    }
    sort(rem.begin(),rem.end());
    sort(in_cycle.begin(),in_cycle.end());
    sort(a1.begin(),a1.end(),[](query x,query y){return x.t - dist_root[x.v] < y.t - dist_root[y.v];});
    // for (ll i = 1;i <= n;i ++){
    //     cout<<i<<' '<<cycle[i]<<' '<<cycle_root[i]<<endl;
    // }
    for (ll i = 0,ptr = 0,ptr2 = 0;i < sz(a1);i ++){
        // cout<<i<<endl;
        while (ptr < sz(rem) && rem[ptr].fi <= a1[i].t - dist_root[a1[i].v]){
            // cout<<rem[ptr].se<<' '<<ptr<<endl;
            s[cycle_root[rem[ptr].se]].upd(cycle_id[rem[ptr].se],1);
            ptr++;
        }
        while (ptr2 < sz(in_cycle) && in_cycle[ptr2].fi <= a1[i].t-dist_root[a1[i].v]){
            ll r = cycle_root[in_cycle[ptr2].se];
            cnt[r]++;
            pre[r] -= in_cycle[ptr2].fi / cycle_length[r];
            s2[r].upd(lower_bound(all_md[r].begin(),all_md[r].end(),in_cycle[ptr2].fi%cycle_length[r]) - all_md[r].begin() + 1, +1);
            ptr2++;
        }
        ll r = cycle_root[a1[i].v];
        // cout<<i<<' '<<a1[i].v<<' '<<r<<' '<<cycle_length[r]<<' '<<sz(s[r].val)<<' '<<pre[r]<<endl;
        ll res = (a1[i].t-dist_root[a1[i].v]) / cycle_length[r] * cnt[r] + pre[r]
                +s2[r].get(upper_bound(all_md[r].begin(),all_md[r].end(),(a1[i].t-dist_root[a1[i].v]) % cycle_length[r])-all_md[r].begin())
                +s[r].get(cycle_id[a1[i].v]);
        ans[a1[i].id] = res;
    }
    for (ll i = 1;i <= q;i ++)cout<<ans[i]<<'\n';
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 41816 KB Output is correct
2 Correct 7 ms 42076 KB Output is correct
3 Correct 6 ms 42076 KB Output is correct
4 Correct 6 ms 40028 KB Output is correct
5 Correct 6 ms 40284 KB Output is correct
6 Correct 6 ms 40284 KB Output is correct
7 Correct 6 ms 40284 KB Output is correct
8 Correct 7 ms 39864 KB Output is correct
9 Correct 6 ms 39880 KB Output is correct
10 Correct 7 ms 39952 KB Output is correct
11 Correct 6 ms 39976 KB Output is correct
12 Correct 6 ms 40028 KB Output is correct
13 Correct 7 ms 40028 KB Output is correct
14 Correct 8 ms 42164 KB Output is correct
15 Correct 7 ms 40028 KB Output is correct
16 Correct 6 ms 40044 KB Output is correct
17 Correct 6 ms 40132 KB Output is correct
18 Correct 8 ms 40028 KB Output is correct
19 Correct 6 ms 40216 KB Output is correct
20 Correct 6 ms 40024 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 69 ms 54964 KB Output is correct
2 Correct 106 ms 62912 KB Output is correct
3 Correct 113 ms 71732 KB Output is correct
4 Correct 119 ms 74420 KB Output is correct
5 Correct 99 ms 73672 KB Output is correct
6 Correct 104 ms 74524 KB Output is correct
7 Correct 93 ms 58812 KB Output is correct
8 Correct 88 ms 60672 KB Output is correct
9 Correct 104 ms 66024 KB Output is correct
10 Correct 82 ms 65768 KB Output is correct
11 Correct 102 ms 64672 KB Output is correct
12 Correct 108 ms 64372 KB Output is correct
13 Correct 105 ms 64528 KB Output is correct
14 Correct 83 ms 65004 KB Output is correct
15 Correct 102 ms 64952 KB Output is correct
16 Correct 94 ms 65788 KB Output is correct
17 Correct 95 ms 67636 KB Output is correct
18 Correct 68 ms 54128 KB Output is correct
19 Correct 67 ms 55756 KB Output is correct
20 Correct 91 ms 61040 KB Output is correct

Subtask #3
75.0 / 75.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 41816 KB Output is correct
2 Correct 7 ms 42076 KB Output is correct
3 Correct 6 ms 42076 KB Output is correct
4 Correct 6 ms 40028 KB Output is correct
5 Correct 6 ms 40284 KB Output is correct
6 Correct 6 ms 40284 KB Output is correct
7 Correct 6 ms 40284 KB Output is correct
8 Correct 7 ms 39864 KB Output is correct
9 Correct 6 ms 39880 KB Output is correct
10 Correct 7 ms 39952 KB Output is correct
11 Correct 6 ms 39976 KB Output is correct
12 Correct 6 ms 40028 KB Output is correct
13 Correct 7 ms 40028 KB Output is correct
14 Correct 8 ms 42164 KB Output is correct
15 Correct 7 ms 40028 KB Output is correct
16 Correct 6 ms 40044 KB Output is correct
17 Correct 6 ms 40132 KB Output is correct
18 Correct 8 ms 40028 KB Output is correct
19 Correct 6 ms 40216 KB Output is correct
20 Correct 6 ms 40024 KB Output is correct
21 Correct 69 ms 54964 KB Output is correct
22 Correct 106 ms 62912 KB Output is correct
23 Correct 113 ms 71732 KB Output is correct
24 Correct 119 ms 74420 KB Output is correct
25 Correct 99 ms 73672 KB Output is correct
26 Correct 104 ms 74524 KB Output is correct
27 Correct 93 ms 58812 KB Output is correct
28 Correct 88 ms 60672 KB Output is correct
29 Correct 104 ms 66024 KB Output is correct
30 Correct 82 ms 65768 KB Output is correct
31 Correct 102 ms 64672 KB Output is correct
32 Correct 108 ms 64372 KB Output is correct
33 Correct 105 ms 64528 KB Output is correct
34 Correct 83 ms 65004 KB Output is correct
35 Correct 102 ms 64952 KB Output is correct
36 Correct 94 ms 65788 KB Output is correct
37 Correct 95 ms 67636 KB Output is correct
38 Correct 68 ms 54128 KB Output is correct
39 Correct 67 ms 55756 KB Output is correct
40 Correct 91 ms 61040 KB Output is correct
41 Correct 148 ms 77324 KB Output is correct
42 Correct 143 ms 85172 KB Output is correct
43 Correct 87 ms 70356 KB Output is correct
44 Correct 127 ms 87728 KB Output is correct
45 Correct 118 ms 86996 KB Output is correct
46 Correct 117 ms 87364 KB Output is correct
47 Correct 119 ms 89640 KB Output is correct
48 Correct 114 ms 88464 KB Output is correct
49 Correct 111 ms 91280 KB Output is correct
50 Correct 109 ms 73148 KB Output is correct
51 Correct 113 ms 72376 KB Output is correct
52 Correct 163 ms 78320 KB Output is correct
53 Correct 163 ms 80356 KB Output is correct
54 Correct 165 ms 78192 KB Output is correct
55 Correct 166 ms 79092 KB Output is correct
56 Correct 132 ms 82592 KB Output is correct
57 Correct 115 ms 82272 KB Output is correct
58 Correct 126 ms 84968 KB Output is correct
59 Correct 115 ms 84652 KB Output is correct
60 Correct 111 ms 85408 KB Output is correct
61 Correct 116 ms 86168 KB Output is correct
62 Correct 184 ms 80876 KB Output is correct
63 Correct 101 ms 70252 KB Output is correct
64 Correct 97 ms 70120 KB Output is correct
65 Correct 99 ms 68716 KB Output is correct
66 Correct 105 ms 71412 KB Output is correct
67 Correct 97 ms 69728 KB Output is correct
68 Correct 107 ms 70808 KB Output is correct
69 Correct 153 ms 78776 KB Output is correct
70 Correct 137 ms 76212 KB Output is correct
71 Correct 147 ms 78520 KB Output is correct
72 Correct 138 ms 76732 KB Output is correct