oj.uz

Submission #729970

# Submission time Handle Problem Language Result Execution time Memory
729970 2023-04-25T01:19:22 Z MtSaka Bridges (APIO19_bridges) C++17
100 / 100
 2417 ms 6960 KB 
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include<bits/stdc++.h>
#define overload(a,b,c,d,...) d
#define rep1(a) for(ll _=0;_<(ll)a;++_)
#define rep2(i,a) for(ll i=0;i<(ll)a;++i)
#define rep3(i,a,b) for(ll i=a;i<(ll)b;++i)
#define rep(...) overload(__VA_ARGS__,rep3,rep2,rep1)(__VA_ARGS__)
#define rrep1(i,a) for(ll i=(ll)a-1;i>=0;--i)
#define rrep2(i,a,b) for(ll i=(ll)b-1;i>=(ll)a;--i)
#define rrep(...) overload(__VA_ARGS__,rrep2,rrep1)(__VA_ARGS__)
#define all(a) a.begin(),a.end()
#define lb(v,x) lower_bound(all(v),x);
#define ub(v,x) upper_bound(all(v),x);
using namespace std;
using ll=long long;
using ull=unsigned long long;
using ld=long double;
template<typename T,typename U>
inline bool chmin(T&a,const U&b){return (a>b?a=b,true:false);}
template<typename T,typename U>
inline bool chmax(T&a,const U&b){return (a<b?a=b,true:false);}
struct dsu{
    private:
    vector<int>p;
    vector<pair<int,int>>history;
    public:
    dsu(int n):p(n,-1){}
    int root(int x){return (p[x]<0?x:root(p[x]));}
    int size(int a){return -p[root(a)];}
    void merge(int u,int v){
        u=root(u),v=root(v);
        if(u==v)return ;
        if(p[u]>p[v])swap(u,v);
        history.emplace_back(v,p[v]);
        p[u]+=p[v];
        p[v]=u;
    }
    void snapshot(){history.clear();}
    void rollback(){
        while(history.size()){
            auto [u,sz]=history.back();history.pop_back();
            p[p[u]]-=sz;
            p[u]=sz;
        }
    }
};
struct edge{
    int u,v,w;
};
struct query{
    int t,x,w,idx;
};
int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int n,m;cin>>n>>m;
    vector<edge>es(m);
    rep(i,m){
        int u,v,w;cin>>u>>v>>w;u--,v--;
        es[i]=edge{u,v,w};
    }
    int q;cin>>q;
    vector<query>qs(q);
    vector<int>ans(q);
    rep(i,q){
        cin>>qs[i].t>>qs[i].x>>qs[i].w;
        qs[i].idx=i;
        qs[i].x--;
    }
    constexpr int B=600;
    for(int l=0;l<q;l+=B){
        const int r=min(q,l+B);
        const int sz=r-l;
        vector<bool>changed(m,false);
        vector<query>qu;
        rep(i,l,r){
            if(qs[i].t==1)changed[qs[i].x]=1;
            else qu.emplace_back(qs[i]);
        }
        vector<edge>pre;
        vector<int>chg;
        rep(i,m){
            //cerr<<changed[i]<<" ";
            if(changed[i])chg.push_back(i);
            else pre.push_back(es[i]);
        }//cerr<<endl;
        sort(all(pre),[](const auto&l,const auto&r){
            return l.w<r.w;
        });
        sort(all(qu),[](const auto&l,const auto&r){
            return l.w>r.w;
        });
        vector<vector<int>>merge(sz);
        rep(i,l,r){
            if(qs[i].t==1)es[qs[i].x].w=qs[i].w;
            else for(auto j:chg)if(es[j].w>=qs[i].w)merge[i-l].emplace_back(j);
        }
        dsu d(n);
        for(auto [t,x,w,idx]:qu){
            //cerr<<t<<" "<<x<<" "<<w<<" "<<idx<<endl;
            while(!pre.empty()&&pre.back().w>=w){
                //cerr<<pre.back().u<<" "<<pre.back().v<<" "<<pre.back().w<<endl;
                d.merge(pre.back().u,pre.back().v);
                pre.pop_back();
            }
            d.snapshot();
            //cerr<<1<<endl;
            for(auto j:merge[idx-l]){
                //cerr<<es[j].u<<" "<<es[j].v<<endl;
                d.merge(es[j].u,es[j].v);
            }
            ans[idx]=d.size(x);
            d.rollback();
        }
    }
    rep(i,q)if(qs[i].t==2)cout<<ans[i]<<"\n";
}

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 21 ms 796 KB Output is correct
4 Correct 5 ms 524 KB Output is correct
5 Correct 10 ms 664 KB Output is correct
6 Correct 9 ms 596 KB Output is correct
7 Correct 12 ms 596 KB Output is correct
8 Correct 13 ms 636 KB Output is correct
9 Correct 14 ms 724 KB Output is correct
10 Correct 13 ms 656 KB Output is correct
11 Correct 13 ms 560 KB Output is correct
12 Correct 16 ms 596 KB Output is correct
13 Correct 18 ms 692 KB Output is correct
14 Correct 17 ms 596 KB Output is correct
15 Correct 15 ms 668 KB Output is correct
16 Correct 12 ms 596 KB Output is correct
17 Correct 13 ms 596 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1264 ms 4648 KB Output is correct
2 Correct 1268 ms 4584 KB Output is correct
3 Correct 1315 ms 4600 KB Output is correct
4 Correct 1312 ms 4712 KB Output is correct
5 Correct 1262 ms 4840 KB Output is correct
6 Correct 1779 ms 5328 KB Output is correct
7 Correct 1740 ms 5500 KB Output is correct
8 Correct 1737 ms 5276 KB Output is correct
9 Correct 31 ms 2412 KB Output is correct
10 Correct 958 ms 5096 KB Output is correct
11 Correct 941 ms 4860 KB Output is correct
12 Correct 1250 ms 5408 KB Output is correct
13 Correct 1291 ms 5096 KB Output is correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 960 ms 3816 KB Output is correct
2 Correct 623 ms 3184 KB Output is correct
3 Correct 1157 ms 3992 KB Output is correct
4 Correct 1024 ms 3828 KB Output is correct
5 Correct 35 ms 2508 KB Output is correct
6 Correct 1113 ms 3924 KB Output is correct
7 Correct 956 ms 3848 KB Output is correct
8 Correct 863 ms 3820 KB Output is correct
9 Correct 742 ms 4092 KB Output is correct
10 Correct 770 ms 3908 KB Output is correct
11 Correct 805 ms 3640 KB Output is correct
12 Correct 713 ms 3576 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2169 ms 6400 KB Output is correct
2 Correct 31 ms 2516 KB Output is correct
3 Correct 208 ms 4444 KB Output is correct
4 Correct 106 ms 4448 KB Output is correct
5 Correct 1273 ms 6340 KB Output is correct
6 Correct 2008 ms 6320 KB Output is correct
7 Correct 1249 ms 6380 KB Output is correct
8 Correct 951 ms 4460 KB Output is correct
9 Correct 930 ms 4400 KB Output is correct
10 Correct 995 ms 5008 KB Output is correct
11 Correct 1589 ms 5804 KB Output is correct
12 Correct 1607 ms 5860 KB Output is correct
13 Correct 1633 ms 5800 KB Output is correct
14 Correct 1112 ms 6304 KB Output is correct
15 Correct 1171 ms 6464 KB Output is correct
16 Correct 2172 ms 6316 KB Output is correct
17 Correct 2121 ms 6376 KB Output is correct
18 Correct 1978 ms 6228 KB Output is correct
19 Correct 1978 ms 6484 KB Output is correct
20 Correct 1716 ms 5924 KB Output is correct
21 Correct 1837 ms 5936 KB Output is correct
22 Correct 2049 ms 6480 KB Output is correct
23 Correct 1228 ms 5920 KB Output is correct

Subtask #5
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1264 ms 4648 KB Output is correct
2 Correct 1268 ms 4584 KB Output is correct
3 Correct 1315 ms 4600 KB Output is correct
4 Correct 1312 ms 4712 KB Output is correct
5 Correct 1262 ms 4840 KB Output is correct
6 Correct 1779 ms 5328 KB Output is correct
7 Correct 1740 ms 5500 KB Output is correct
8 Correct 1737 ms 5276 KB Output is correct
9 Correct 31 ms 2412 KB Output is correct
10 Correct 958 ms 5096 KB Output is correct
11 Correct 941 ms 4860 KB Output is correct
12 Correct 1250 ms 5408 KB Output is correct
13 Correct 1291 ms 5096 KB Output is correct
14 Correct 960 ms 3816 KB Output is correct
15 Correct 623 ms 3184 KB Output is correct
16 Correct 1157 ms 3992 KB Output is correct
17 Correct 1024 ms 3828 KB Output is correct
18 Correct 35 ms 2508 KB Output is correct
19 Correct 1113 ms 3924 KB Output is correct
20 Correct 956 ms 3848 KB Output is correct
21 Correct 863 ms 3820 KB Output is correct
22 Correct 742 ms 4092 KB Output is correct
23 Correct 770 ms 3908 KB Output is correct
24 Correct 805 ms 3640 KB Output is correct
25 Correct 713 ms 3576 KB Output is correct
26 Correct 1260 ms 4724 KB Output is correct
27 Correct 1609 ms 4812 KB Output is correct
28 Correct 1450 ms 4644 KB Output is correct
29 Correct 1086 ms 4544 KB Output is correct
30 Correct 1503 ms 4668 KB Output is correct
31 Correct 1432 ms 4668 KB Output is correct
32 Correct 1501 ms 4872 KB Output is correct
33 Correct 1392 ms 4528 KB Output is correct
34 Correct 1379 ms 4608 KB Output is correct
35 Correct 1370 ms 4608 KB Output is correct
36 Correct 1100 ms 4396 KB Output is correct
37 Correct 1112 ms 4492 KB Output is correct
38 Correct 1129 ms 4380 KB Output is correct
39 Correct 1033 ms 4572 KB Output is correct
40 Correct 967 ms 4484 KB Output is correct
41 Correct 1029 ms 4388 KB Output is correct
42 Correct 1040 ms 4520 KB Output is correct
43 Correct 998 ms 4388 KB Output is correct
44 Correct 1010 ms 4304 KB Output is correct

Subtask #6
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 21 ms 796 KB Output is correct
4 Correct 5 ms 524 KB Output is correct
5 Correct 10 ms 664 KB Output is correct
6 Correct 9 ms 596 KB Output is correct
7 Correct 12 ms 596 KB Output is correct
8 Correct 13 ms 636 KB Output is correct
9 Correct 14 ms 724 KB Output is correct
10 Correct 13 ms 656 KB Output is correct
11 Correct 13 ms 560 KB Output is correct
12 Correct 16 ms 596 KB Output is correct
13 Correct 18 ms 692 KB Output is correct
14 Correct 17 ms 596 KB Output is correct
15 Correct 15 ms 668 KB Output is correct
16 Correct 12 ms 596 KB Output is correct
17 Correct 13 ms 596 KB Output is correct
18 Correct 1264 ms 4648 KB Output is correct
19 Correct 1268 ms 4584 KB Output is correct
20 Correct 1315 ms 4600 KB Output is correct
21 Correct 1312 ms 4712 KB Output is correct
22 Correct 1262 ms 4840 KB Output is correct
23 Correct 1779 ms 5328 KB Output is correct
24 Correct 1740 ms 5500 KB Output is correct
25 Correct 1737 ms 5276 KB Output is correct
26 Correct 31 ms 2412 KB Output is correct
27 Correct 958 ms 5096 KB Output is correct
28 Correct 941 ms 4860 KB Output is correct
29 Correct 1250 ms 5408 KB Output is correct
30 Correct 1291 ms 5096 KB Output is correct
31 Correct 960 ms 3816 KB Output is correct
32 Correct 623 ms 3184 KB Output is correct
33 Correct 1157 ms 3992 KB Output is correct
34 Correct 1024 ms 3828 KB Output is correct
35 Correct 35 ms 2508 KB Output is correct
36 Correct 1113 ms 3924 KB Output is correct
37 Correct 956 ms 3848 KB Output is correct
38 Correct 863 ms 3820 KB Output is correct
39 Correct 742 ms 4092 KB Output is correct
40 Correct 770 ms 3908 KB Output is correct
41 Correct 805 ms 3640 KB Output is correct
42 Correct 713 ms 3576 KB Output is correct
43 Correct 2169 ms 6400 KB Output is correct
44 Correct 31 ms 2516 KB Output is correct
45 Correct 208 ms 4444 KB Output is correct
46 Correct 106 ms 4448 KB Output is correct
47 Correct 1273 ms 6340 KB Output is correct
48 Correct 2008 ms 6320 KB Output is correct
49 Correct 1249 ms 6380 KB Output is correct
50 Correct 951 ms 4460 KB Output is correct
51 Correct 930 ms 4400 KB Output is correct
52 Correct 995 ms 5008 KB Output is correct
53 Correct 1589 ms 5804 KB Output is correct
54 Correct 1607 ms 5860 KB Output is correct
55 Correct 1633 ms 5800 KB Output is correct
56 Correct 1112 ms 6304 KB Output is correct
57 Correct 1171 ms 6464 KB Output is correct
58 Correct 2172 ms 6316 KB Output is correct
59 Correct 2121 ms 6376 KB Output is correct
60 Correct 1978 ms 6228 KB Output is correct
61 Correct 1978 ms 6484 KB Output is correct
62 Correct 1716 ms 5924 KB Output is correct
63 Correct 1837 ms 5936 KB Output is correct
64 Correct 2049 ms 6480 KB Output is correct
65 Correct 1228 ms 5920 KB Output is correct
66 Correct 1260 ms 4724 KB Output is correct
67 Correct 1609 ms 4812 KB Output is correct
68 Correct 1450 ms 4644 KB Output is correct
69 Correct 1086 ms 4544 KB Output is correct
70 Correct 1503 ms 4668 KB Output is correct
71 Correct 1432 ms 4668 KB Output is correct
72 Correct 1501 ms 4872 KB Output is correct
73 Correct 1392 ms 4528 KB Output is correct
74 Correct 1379 ms 4608 KB Output is correct
75 Correct 1370 ms 4608 KB Output is correct
76 Correct 1100 ms 4396 KB Output is correct
77 Correct 1112 ms 4492 KB Output is correct
78 Correct 1129 ms 4380 KB Output is correct
79 Correct 1033 ms 4572 KB Output is correct
80 Correct 967 ms 4484 KB Output is correct
81 Correct 1029 ms 4388 KB Output is correct
82 Correct 1040 ms 4520 KB Output is correct
83 Correct 998 ms 4388 KB Output is correct
84 Correct 1010 ms 4304 KB Output is correct
85 Correct 2168 ms 6692 KB Output is correct
86 Correct 239 ms 4692 KB Output is correct
87 Correct 128 ms 4476 KB Output is correct
88 Correct 1452 ms 6960 KB Output is correct
89 Correct 2417 ms 6740 KB Output is correct
90 Correct 1392 ms 6620 KB Output is correct
91 Correct 1332 ms 4596 KB Output is correct
92 Correct 1289 ms 4524 KB Output is correct
93 Correct 1804 ms 5436 KB Output is correct
94 Correct 1963 ms 6016 KB Output is correct
95 Correct 1824 ms 5916 KB Output is correct
96 Correct 1978 ms 6436 KB Output is correct
97 Correct 1114 ms 6800 KB Output is correct
98 Correct 1249 ms 6552 KB Output is correct
99 Correct 2226 ms 6816 KB Output is correct
100 Correct 2235 ms 6608 KB Output is correct
101 Correct 2238 ms 6828 KB Output is correct
102 Correct 2197 ms 6480 KB Output is correct
103 Correct 2187 ms 6204 KB Output is correct
104 Correct 2132 ms 6468 KB Output is correct
105 Correct 1864 ms 5952 KB Output is correct
106 Correct 1605 ms 5748 KB Output is correct
107 Correct 1671 ms 6524 KB Output is correct
108 Correct 2196 ms 6880 KB Output is correct
109 Correct 1444 ms 6708 KB Output is correct