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Submission #480726

# Submission time Handle Problem Language Result Execution time Memory
480726 2021-10-18T01:03:05 Z oneloveforever Bridges (APIO19_bridges) C++11
100 / 100
 2736 ms 9612 KB 
#include<bits/stdc++.h>
using namespace std;
#define ll long long
vector<vector<int> >a;
int n,m,t;
struct edge
{
    int x,y,cost;
    edge(int _x=0,int _y=0,int _cost=0)
    {
        x=_x,y=_y,cost=_cost;
    }
};
struct query
{
    int type,x,y;
    query(int _type=0,int _x=0,int _y=0)
    {
        type=_type,x=_x,y=_y;
    }
};
struct DSU
{
    int n;
    vector<int>trace,sz,roll;
    DSU(int _n=0)
    {
        n=_n;
        trace.resize(n+7);
        sz.assign(n+7,1);
        iota(trace.begin(),trace.end(),0);
    }
    int find_dsu(int x)
    {
        return trace[x]==x?x:find_dsu(trace[x]);
    }
    void get(int x,int y)
    {
        int u=find_dsu(x);
        int v=find_dsu(y);
        if(u==v)return ;
        if(sz[u]>sz[v])swap(u,v);
        trace[u]=v;
        sz[v]+=sz[u];
        roll.push_back(u);
    }
    void rollback(int x)
    {
        while((int)roll.size()>x)
        {
            int new_node=roll.back();
            sz[trace[new_node]]-=sz[new_node];
            trace[new_node]=new_node;
            roll.pop_back();
        }
    }
};
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    cin>>n>>m;
    vector<edge>a(m+1);
    for(int i=1;i<=m;i++)
    {
        int x,y,cost;
        cin>>x>>y>>cost;
        a[i]={x,y,cost};
    }
    cin>>t;
    vector<query>q(t+1);
    for(int i=1;i<=t;i++)
    {
        int type,x,y;
        cin>>type>>x>>y;
        q[i]={type,x,y};
    }
    int sz_block=1000;
    vector<int>ans(t+1);
    for(int i=1;i<=t;i+=sz_block)
    {
        int val_x=i;
        int val_y=min(t,i+sz_block-1);
        DSU dsu(n);
        vector<int>up,answer,pre;
        vector<bool>check_edge(m+1,false);
        for(int i=val_x;i<=val_y;i++)
        {
            if(q[i].type==1)
            {
                check_edge[q[i].x]=true;
                up.push_back(i);
            }
            else answer.push_back(i);
        }
        for(int i=1;i<=m;i++)
        {
            if(check_edge[i])continue;
            pre.push_back(i);
        }
        vector<vector<int> >block(sz_block+1);
        for(int i=val_x;i<=val_y;i++)
        {
            if(q[i].type==1)a[q[i].x].cost=q[i].y;
            else
            {
                //cout<<i<<" "<<q[i].y<<endl;
                for(auto node:up)
                {
                  //  cout<<a[q[node].x].cost<<endl;
                    if(a[q[node].x].cost>=q[i].y)block[i-val_x].push_back(node);
                }
            }
        }
        sort(pre.begin(),pre.end(),[&](int x,int y){return a[x].cost>a[y].cost;});
        sort(answer.begin(),answer.end(),[&](int x,int y){return q[x].y>q[y].y;});
        int vt=0;
        for(auto node:answer)
        {
            int new_node=q[node].x;
            int cost=q[node].y;
            while(vt<(int)pre.size()&&a[pre[vt]].cost>=cost)
            {
                dsu.get(a[pre[vt]].x,a[pre[vt]].y);
                ++vt;
            }
            int need=dsu.roll.size();
            for(auto res:block[node-val_x])
            {
                dsu.get(a[q[res].x].x,a[q[res].x].y);
            }
            int pre_sz=dsu.sz[dsu.find_dsu(new_node)];
            ans[node]=pre_sz;
            dsu.rollback(need);
        }

    }
    for(int i=1;i<=t;i++)
    {
        if(q[i].type==1)continue;
        cout<<ans[i]<<endl;
    }
}

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 54 ms 1360 KB Output is correct
4 Correct 19 ms 588 KB Output is correct
5 Correct 55 ms 1540 KB Output is correct
6 Correct 44 ms 1612 KB Output is correct
7 Correct 53 ms 1776 KB Output is correct
8 Correct 53 ms 1272 KB Output is correct
9 Correct 65 ms 2476 KB Output is correct
10 Correct 57 ms 1348 KB Output is correct
11 Correct 55 ms 1336 KB Output is correct
12 Correct 64 ms 1580 KB Output is correct
13 Correct 68 ms 1372 KB Output is correct
14 Correct 59 ms 1412 KB Output is correct
15 Correct 66 ms 1348 KB Output is correct
16 Correct 56 ms 1996 KB Output is correct
17 Correct 57 ms 1704 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1709 ms 7504 KB Output is correct
2 Correct 1652 ms 7220 KB Output is correct
3 Correct 1654 ms 7412 KB Output is correct
4 Correct 1717 ms 7216 KB Output is correct
5 Correct 1701 ms 7300 KB Output is correct
6 Correct 2442 ms 8208 KB Output is correct
7 Correct 2441 ms 8148 KB Output is correct
8 Correct 2415 ms 8072 KB Output is correct
9 Correct 176 ms 3392 KB Output is correct
10 Correct 1414 ms 6760 KB Output is correct
11 Correct 1278 ms 6592 KB Output is correct
12 Correct 1485 ms 6712 KB Output is correct
13 Correct 1357 ms 6872 KB Output is correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1352 ms 6444 KB Output is correct
2 Correct 1046 ms 5188 KB Output is correct
3 Correct 1558 ms 6444 KB Output is correct
4 Correct 1315 ms 6060 KB Output is correct
5 Correct 159 ms 3388 KB Output is correct
6 Correct 1487 ms 6212 KB Output is correct
7 Correct 1219 ms 5980 KB Output is correct
8 Correct 1043 ms 5792 KB Output is correct
9 Correct 915 ms 5820 KB Output is correct
10 Correct 869 ms 5624 KB Output is correct
11 Correct 874 ms 5660 KB Output is correct
12 Correct 740 ms 5496 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1837 ms 8480 KB Output is correct
2 Correct 160 ms 3524 KB Output is correct
3 Correct 188 ms 4412 KB Output is correct
4 Correct 96 ms 4528 KB Output is correct
5 Correct 1014 ms 6972 KB Output is correct
6 Correct 1786 ms 8520 KB Output is correct
7 Correct 984 ms 6844 KB Output is correct
8 Correct 979 ms 6376 KB Output is correct
9 Correct 978 ms 6548 KB Output is correct
10 Correct 969 ms 6180 KB Output is correct
11 Correct 1393 ms 7520 KB Output is correct
12 Correct 1424 ms 7704 KB Output is correct
13 Correct 1416 ms 7640 KB Output is correct
14 Correct 922 ms 6984 KB Output is correct
15 Correct 955 ms 6820 KB Output is correct
16 Correct 1864 ms 8456 KB Output is correct
17 Correct 1857 ms 8708 KB Output is correct
18 Correct 1868 ms 8536 KB Output is correct
19 Correct 1863 ms 8396 KB Output is correct
20 Correct 1587 ms 7792 KB Output is correct
21 Correct 1615 ms 7764 KB Output is correct
22 Correct 1809 ms 8396 KB Output is correct
23 Correct 1065 ms 6248 KB Output is correct

Subtask #5
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1709 ms 7504 KB Output is correct
2 Correct 1652 ms 7220 KB Output is correct
3 Correct 1654 ms 7412 KB Output is correct
4 Correct 1717 ms 7216 KB Output is correct
5 Correct 1701 ms 7300 KB Output is correct
6 Correct 2442 ms 8208 KB Output is correct
7 Correct 2441 ms 8148 KB Output is correct
8 Correct 2415 ms 8072 KB Output is correct
9 Correct 176 ms 3392 KB Output is correct
10 Correct 1414 ms 6760 KB Output is correct
11 Correct 1278 ms 6592 KB Output is correct
12 Correct 1485 ms 6712 KB Output is correct
13 Correct 1357 ms 6872 KB Output is correct
14 Correct 1352 ms 6444 KB Output is correct
15 Correct 1046 ms 5188 KB Output is correct
16 Correct 1558 ms 6444 KB Output is correct
17 Correct 1315 ms 6060 KB Output is correct
18 Correct 159 ms 3388 KB Output is correct
19 Correct 1487 ms 6212 KB Output is correct
20 Correct 1219 ms 5980 KB Output is correct
21 Correct 1043 ms 5792 KB Output is correct
22 Correct 915 ms 5820 KB Output is correct
23 Correct 869 ms 5624 KB Output is correct
24 Correct 874 ms 5660 KB Output is correct
25 Correct 740 ms 5496 KB Output is correct
26 Correct 1744 ms 7184 KB Output is correct
27 Correct 2092 ms 7616 KB Output is correct
28 Correct 1750 ms 7252 KB Output is correct
29 Correct 1276 ms 6900 KB Output is correct
30 Correct 1984 ms 7616 KB Output is correct
31 Correct 2021 ms 7336 KB Output is correct
32 Correct 2029 ms 7288 KB Output is correct
33 Correct 1738 ms 7156 KB Output is correct
34 Correct 1738 ms 7232 KB Output is correct
35 Correct 1757 ms 7288 KB Output is correct
36 Correct 1325 ms 6920 KB Output is correct
37 Correct 1318 ms 6808 KB Output is correct
38 Correct 1282 ms 6764 KB Output is correct
39 Correct 1124 ms 6796 KB Output is correct
40 Correct 1167 ms 6940 KB Output is correct
41 Correct 1110 ms 6780 KB Output is correct
42 Correct 1027 ms 6472 KB Output is correct
43 Correct 998 ms 6764 KB Output is correct
44 Correct 959 ms 6596 KB Output is correct

Subtask #6
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 54 ms 1360 KB Output is correct
4 Correct 19 ms 588 KB Output is correct
5 Correct 55 ms 1540 KB Output is correct
6 Correct 44 ms 1612 KB Output is correct
7 Correct 53 ms 1776 KB Output is correct
8 Correct 53 ms 1272 KB Output is correct
9 Correct 65 ms 2476 KB Output is correct
10 Correct 57 ms 1348 KB Output is correct
11 Correct 55 ms 1336 KB Output is correct
12 Correct 64 ms 1580 KB Output is correct
13 Correct 68 ms 1372 KB Output is correct
14 Correct 59 ms 1412 KB Output is correct
15 Correct 66 ms 1348 KB Output is correct
16 Correct 56 ms 1996 KB Output is correct
17 Correct 57 ms 1704 KB Output is correct
18 Correct 1709 ms 7504 KB Output is correct
19 Correct 1652 ms 7220 KB Output is correct
20 Correct 1654 ms 7412 KB Output is correct
21 Correct 1717 ms 7216 KB Output is correct
22 Correct 1701 ms 7300 KB Output is correct
23 Correct 2442 ms 8208 KB Output is correct
24 Correct 2441 ms 8148 KB Output is correct
25 Correct 2415 ms 8072 KB Output is correct
26 Correct 176 ms 3392 KB Output is correct
27 Correct 1414 ms 6760 KB Output is correct
28 Correct 1278 ms 6592 KB Output is correct
29 Correct 1485 ms 6712 KB Output is correct
30 Correct 1357 ms 6872 KB Output is correct
31 Correct 1352 ms 6444 KB Output is correct
32 Correct 1046 ms 5188 KB Output is correct
33 Correct 1558 ms 6444 KB Output is correct
34 Correct 1315 ms 6060 KB Output is correct
35 Correct 159 ms 3388 KB Output is correct
36 Correct 1487 ms 6212 KB Output is correct
37 Correct 1219 ms 5980 KB Output is correct
38 Correct 1043 ms 5792 KB Output is correct
39 Correct 915 ms 5820 KB Output is correct
40 Correct 869 ms 5624 KB Output is correct
41 Correct 874 ms 5660 KB Output is correct
42 Correct 740 ms 5496 KB Output is correct
43 Correct 1837 ms 8480 KB Output is correct
44 Correct 160 ms 3524 KB Output is correct
45 Correct 188 ms 4412 KB Output is correct
46 Correct 96 ms 4528 KB Output is correct
47 Correct 1014 ms 6972 KB Output is correct
48 Correct 1786 ms 8520 KB Output is correct
49 Correct 984 ms 6844 KB Output is correct
50 Correct 979 ms 6376 KB Output is correct
51 Correct 978 ms 6548 KB Output is correct
52 Correct 969 ms 6180 KB Output is correct
53 Correct 1393 ms 7520 KB Output is correct
54 Correct 1424 ms 7704 KB Output is correct
55 Correct 1416 ms 7640 KB Output is correct
56 Correct 922 ms 6984 KB Output is correct
57 Correct 955 ms 6820 KB Output is correct
58 Correct 1864 ms 8456 KB Output is correct
59 Correct 1857 ms 8708 KB Output is correct
60 Correct 1868 ms 8536 KB Output is correct
61 Correct 1863 ms 8396 KB Output is correct
62 Correct 1587 ms 7792 KB Output is correct
63 Correct 1615 ms 7764 KB Output is correct
64 Correct 1809 ms 8396 KB Output is correct
65 Correct 1065 ms 6248 KB Output is correct
66 Correct 1744 ms 7184 KB Output is correct
67 Correct 2092 ms 7616 KB Output is correct
68 Correct 1750 ms 7252 KB Output is correct
69 Correct 1276 ms 6900 KB Output is correct
70 Correct 1984 ms 7616 KB Output is correct
71 Correct 2021 ms 7336 KB Output is correct
72 Correct 2029 ms 7288 KB Output is correct
73 Correct 1738 ms 7156 KB Output is correct
74 Correct 1738 ms 7232 KB Output is correct
75 Correct 1757 ms 7288 KB Output is correct
76 Correct 1325 ms 6920 KB Output is correct
77 Correct 1318 ms 6808 KB Output is correct
78 Correct 1282 ms 6764 KB Output is correct
79 Correct 1124 ms 6796 KB Output is correct
80 Correct 1167 ms 6940 KB Output is correct
81 Correct 1110 ms 6780 KB Output is correct
82 Correct 1027 ms 6472 KB Output is correct
83 Correct 998 ms 6764 KB Output is correct
84 Correct 959 ms 6596 KB Output is correct
85 Correct 2341 ms 9276 KB Output is correct
86 Correct 237 ms 5176 KB Output is correct
87 Correct 153 ms 6000 KB Output is correct
88 Correct 1459 ms 7984 KB Output is correct
89 Correct 2374 ms 9208 KB Output is correct
90 Correct 1481 ms 7964 KB Output is correct
91 Correct 1760 ms 7032 KB Output is correct
92 Correct 1755 ms 7284 KB Output is correct
93 Correct 2607 ms 7564 KB Output is correct
94 Correct 2109 ms 8040 KB Output is correct
95 Correct 2009 ms 8360 KB Output is correct
96 Correct 2422 ms 8916 KB Output is correct
97 Correct 1224 ms 7368 KB Output is correct
98 Correct 1145 ms 7044 KB Output is correct
99 Correct 2421 ms 9224 KB Output is correct
100 Correct 2466 ms 8988 KB Output is correct
101 Correct 2544 ms 9612 KB Output is correct
102 Correct 2469 ms 9344 KB Output is correct
103 Correct 2736 ms 9468 KB Output is correct
104 Correct 2706 ms 9436 KB Output is correct
105 Correct 1907 ms 7872 KB Output is correct
106 Correct 1506 ms 7464 KB Output is correct
107 Correct 1927 ms 7956 KB Output is correct
108 Correct 2603 ms 9052 KB Output is correct
109 Correct 1936 ms 7564 KB Output is correct