oj.uz

Submission #552775

# Submission time Handle Problem Language Result Execution time Memory
552775 2022-04-23T21:45:47 Z jjaewon Bridges (APIO19_bridges) C++14
100 / 100
 2378 ms 12304 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll,ll> pll;
typedef pair<int,int> pii;
#define fi first
#define se second
#define endl '\n'
#define y1 holyshit
#define all(x) x.begin(),x.end()
const int inf=0x3f3f3f3f;

#define SZ 700

struct DATA{
    //type 0: edge, type 1: query 1, type 2: query 2
    int type,idx,u,v,d;
    bool operator<(const DATA& p) const{ return d==p.d?type>p.type:d<p.d; }
}edge[100010];
vector<DATA> query;
int N,M,Q,ans[100010];

int p[50010],sz[50010];
stack<pii> st;
int find(int x){ return x==p[x]?x:find(p[x]); }
void merge(int x,int y,bool undo){
    x=find(x); y=find(y);
    if(x==y) return;
    if(sz[x]<sz[y]) swap(x,y);
    sz[x]+=sz[y];
    p[y]=x;
    if(undo) st.push({x,y});
}

void solve(){
    vector<DATA> v;
    vector<int> md;
    bool used[100010]={0};
    int w[100010];
    for(auto i:query){
        if(i.type==1) used[i.u]=1;
        else if(i.type==2) v.push_back(i);
    }
    for(int i=1;i<=M;i++){
        if(!used[i]) v.push_back(edge[i]);
        else{
            md.push_back(i);
            w[i]=edge[i].d;
        }
    }
    sort(all(v));
    reverse(all(v));
    for(int i=1;i<=N;i++) p[i]=i, sz[i]=1;
    for(auto i:v){
        if(i.type==0){
            merge(i.u,i.v,0);
            //cout<<"set "<<i.u<<' '<<i.v<<' '<<i.d<<endl;
        }
        else{
            //cout<<'#'<<' '<<i.idx<<endl;
            for(auto j:query){
                if(i.idx==j.idx) break;
                if(j.type==1) w[j.u]=j.d;
            }
            for(auto j:md) if(w[j]>=i.d){
                merge(edge[j].u,edge[j].v,1);
                //cout<<"add "<<edge[j].u<<' '<<edge[j].v<<' '<<w[j]<<endl;
            }
            ans[i.idx]=sz[find(i.u)];
            //cout<<"ans: "<<ans[i.idx]<<endl;
            for(auto j:md) w[j]=edge[j].d;
            while(!st.empty()){
                auto [x,y]=st.top();
                sz[x]-=sz[y];
                p[y]=y;
                st.pop();
            }
        }
    }
}

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin>>N>>M;
    for(int i=1;i<=M;i++){
        int u,v,d; cin>>u>>v>>d;
        edge[i]={0,i,u,v,d};
    }
    cin>>Q;
    for(int i=1;i<=Q;i++){
        int t,a,b; cin>>t>>a>>b;
        query.push_back({t,i,a,0,b});
        if(i%SZ==0){
            solve();
            for(auto j:query) if(j.type==1) edge[j.u].d=j.d;
            query.clear();
        }
    }
    solve();
    for(int i=1;i<=Q;i++) if(ans[i]>0) cout<<ans[i]<<endl;
    return 0;
}

Compilation message

bridges.cpp: In function 'void solve()':
bridges.cpp:73:22: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   73 |                 auto [x,y]=st.top();
      |                      ^

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 724 KB Output is correct
2 Correct 1 ms 724 KB Output is correct
3 Correct 27 ms 1128 KB Output is correct
4 Correct 7 ms 980 KB Output is correct
5 Correct 14 ms 1004 KB Output is correct
6 Correct 14 ms 980 KB Output is correct
7 Correct 14 ms 984 KB Output is correct
8 Correct 14 ms 1068 KB Output is correct
9 Correct 18 ms 988 KB Output is correct
10 Correct 15 ms 1056 KB Output is correct
11 Correct 15 ms 1056 KB Output is correct
12 Correct 18 ms 1052 KB Output is correct
13 Correct 19 ms 1048 KB Output is correct
14 Correct 22 ms 1060 KB Output is correct
15 Correct 17 ms 1108 KB Output is correct
16 Correct 16 ms 968 KB Output is correct
17 Correct 16 ms 988 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1417 ms 5408 KB Output is correct
2 Correct 1408 ms 7696 KB Output is correct
3 Correct 1411 ms 7784 KB Output is correct
4 Correct 1440 ms 7728 KB Output is correct
5 Correct 1381 ms 7952 KB Output is correct
6 Correct 1817 ms 7520 KB Output is correct
7 Correct 1799 ms 7552 KB Output is correct
8 Correct 1799 ms 7540 KB Output is correct
9 Correct 58 ms 2764 KB Output is correct
10 Correct 1118 ms 6564 KB Output is correct
11 Correct 1103 ms 6508 KB Output is correct
12 Correct 1338 ms 7328 KB Output is correct
13 Correct 1244 ms 7668 KB Output is correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1067 ms 4440 KB Output is correct
2 Correct 653 ms 3472 KB Output is correct
3 Correct 1170 ms 6088 KB Output is correct
4 Correct 1055 ms 6492 KB Output is correct
5 Correct 80 ms 2768 KB Output is correct
6 Correct 1127 ms 6376 KB Output is correct
7 Correct 998 ms 6420 KB Output is correct
8 Correct 928 ms 6328 KB Output is correct
9 Correct 846 ms 6312 KB Output is correct
10 Correct 806 ms 6488 KB Output is correct
11 Correct 770 ms 5744 KB Output is correct
12 Correct 737 ms 5692 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2029 ms 9032 KB Output is correct
2 Correct 65 ms 1740 KB Output is correct
3 Correct 239 ms 8052 KB Output is correct
4 Correct 143 ms 8056 KB Output is correct
5 Correct 1472 ms 8940 KB Output is correct
6 Correct 2072 ms 8872 KB Output is correct
7 Correct 1442 ms 8788 KB Output is correct
8 Correct 992 ms 5692 KB Output is correct
9 Correct 1000 ms 5684 KB Output is correct
10 Correct 1030 ms 5532 KB Output is correct
11 Correct 1569 ms 7764 KB Output is correct
12 Correct 1567 ms 7824 KB Output is correct
13 Correct 1548 ms 7832 KB Output is correct
14 Correct 1239 ms 8792 KB Output is correct
15 Correct 1317 ms 8784 KB Output is correct
16 Correct 2063 ms 8744 KB Output is correct
17 Correct 2036 ms 8852 KB Output is correct
18 Correct 2000 ms 8820 KB Output is correct
19 Correct 2028 ms 8944 KB Output is correct
20 Correct 1762 ms 8172 KB Output is correct
21 Correct 1687 ms 8360 KB Output is correct
22 Correct 1946 ms 8520 KB Output is correct
23 Correct 1412 ms 8104 KB Output is correct

Subtask #5
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1417 ms 5408 KB Output is correct
2 Correct 1408 ms 7696 KB Output is correct
3 Correct 1411 ms 7784 KB Output is correct
4 Correct 1440 ms 7728 KB Output is correct
5 Correct 1381 ms 7952 KB Output is correct
6 Correct 1817 ms 7520 KB Output is correct
7 Correct 1799 ms 7552 KB Output is correct
8 Correct 1799 ms 7540 KB Output is correct
9 Correct 58 ms 2764 KB Output is correct
10 Correct 1118 ms 6564 KB Output is correct
11 Correct 1103 ms 6508 KB Output is correct
12 Correct 1338 ms 7328 KB Output is correct
13 Correct 1244 ms 7668 KB Output is correct
14 Correct 1067 ms 4440 KB Output is correct
15 Correct 653 ms 3472 KB Output is correct
16 Correct 1170 ms 6088 KB Output is correct
17 Correct 1055 ms 6492 KB Output is correct
18 Correct 80 ms 2768 KB Output is correct
19 Correct 1127 ms 6376 KB Output is correct
20 Correct 998 ms 6420 KB Output is correct
21 Correct 928 ms 6328 KB Output is correct
22 Correct 846 ms 6312 KB Output is correct
23 Correct 806 ms 6488 KB Output is correct
24 Correct 770 ms 5744 KB Output is correct
25 Correct 737 ms 5692 KB Output is correct
26 Correct 1378 ms 7640 KB Output is correct
27 Correct 1581 ms 7472 KB Output is correct
28 Correct 1412 ms 7828 KB Output is correct
29 Correct 1161 ms 7780 KB Output is correct
30 Correct 1553 ms 7496 KB Output is correct
31 Correct 1584 ms 7684 KB Output is correct
32 Correct 1544 ms 7556 KB Output is correct
33 Correct 1414 ms 7816 KB Output is correct
34 Correct 1429 ms 7680 KB Output is correct
35 Correct 1433 ms 7676 KB Output is correct
36 Correct 1215 ms 7632 KB Output is correct
37 Correct 1217 ms 7616 KB Output is correct
38 Correct 1199 ms 7768 KB Output is correct
39 Correct 1076 ms 7684 KB Output is correct
40 Correct 1057 ms 7744 KB Output is correct
41 Correct 1060 ms 7704 KB Output is correct
42 Correct 1045 ms 7656 KB Output is correct
43 Correct 1025 ms 7588 KB Output is correct
44 Correct 1014 ms 7696 KB Output is correct

Subtask #6
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 724 KB Output is correct
2 Correct 1 ms 724 KB Output is correct
3 Correct 27 ms 1128 KB Output is correct
4 Correct 7 ms 980 KB Output is correct
5 Correct 14 ms 1004 KB Output is correct
6 Correct 14 ms 980 KB Output is correct
7 Correct 14 ms 984 KB Output is correct
8 Correct 14 ms 1068 KB Output is correct
9 Correct 18 ms 988 KB Output is correct
10 Correct 15 ms 1056 KB Output is correct
11 Correct 15 ms 1056 KB Output is correct
12 Correct 18 ms 1052 KB Output is correct
13 Correct 19 ms 1048 KB Output is correct
14 Correct 22 ms 1060 KB Output is correct
15 Correct 17 ms 1108 KB Output is correct
16 Correct 16 ms 968 KB Output is correct
17 Correct 16 ms 988 KB Output is correct
18 Correct 1417 ms 5408 KB Output is correct
19 Correct 1408 ms 7696 KB Output is correct
20 Correct 1411 ms 7784 KB Output is correct
21 Correct 1440 ms 7728 KB Output is correct
22 Correct 1381 ms 7952 KB Output is correct
23 Correct 1817 ms 7520 KB Output is correct
24 Correct 1799 ms 7552 KB Output is correct
25 Correct 1799 ms 7540 KB Output is correct
26 Correct 58 ms 2764 KB Output is correct
27 Correct 1118 ms 6564 KB Output is correct
28 Correct 1103 ms 6508 KB Output is correct
29 Correct 1338 ms 7328 KB Output is correct
30 Correct 1244 ms 7668 KB Output is correct
31 Correct 1067 ms 4440 KB Output is correct
32 Correct 653 ms 3472 KB Output is correct
33 Correct 1170 ms 6088 KB Output is correct
34 Correct 1055 ms 6492 KB Output is correct
35 Correct 80 ms 2768 KB Output is correct
36 Correct 1127 ms 6376 KB Output is correct
37 Correct 998 ms 6420 KB Output is correct
38 Correct 928 ms 6328 KB Output is correct
39 Correct 846 ms 6312 KB Output is correct
40 Correct 806 ms 6488 KB Output is correct
41 Correct 770 ms 5744 KB Output is correct
42 Correct 737 ms 5692 KB Output is correct
43 Correct 2029 ms 9032 KB Output is correct
44 Correct 65 ms 1740 KB Output is correct
45 Correct 239 ms 8052 KB Output is correct
46 Correct 143 ms 8056 KB Output is correct
47 Correct 1472 ms 8940 KB Output is correct
48 Correct 2072 ms 8872 KB Output is correct
49 Correct 1442 ms 8788 KB Output is correct
50 Correct 992 ms 5692 KB Output is correct
51 Correct 1000 ms 5684 KB Output is correct
52 Correct 1030 ms 5532 KB Output is correct
53 Correct 1569 ms 7764 KB Output is correct
54 Correct 1567 ms 7824 KB Output is correct
55 Correct 1548 ms 7832 KB Output is correct
56 Correct 1239 ms 8792 KB Output is correct
57 Correct 1317 ms 8784 KB Output is correct
58 Correct 2063 ms 8744 KB Output is correct
59 Correct 2036 ms 8852 KB Output is correct
60 Correct 2000 ms 8820 KB Output is correct
61 Correct 2028 ms 8944 KB Output is correct
62 Correct 1762 ms 8172 KB Output is correct
63 Correct 1687 ms 8360 KB Output is correct
64 Correct 1946 ms 8520 KB Output is correct
65 Correct 1412 ms 8104 KB Output is correct
66 Correct 1378 ms 7640 KB Output is correct
67 Correct 1581 ms 7472 KB Output is correct
68 Correct 1412 ms 7828 KB Output is correct
69 Correct 1161 ms 7780 KB Output is correct
70 Correct 1553 ms 7496 KB Output is correct
71 Correct 1584 ms 7684 KB Output is correct
72 Correct 1544 ms 7556 KB Output is correct
73 Correct 1414 ms 7816 KB Output is correct
74 Correct 1429 ms 7680 KB Output is correct
75 Correct 1433 ms 7676 KB Output is correct
76 Correct 1215 ms 7632 KB Output is correct
77 Correct 1217 ms 7616 KB Output is correct
78 Correct 1199 ms 7768 KB Output is correct
79 Correct 1076 ms 7684 KB Output is correct
80 Correct 1057 ms 7744 KB Output is correct
81 Correct 1060 ms 7704 KB Output is correct
82 Correct 1045 ms 7656 KB Output is correct
83 Correct 1025 ms 7588 KB Output is correct
84 Correct 1014 ms 7696 KB Output is correct
85 Correct 2378 ms 12184 KB Output is correct
86 Correct 240 ms 9220 KB Output is correct
87 Correct 166 ms 9356 KB Output is correct
88 Correct 1698 ms 10416 KB Output is correct
89 Correct 2352 ms 11968 KB Output is correct
90 Correct 1705 ms 10520 KB Output is correct
91 Correct 1448 ms 7592 KB Output is correct
92 Correct 1434 ms 7804 KB Output is correct
93 Correct 1742 ms 7596 KB Output is correct
94 Correct 1882 ms 10444 KB Output is correct
95 Correct 1920 ms 10648 KB Output is correct
96 Correct 1984 ms 10224 KB Output is correct
97 Correct 1468 ms 10408 KB Output is correct
98 Correct 1439 ms 10652 KB Output is correct
99 Correct 2341 ms 12112 KB Output is correct
100 Correct 2308 ms 12004 KB Output is correct
101 Correct 2377 ms 12132 KB Output is correct
102 Correct 2362 ms 12304 KB Output is correct
103 Correct 2197 ms 11124 KB Output is correct
104 Correct 2196 ms 10980 KB Output is correct
105 Correct 1840 ms 10992 KB Output is correct
106 Correct 1583 ms 10476 KB Output is correct
107 Correct 1801 ms 11100 KB Output is correct
108 Correct 2258 ms 11496 KB Output is correct
109 Correct 1682 ms 9460 KB Output is correct