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Submission #906513

# Submission time Handle Problem Language Result Execution time Memory
906513 2024-01-14T11:22:49 Z imarn Bridges (APIO19_bridges) C++14
100 / 100
 1818 ms 94592 KB 
#include<bits/stdc++.h>
#define ll long long
#define pii pair<ll,ll>
#define f first
#define s second
#define pb push_back
#define all(x) x.begin(),x.end()
using namespace std;
const int N=1e5+5,B=1000;
int pr[N],u[N],v[N],w[N],t[N],x[N],y[N],sz[N];
stack<pii>st;
bool vis[100001]{0};
int ans[100001]{0};
int get(int r){
    return pr[r]==r?r:get(pr[r]);
}
void uni(int a,int b){
    a=get(a),b=get(b);
    if(a==b)return;
    if(sz[a]<sz[b])swap(a,b);
    pr[b]=a;sz[a]+=sz[b];
    st.push({a,b});
}
void rollback(int x){
    while(st.size()>x){
        pii u=st.top();st.pop();
        sz[u.f]-=sz[u.s];pr[u.s]=u.s;
    }
}
vector<int>block[1001];
bool cmp1(int a,int b){
    return y[a]>y[b];
}
bool cmp2(int a,int b){
    return w[a]>w[b];
}
int main() {
    ios_base::sync_with_stdio(0);cin.tie(0);
    int n,m;cin>>n>>m;
    for(int i=1;i<=m;i++)cin>>u[i]>>v[i]>>w[i];
    int q;cin>>q;
    for(int i=1;i<=q;i++)cin>>t[i]>>x[i]>>y[i];
    for(int l=1;l<=q;l+=B){
        int r=min(q,l+B-1);
        iota(pr,pr+n+1,0);
        memset(vis,0,sizeof vis);
        vector<int>up,un,qr;
        for(int j=1;j<=n;j++)sz[j]=1;
        for(int j=l;j<=r;j++){
            if(t[j]==1)vis[x[j]]=1,up.pb(j);
            else qr.pb(j);
        }
        for(int j=1;j<=m;j++)if(!vis[j])un.pb(j);
        for(int j=l;j<=r;j++){
            if(t[j]==1)w[x[j]]=y[j];
            else {
                block[j-l].clear();
                for(auto it : up)if(w[x[it]]>=y[j])block[j-l].pb(x[it]);
            }
        }
        sort(qr.begin(),qr.end(),cmp1);
        sort(un.begin(),un.end(),cmp2);
        int cur=0;
        for(int j=0;j<qr.size();j++){
            while(cur<un.size()&&w[un[cur]]>=y[qr[j]])uni(u[un[cur]],v[un[cur]]),cur++;
            int prev=st.size();
            for(auto it : block[qr[j]-l])uni(u[it],v[it]);
            ans[qr[j]] = sz[get(x[qr[j]])];
            rollback(prev);
        }
    }
    for(int i=1;i<=q;i++)if(t[i]==2)cout<<ans[i]<<'\n';
}

Compilation message

bridges.cpp: In function 'void rollback(int)':
bridges.cpp:25:20: warning: comparison of integer expressions of different signedness: 'std::stack<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   25 |     while(st.size()>x){
      |           ~~~~~~~~~^~
bridges.cpp: In function 'int main()':
bridges.cpp:64:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |         for(int j=0;j<qr.size();j++){
      |                     ~^~~~~~~~~~
bridges.cpp:65:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |             while(cur<un.size()&&w[un[cur]]>=y[qr[j]])uni(u[un[cur]],v[un[cur]]),cur++;
      |                   ~~~^~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 24 ms 4752 KB Output is correct
4 Correct 4 ms 2648 KB Output is correct
5 Correct 25 ms 4916 KB Output is correct
6 Correct 17 ms 4444 KB Output is correct
7 Correct 21 ms 5468 KB Output is correct
8 Correct 31 ms 4684 KB Output is correct
9 Correct 24 ms 6236 KB Output is correct
10 Correct 27 ms 4700 KB Output is correct
11 Correct 27 ms 4516 KB Output is correct
12 Correct 32 ms 4700 KB Output is correct
13 Correct 31 ms 4692 KB Output is correct
14 Correct 29 ms 4692 KB Output is correct
15 Correct 33 ms 4888 KB Output is correct
16 Correct 24 ms 5876 KB Output is correct
17 Correct 25 ms 5468 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1033 ms 87996 KB Output is correct
2 Correct 1063 ms 87260 KB Output is correct
3 Correct 1061 ms 87204 KB Output is correct
4 Correct 1069 ms 88124 KB Output is correct
5 Correct 1060 ms 87156 KB Output is correct
6 Correct 1182 ms 90008 KB Output is correct
7 Correct 1163 ms 89776 KB Output is correct
8 Correct 1190 ms 89112 KB Output is correct
9 Correct 27 ms 3040 KB Output is correct
10 Correct 604 ms 89308 KB Output is correct
11 Correct 600 ms 88916 KB Output is correct
12 Correct 970 ms 86204 KB Output is correct
13 Correct 920 ms 88168 KB Output is correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 745 ms 58592 KB Output is correct
2 Correct 442 ms 21456 KB Output is correct
3 Correct 768 ms 62864 KB Output is correct
4 Correct 759 ms 61388 KB Output is correct
5 Correct 28 ms 4044 KB Output is correct
6 Correct 809 ms 61248 KB Output is correct
7 Correct 723 ms 60776 KB Output is correct
8 Correct 651 ms 60548 KB Output is correct
9 Correct 548 ms 59844 KB Output is correct
10 Correct 526 ms 59652 KB Output is correct
11 Correct 581 ms 61564 KB Output is correct
12 Correct 559 ms 61272 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1470 ms 85288 KB Output is correct
2 Correct 29 ms 4176 KB Output is correct
3 Correct 147 ms 6392 KB Output is correct
4 Correct 71 ms 6476 KB Output is correct
5 Correct 756 ms 87528 KB Output is correct
6 Correct 1440 ms 88896 KB Output is correct
7 Correct 790 ms 88400 KB Output is correct
8 Correct 726 ms 88352 KB Output is correct
9 Correct 720 ms 88664 KB Output is correct
10 Correct 722 ms 88372 KB Output is correct
11 Correct 1103 ms 90376 KB Output is correct
12 Correct 1139 ms 90244 KB Output is correct
13 Correct 1142 ms 89280 KB Output is correct
14 Correct 746 ms 87308 KB Output is correct
15 Correct 743 ms 87352 KB Output is correct
16 Correct 1513 ms 89980 KB Output is correct
17 Correct 1531 ms 90676 KB Output is correct
18 Correct 1516 ms 90428 KB Output is correct
19 Correct 1481 ms 90328 KB Output is correct
20 Correct 1244 ms 89576 KB Output is correct
21 Correct 1254 ms 89644 KB Output is correct
22 Correct 1418 ms 88260 KB Output is correct
23 Correct 816 ms 80768 KB Output is correct

Subtask #5
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1033 ms 87996 KB Output is correct
2 Correct 1063 ms 87260 KB Output is correct
3 Correct 1061 ms 87204 KB Output is correct
4 Correct 1069 ms 88124 KB Output is correct
5 Correct 1060 ms 87156 KB Output is correct
6 Correct 1182 ms 90008 KB Output is correct
7 Correct 1163 ms 89776 KB Output is correct
8 Correct 1190 ms 89112 KB Output is correct
9 Correct 27 ms 3040 KB Output is correct
10 Correct 604 ms 89308 KB Output is correct
11 Correct 600 ms 88916 KB Output is correct
12 Correct 970 ms 86204 KB Output is correct
13 Correct 920 ms 88168 KB Output is correct
14 Correct 745 ms 58592 KB Output is correct
15 Correct 442 ms 21456 KB Output is correct
16 Correct 768 ms 62864 KB Output is correct
17 Correct 759 ms 61388 KB Output is correct
18 Correct 28 ms 4044 KB Output is correct
19 Correct 809 ms 61248 KB Output is correct
20 Correct 723 ms 60776 KB Output is correct
21 Correct 651 ms 60548 KB Output is correct
22 Correct 548 ms 59844 KB Output is correct
23 Correct 526 ms 59652 KB Output is correct
24 Correct 581 ms 61564 KB Output is correct
25 Correct 559 ms 61272 KB Output is correct
26 Correct 1034 ms 90068 KB Output is correct
27 Correct 1134 ms 92556 KB Output is correct
28 Correct 1076 ms 89780 KB Output is correct
29 Correct 878 ms 89020 KB Output is correct
30 Correct 1150 ms 92456 KB Output is correct
31 Correct 1120 ms 91592 KB Output is correct
32 Correct 1180 ms 91724 KB Output is correct
33 Correct 1065 ms 89848 KB Output is correct
34 Correct 1088 ms 90664 KB Output is correct
35 Correct 1059 ms 89924 KB Output is correct
36 Correct 883 ms 90132 KB Output is correct
37 Correct 880 ms 89112 KB Output is correct
38 Correct 900 ms 89348 KB Output is correct
39 Correct 779 ms 88748 KB Output is correct
40 Correct 762 ms 88440 KB Output is correct
41 Correct 769 ms 89184 KB Output is correct
42 Correct 782 ms 87908 KB Output is correct
43 Correct 756 ms 87788 KB Output is correct
44 Correct 751 ms 88344 KB Output is correct

Subtask #6
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 24 ms 4752 KB Output is correct
4 Correct 4 ms 2648 KB Output is correct
5 Correct 25 ms 4916 KB Output is correct
6 Correct 17 ms 4444 KB Output is correct
7 Correct 21 ms 5468 KB Output is correct
8 Correct 31 ms 4684 KB Output is correct
9 Correct 24 ms 6236 KB Output is correct
10 Correct 27 ms 4700 KB Output is correct
11 Correct 27 ms 4516 KB Output is correct
12 Correct 32 ms 4700 KB Output is correct
13 Correct 31 ms 4692 KB Output is correct
14 Correct 29 ms 4692 KB Output is correct
15 Correct 33 ms 4888 KB Output is correct
16 Correct 24 ms 5876 KB Output is correct
17 Correct 25 ms 5468 KB Output is correct
18 Correct 1033 ms 87996 KB Output is correct
19 Correct 1063 ms 87260 KB Output is correct
20 Correct 1061 ms 87204 KB Output is correct
21 Correct 1069 ms 88124 KB Output is correct
22 Correct 1060 ms 87156 KB Output is correct
23 Correct 1182 ms 90008 KB Output is correct
24 Correct 1163 ms 89776 KB Output is correct
25 Correct 1190 ms 89112 KB Output is correct
26 Correct 27 ms 3040 KB Output is correct
27 Correct 604 ms 89308 KB Output is correct
28 Correct 600 ms 88916 KB Output is correct
29 Correct 970 ms 86204 KB Output is correct
30 Correct 920 ms 88168 KB Output is correct
31 Correct 745 ms 58592 KB Output is correct
32 Correct 442 ms 21456 KB Output is correct
33 Correct 768 ms 62864 KB Output is correct
34 Correct 759 ms 61388 KB Output is correct
35 Correct 28 ms 4044 KB Output is correct
36 Correct 809 ms 61248 KB Output is correct
37 Correct 723 ms 60776 KB Output is correct
38 Correct 651 ms 60548 KB Output is correct
39 Correct 548 ms 59844 KB Output is correct
40 Correct 526 ms 59652 KB Output is correct
41 Correct 581 ms 61564 KB Output is correct
42 Correct 559 ms 61272 KB Output is correct
43 Correct 1470 ms 85288 KB Output is correct
44 Correct 29 ms 4176 KB Output is correct
45 Correct 147 ms 6392 KB Output is correct
46 Correct 71 ms 6476 KB Output is correct
47 Correct 756 ms 87528 KB Output is correct
48 Correct 1440 ms 88896 KB Output is correct
49 Correct 790 ms 88400 KB Output is correct
50 Correct 726 ms 88352 KB Output is correct
51 Correct 720 ms 88664 KB Output is correct
52 Correct 722 ms 88372 KB Output is correct
53 Correct 1103 ms 90376 KB Output is correct
54 Correct 1139 ms 90244 KB Output is correct
55 Correct 1142 ms 89280 KB Output is correct
56 Correct 746 ms 87308 KB Output is correct
57 Correct 743 ms 87352 KB Output is correct
58 Correct 1513 ms 89980 KB Output is correct
59 Correct 1531 ms 90676 KB Output is correct
60 Correct 1516 ms 90428 KB Output is correct
61 Correct 1481 ms 90328 KB Output is correct
62 Correct 1244 ms 89576 KB Output is correct
63 Correct 1254 ms 89644 KB Output is correct
64 Correct 1418 ms 88260 KB Output is correct
65 Correct 816 ms 80768 KB Output is correct
66 Correct 1034 ms 90068 KB Output is correct
67 Correct 1134 ms 92556 KB Output is correct
68 Correct 1076 ms 89780 KB Output is correct
69 Correct 878 ms 89020 KB Output is correct
70 Correct 1150 ms 92456 KB Output is correct
71 Correct 1120 ms 91592 KB Output is correct
72 Correct 1180 ms 91724 KB Output is correct
73 Correct 1065 ms 89848 KB Output is correct
74 Correct 1088 ms 90664 KB Output is correct
75 Correct 1059 ms 89924 KB Output is correct
76 Correct 883 ms 90132 KB Output is correct
77 Correct 880 ms 89112 KB Output is correct
78 Correct 900 ms 89348 KB Output is correct
79 Correct 779 ms 88748 KB Output is correct
80 Correct 762 ms 88440 KB Output is correct
81 Correct 769 ms 89184 KB Output is correct
82 Correct 782 ms 87908 KB Output is correct
83 Correct 756 ms 87788 KB Output is correct
84 Correct 751 ms 88344 KB Output is correct
85 Correct 1708 ms 91260 KB Output is correct
86 Correct 167 ms 8308 KB Output is correct
87 Correct 90 ms 9828 KB Output is correct
88 Correct 936 ms 91424 KB Output is correct
89 Correct 1691 ms 91256 KB Output is correct
90 Correct 939 ms 91332 KB Output is correct
91 Correct 1133 ms 90512 KB Output is correct
92 Correct 1072 ms 89844 KB Output is correct
93 Correct 1270 ms 92432 KB Output is correct
94 Correct 1391 ms 92072 KB Output is correct
95 Correct 1388 ms 91728 KB Output is correct
96 Correct 1407 ms 93304 KB Output is correct
97 Correct 854 ms 88908 KB Output is correct
98 Correct 890 ms 90932 KB Output is correct
99 Correct 1818 ms 93344 KB Output is correct
100 Correct 1727 ms 92200 KB Output is correct
101 Correct 1775 ms 92780 KB Output is correct
102 Correct 1760 ms 93544 KB Output is correct
103 Correct 1538 ms 94500 KB Output is correct
104 Correct 1579 ms 93704 KB Output is correct
105 Correct 1353 ms 94592 KB Output is correct
106 Correct 1161 ms 93208 KB Output is correct
107 Correct 1317 ms 90184 KB Output is correct
108 Correct 1679 ms 90932 KB Output is correct
109 Correct 1036 ms 85112 KB Output is correct