#include <bits/stdc++.h>
using namespace std ;
#define int int64_t //be careful about this
#define endl "\n"
#define f(i,a,b) for(int i=int(a);i<int(b);++i)
#define pr pair
#define ar array
#define fr first
#define sc second
#define vt vector
#define pb push_back
#define eb emplace_back
#define LB lower_bound
#define UB upper_bound
#define PQ priority_queue
#define sz(x) ((int)(x).size())
#define all(a) (a).begin(),(a).end()
#define allr(a) (a).rbegin(),(a).rend()
#define mem(a,b) memset(a, b, sizeof(a))
template<class A> void rd(vt<A>& v);
template<class T> void rd(T& x){ cin >> x; }
template<class H, class... T> void rd(H& h, T&... t) { rd(h) ; rd(t...) ;}
template<class A> void rd(vt<A>& x) { for(auto& a : x) rd(a) ;}
template<class T> bool ckmin(T& a, const T& b) { return b < a ? a = b, 1 : 0; }
template<class T> bool ckmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; }
template<typename T>
void __p(T a) {
cout<<a;
}
template<typename T, typename F>
void __p(pair<T, F> a) {
cout<<"{";
__p(a.first);
cout<<",";
__p(a.second);
cout<<"}\n";
}
template<typename T>
void __p(std::vector<T> a) {
cout<<"{";
for(auto it=a.begin(); it<a.end(); it++)
__p(*it),cout<<",}\n"[it+1==a.end()];
}
template<typename T, typename ...Arg>
void __p(T a1, Arg ...a) {
__p(a1);
__p(a...);
}
template<typename Arg1>
void __f(const char *name, Arg1 &&arg1) {
cout<<name<<" : ";
__p(arg1);
cout<<endl;
}
template<typename Arg1, typename ... Args>
void __f(const char *names, Arg1 &&arg1, Args &&... args) {
int bracket=0,i=0;
for(;; i++)
if(names[i]==','&&bracket==0)
break;
else if(names[i]=='(')
bracket++;
else if(names[i]==')')
bracket--;
const char *comma=names+i;
cout.write(names,comma-names)<<" : ";
__p(arg1);
cout<<" | ";
__f(comma+1,args...);
}
void setIO(string s = "") {
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
cin.exceptions(cin.failbit);
cout.precision(15); cout << fixed;
#ifdef ONLINE_JUDGE
if(sz(s)){
freopen((s+".in").c_str(),"r",stdin);
freopen((s+".out").c_str(),"w",stdout);
}
#define __f(...) 0
#endif
}
// solution by :- https://usaco.guide/problems/apio-2019bridges/solution
int n, m, q;
const int BLOCK_SIZE = 1000;
const int MAX_N = 5e4 + 1, MAX_M = 1e5 + 1;
stack<int> st;
int SZ[MAX_N], parent[MAX_N];
void reset(){
iota(parent + 1, parent + n + 1, 1);
fill(SZ + 1, SZ + n + 1, 1);
return;
}
int find(int a){
while(parent[a] != a) a = parent[a];
return a;
}
void join(int a,int b){
a = find(a), b = find(b);
if(a == b) return;
if(SZ[a] > SZ[b]) swap(a,b);
// a is child of b now.
st.push(a);
SZ[b] += SZ[a], parent[a] = b;
return;
}
void roll_back(int req_size){
while(int(st.size()) > req_size){
int x = st.top(); st.pop();
SZ[parent[x]] -= SZ[x];
parent[x] = x;
}
return;
}
int u[MAX_M], v[MAX_M], w[MAX_M];
int t[MAX_M], x[MAX_M], y[MAX_M];
bool changed[MAX_M];
vector<int> to_join[BLOCK_SIZE];
int ans[MAX_M];
signed main(){
setIO();
rd(n,m);
f(i,1,m+1){
rd(u[i],v[i],w[i]);
}
rd(q);
f(i,1,q+1) rd(t[i],x[i],y[i]);
for(int l = 1; l <= q; l += BLOCK_SIZE){
int r = min(q + 1, l + BLOCK_SIZE);
reset();
fill(changed + 1, changed + m + 1, false);
vt<int> upd, ask, unchanged;
f(i,l,r){
if(t[i] == 1){
changed[x[i]] = true;
upd.pb(i);
}else{
ask.pb(i);
}
}
f(i,1,m+1) if(!changed[i]) unchanged.pb(i);
f(i,l,r){
if(t[i] == 1){
w[x[i]] = y[i];
}else{
to_join[i-l].clear();
for(auto j : upd) if (w[x[j]] >= y[i]) to_join[i-l].push_back(x[j]);
}
}
sort(all(ask),[&](auto A,auto B){
return y[A] > y[B];
});
sort(all(unchanged),[&](auto A, auto B){
return w[A] > w[B];
});
int ptr = 0;
for(auto i : ask){
while(ptr < sz(unchanged) && w[unchanged[ptr]] >= y[i]) {
join(u[unchanged[ptr]], v[unchanged[ptr]]);
ptr++;
}
int prev_size = sz(st);
for(auto j : to_join[i - l]) join(u[j], v[j]);
ans[i] = SZ[find(x[i])];
roll_back(prev_size);
}
}
f(i,1,q+1) if(t[i] == 2) cout << ans[i] << endl;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
332 KB |
Output is correct |
2 |
Correct |
1 ms |
332 KB |
Output is correct |
3 |
Correct |
39 ms |
5124 KB |
Output is correct |
4 |
Correct |
5 ms |
808 KB |
Output is correct |
5 |
Correct |
40 ms |
5440 KB |
Output is correct |
6 |
Correct |
31 ms |
5004 KB |
Output is correct |
7 |
Correct |
37 ms |
6636 KB |
Output is correct |
8 |
Correct |
41 ms |
4940 KB |
Output is correct |
9 |
Correct |
48 ms |
8220 KB |
Output is correct |
10 |
Correct |
42 ms |
5284 KB |
Output is correct |
11 |
Correct |
43 ms |
4980 KB |
Output is correct |
12 |
Correct |
50 ms |
5536 KB |
Output is correct |
13 |
Correct |
48 ms |
5188 KB |
Output is correct |
14 |
Correct |
44 ms |
4984 KB |
Output is correct |
15 |
Correct |
47 ms |
5048 KB |
Output is correct |
16 |
Correct |
46 ms |
7592 KB |
Output is correct |
17 |
Correct |
43 ms |
6468 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1639 ms |
54276 KB |
Output is correct |
2 |
Correct |
1610 ms |
54196 KB |
Output is correct |
3 |
Correct |
1594 ms |
54416 KB |
Output is correct |
4 |
Correct |
1673 ms |
54340 KB |
Output is correct |
5 |
Correct |
1656 ms |
54652 KB |
Output is correct |
6 |
Correct |
2406 ms |
57836 KB |
Output is correct |
7 |
Correct |
2410 ms |
57532 KB |
Output is correct |
8 |
Correct |
2396 ms |
57604 KB |
Output is correct |
9 |
Correct |
46 ms |
5040 KB |
Output is correct |
10 |
Correct |
1348 ms |
56596 KB |
Output is correct |
11 |
Correct |
1217 ms |
56504 KB |
Output is correct |
12 |
Correct |
1362 ms |
50960 KB |
Output is correct |
13 |
Correct |
1447 ms |
57264 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1316 ms |
38996 KB |
Output is correct |
2 |
Correct |
991 ms |
20160 KB |
Output is correct |
3 |
Correct |
1526 ms |
42068 KB |
Output is correct |
4 |
Correct |
1243 ms |
39156 KB |
Output is correct |
5 |
Correct |
49 ms |
4932 KB |
Output is correct |
6 |
Correct |
1476 ms |
39104 KB |
Output is correct |
7 |
Correct |
1185 ms |
38656 KB |
Output is correct |
8 |
Correct |
1012 ms |
38528 KB |
Output is correct |
9 |
Correct |
836 ms |
35632 KB |
Output is correct |
10 |
Correct |
737 ms |
35600 KB |
Output is correct |
11 |
Correct |
888 ms |
41480 KB |
Output is correct |
12 |
Correct |
790 ms |
41292 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1939 ms |
52624 KB |
Output is correct |
2 |
Correct |
45 ms |
4948 KB |
Output is correct |
3 |
Correct |
195 ms |
6772 KB |
Output is correct |
4 |
Correct |
97 ms |
6908 KB |
Output is correct |
5 |
Correct |
1014 ms |
51104 KB |
Output is correct |
6 |
Correct |
1783 ms |
52536 KB |
Output is correct |
7 |
Correct |
967 ms |
51200 KB |
Output is correct |
8 |
Correct |
868 ms |
49920 KB |
Output is correct |
9 |
Correct |
868 ms |
49972 KB |
Output is correct |
10 |
Correct |
893 ms |
49940 KB |
Output is correct |
11 |
Correct |
1351 ms |
51796 KB |
Output is correct |
12 |
Correct |
1360 ms |
51904 KB |
Output is correct |
13 |
Correct |
1399 ms |
51884 KB |
Output is correct |
14 |
Correct |
890 ms |
51112 KB |
Output is correct |
15 |
Correct |
944 ms |
51164 KB |
Output is correct |
16 |
Correct |
1857 ms |
53044 KB |
Output is correct |
17 |
Correct |
1856 ms |
53188 KB |
Output is correct |
18 |
Correct |
1827 ms |
53536 KB |
Output is correct |
19 |
Correct |
1812 ms |
53464 KB |
Output is correct |
20 |
Correct |
1521 ms |
52356 KB |
Output is correct |
21 |
Correct |
1524 ms |
52272 KB |
Output is correct |
22 |
Correct |
1796 ms |
51996 KB |
Output is correct |
23 |
Correct |
1077 ms |
46752 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1639 ms |
54276 KB |
Output is correct |
2 |
Correct |
1610 ms |
54196 KB |
Output is correct |
3 |
Correct |
1594 ms |
54416 KB |
Output is correct |
4 |
Correct |
1673 ms |
54340 KB |
Output is correct |
5 |
Correct |
1656 ms |
54652 KB |
Output is correct |
6 |
Correct |
2406 ms |
57836 KB |
Output is correct |
7 |
Correct |
2410 ms |
57532 KB |
Output is correct |
8 |
Correct |
2396 ms |
57604 KB |
Output is correct |
9 |
Correct |
46 ms |
5040 KB |
Output is correct |
10 |
Correct |
1348 ms |
56596 KB |
Output is correct |
11 |
Correct |
1217 ms |
56504 KB |
Output is correct |
12 |
Correct |
1362 ms |
50960 KB |
Output is correct |
13 |
Correct |
1447 ms |
57264 KB |
Output is correct |
14 |
Correct |
1316 ms |
38996 KB |
Output is correct |
15 |
Correct |
991 ms |
20160 KB |
Output is correct |
16 |
Correct |
1526 ms |
42068 KB |
Output is correct |
17 |
Correct |
1243 ms |
39156 KB |
Output is correct |
18 |
Correct |
49 ms |
4932 KB |
Output is correct |
19 |
Correct |
1476 ms |
39104 KB |
Output is correct |
20 |
Correct |
1185 ms |
38656 KB |
Output is correct |
21 |
Correct |
1012 ms |
38528 KB |
Output is correct |
22 |
Correct |
836 ms |
35632 KB |
Output is correct |
23 |
Correct |
737 ms |
35600 KB |
Output is correct |
24 |
Correct |
888 ms |
41480 KB |
Output is correct |
25 |
Correct |
790 ms |
41292 KB |
Output is correct |
26 |
Correct |
1710 ms |
54564 KB |
Output is correct |
27 |
Correct |
1990 ms |
57660 KB |
Output is correct |
28 |
Correct |
1673 ms |
54452 KB |
Output is correct |
29 |
Correct |
1208 ms |
53756 KB |
Output is correct |
30 |
Correct |
1996 ms |
57460 KB |
Output is correct |
31 |
Correct |
1974 ms |
57620 KB |
Output is correct |
32 |
Correct |
2033 ms |
57648 KB |
Output is correct |
33 |
Correct |
1635 ms |
54364 KB |
Output is correct |
34 |
Correct |
1668 ms |
54168 KB |
Output is correct |
35 |
Correct |
1675 ms |
54280 KB |
Output is correct |
36 |
Correct |
1265 ms |
53576 KB |
Output is correct |
37 |
Correct |
1237 ms |
53812 KB |
Output is correct |
38 |
Correct |
1234 ms |
53564 KB |
Output is correct |
39 |
Correct |
1048 ms |
50768 KB |
Output is correct |
40 |
Correct |
1008 ms |
50884 KB |
Output is correct |
41 |
Correct |
1006 ms |
50752 KB |
Output is correct |
42 |
Correct |
1072 ms |
54984 KB |
Output is correct |
43 |
Correct |
1000 ms |
54920 KB |
Output is correct |
44 |
Correct |
1000 ms |
54628 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
332 KB |
Output is correct |
2 |
Correct |
1 ms |
332 KB |
Output is correct |
3 |
Correct |
39 ms |
5124 KB |
Output is correct |
4 |
Correct |
5 ms |
808 KB |
Output is correct |
5 |
Correct |
40 ms |
5440 KB |
Output is correct |
6 |
Correct |
31 ms |
5004 KB |
Output is correct |
7 |
Correct |
37 ms |
6636 KB |
Output is correct |
8 |
Correct |
41 ms |
4940 KB |
Output is correct |
9 |
Correct |
48 ms |
8220 KB |
Output is correct |
10 |
Correct |
42 ms |
5284 KB |
Output is correct |
11 |
Correct |
43 ms |
4980 KB |
Output is correct |
12 |
Correct |
50 ms |
5536 KB |
Output is correct |
13 |
Correct |
48 ms |
5188 KB |
Output is correct |
14 |
Correct |
44 ms |
4984 KB |
Output is correct |
15 |
Correct |
47 ms |
5048 KB |
Output is correct |
16 |
Correct |
46 ms |
7592 KB |
Output is correct |
17 |
Correct |
43 ms |
6468 KB |
Output is correct |
18 |
Correct |
1639 ms |
54276 KB |
Output is correct |
19 |
Correct |
1610 ms |
54196 KB |
Output is correct |
20 |
Correct |
1594 ms |
54416 KB |
Output is correct |
21 |
Correct |
1673 ms |
54340 KB |
Output is correct |
22 |
Correct |
1656 ms |
54652 KB |
Output is correct |
23 |
Correct |
2406 ms |
57836 KB |
Output is correct |
24 |
Correct |
2410 ms |
57532 KB |
Output is correct |
25 |
Correct |
2396 ms |
57604 KB |
Output is correct |
26 |
Correct |
46 ms |
5040 KB |
Output is correct |
27 |
Correct |
1348 ms |
56596 KB |
Output is correct |
28 |
Correct |
1217 ms |
56504 KB |
Output is correct |
29 |
Correct |
1362 ms |
50960 KB |
Output is correct |
30 |
Correct |
1447 ms |
57264 KB |
Output is correct |
31 |
Correct |
1316 ms |
38996 KB |
Output is correct |
32 |
Correct |
991 ms |
20160 KB |
Output is correct |
33 |
Correct |
1526 ms |
42068 KB |
Output is correct |
34 |
Correct |
1243 ms |
39156 KB |
Output is correct |
35 |
Correct |
49 ms |
4932 KB |
Output is correct |
36 |
Correct |
1476 ms |
39104 KB |
Output is correct |
37 |
Correct |
1185 ms |
38656 KB |
Output is correct |
38 |
Correct |
1012 ms |
38528 KB |
Output is correct |
39 |
Correct |
836 ms |
35632 KB |
Output is correct |
40 |
Correct |
737 ms |
35600 KB |
Output is correct |
41 |
Correct |
888 ms |
41480 KB |
Output is correct |
42 |
Correct |
790 ms |
41292 KB |
Output is correct |
43 |
Correct |
1939 ms |
52624 KB |
Output is correct |
44 |
Correct |
45 ms |
4948 KB |
Output is correct |
45 |
Correct |
195 ms |
6772 KB |
Output is correct |
46 |
Correct |
97 ms |
6908 KB |
Output is correct |
47 |
Correct |
1014 ms |
51104 KB |
Output is correct |
48 |
Correct |
1783 ms |
52536 KB |
Output is correct |
49 |
Correct |
967 ms |
51200 KB |
Output is correct |
50 |
Correct |
868 ms |
49920 KB |
Output is correct |
51 |
Correct |
868 ms |
49972 KB |
Output is correct |
52 |
Correct |
893 ms |
49940 KB |
Output is correct |
53 |
Correct |
1351 ms |
51796 KB |
Output is correct |
54 |
Correct |
1360 ms |
51904 KB |
Output is correct |
55 |
Correct |
1399 ms |
51884 KB |
Output is correct |
56 |
Correct |
890 ms |
51112 KB |
Output is correct |
57 |
Correct |
944 ms |
51164 KB |
Output is correct |
58 |
Correct |
1857 ms |
53044 KB |
Output is correct |
59 |
Correct |
1856 ms |
53188 KB |
Output is correct |
60 |
Correct |
1827 ms |
53536 KB |
Output is correct |
61 |
Correct |
1812 ms |
53464 KB |
Output is correct |
62 |
Correct |
1521 ms |
52356 KB |
Output is correct |
63 |
Correct |
1524 ms |
52272 KB |
Output is correct |
64 |
Correct |
1796 ms |
51996 KB |
Output is correct |
65 |
Correct |
1077 ms |
46752 KB |
Output is correct |
66 |
Correct |
1710 ms |
54564 KB |
Output is correct |
67 |
Correct |
1990 ms |
57660 KB |
Output is correct |
68 |
Correct |
1673 ms |
54452 KB |
Output is correct |
69 |
Correct |
1208 ms |
53756 KB |
Output is correct |
70 |
Correct |
1996 ms |
57460 KB |
Output is correct |
71 |
Correct |
1974 ms |
57620 KB |
Output is correct |
72 |
Correct |
2033 ms |
57648 KB |
Output is correct |
73 |
Correct |
1635 ms |
54364 KB |
Output is correct |
74 |
Correct |
1668 ms |
54168 KB |
Output is correct |
75 |
Correct |
1675 ms |
54280 KB |
Output is correct |
76 |
Correct |
1265 ms |
53576 KB |
Output is correct |
77 |
Correct |
1237 ms |
53812 KB |
Output is correct |
78 |
Correct |
1234 ms |
53564 KB |
Output is correct |
79 |
Correct |
1048 ms |
50768 KB |
Output is correct |
80 |
Correct |
1008 ms |
50884 KB |
Output is correct |
81 |
Correct |
1006 ms |
50752 KB |
Output is correct |
82 |
Correct |
1072 ms |
54984 KB |
Output is correct |
83 |
Correct |
1000 ms |
54920 KB |
Output is correct |
84 |
Correct |
1000 ms |
54628 KB |
Output is correct |
85 |
Correct |
2457 ms |
57220 KB |
Output is correct |
86 |
Correct |
226 ms |
10792 KB |
Output is correct |
87 |
Correct |
143 ms |
13500 KB |
Output is correct |
88 |
Correct |
1601 ms |
58904 KB |
Output is correct |
89 |
Correct |
2417 ms |
57284 KB |
Output is correct |
90 |
Correct |
1566 ms |
58952 KB |
Output is correct |
91 |
Correct |
1814 ms |
54380 KB |
Output is correct |
92 |
Correct |
1757 ms |
54316 KB |
Output is correct |
93 |
Correct |
2487 ms |
57040 KB |
Output is correct |
94 |
Correct |
2005 ms |
57036 KB |
Output is correct |
95 |
Correct |
2024 ms |
56900 KB |
Output is correct |
96 |
Correct |
2452 ms |
59852 KB |
Output is correct |
97 |
Correct |
1191 ms |
52076 KB |
Output is correct |
98 |
Correct |
1242 ms |
58720 KB |
Output is correct |
99 |
Correct |
2407 ms |
58060 KB |
Output is correct |
100 |
Correct |
2396 ms |
57580 KB |
Output is correct |
101 |
Correct |
2564 ms |
58140 KB |
Output is correct |
102 |
Correct |
2452 ms |
58292 KB |
Output is correct |
103 |
Correct |
2653 ms |
60840 KB |
Output is correct |
104 |
Correct |
2684 ms |
60220 KB |
Output is correct |
105 |
Correct |
1997 ms |
60000 KB |
Output is correct |
106 |
Correct |
1572 ms |
59892 KB |
Output is correct |
107 |
Correct |
1862 ms |
53476 KB |
Output is correct |
108 |
Correct |
2568 ms |
57852 KB |
Output is correct |
109 |
Correct |
1833 ms |
54672 KB |
Output is correct |