#include <bits/stdc++.h>
#define FOR(i, x, y) for (int i = x; i < y; i++)
typedef long long ll;
using namespace std;
const int B = 1000;
int n, m, q;
stack<int> stck;
int sz[100001], cmp[100001];
void reset() {
iota(cmp + 1, cmp + 1 + n, 1);
fill(sz + 1, sz + n + 1, 1);
}
inline int find(int a) {
while (cmp[a] != a) a = cmp[a];
return a;
}
void onion(int a, int b) {
a = find(a), b = find(b);
if (a == b) return;
if (sz[a] > sz[b]) swap(a, b);
stck.push(a);
sz[b] += sz[a];
cmp[a] = b;
}
void rollback(int x) {
while (stck.size() > x) {
int k = stck.top();
stck.pop();
sz[cmp[k]] -= sz[k];
cmp[k] = k;
}
}
int u[100001], v[100001], w[100001];
int t[100001], x[100001], y[100001];
bool changed[100001];
vector<int> to_join[B];
int ans[100001];
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
cin >> n >> m;
FOR(i, 1, m + 1) cin >> u[i] >> v[i] >> w[i];
cin >> q;
FOR(i, 1, q + 1) cin >> t[i] >> x[i] >> y[i];
for (int l = 1; l <= q; l += B) {
int r = min(q + 1, l + B);
reset();
fill(changed + 1, changed + m + 1, false);
vector<int> ask, upd, unchanged;
FOR(i, l, r) {
if (t[i] == 1) {
changed[x[i]] = true;
upd.push_back(i);
} else ask.push_back(i);
}
FOR(i, 1, m + 1) if (!changed[i]) unchanged.push_back(i);
FOR(i, l, r) {
if (t[i] == 1) w[x[i]] = y[i];
else {
to_join[i - l].clear();
for (int j : upd)
if (w[x[j]] >= y[i]) to_join[i - l].push_back(x[j]);
}
}
sort(ask.begin(), ask.end(), [&](int a, int b) { return y[a] > y[b]; });
sort(unchanged.begin(), unchanged.end(),
[&](int a, int b) { return w[a] > w[b]; });
int ptr = 0;
for (int i : ask) {
while (ptr < unchanged.size() && w[unchanged[ptr]] >= y[i]) {
onion(u[unchanged[ptr]], v[unchanged[ptr]]);
ptr++;
}
int prev_size = stck.size();
for (int j : to_join[i - l]) onion(u[j], v[j]);
ans[i] = sz[find(x[i])];
rollback(prev_size);
}
}
FOR(i, 1, q + 1) if (t[i] == 2) cout << ans[i] << '\n';
}
Compilation message
bridges.cpp: In function 'void rollback(int)':
bridges.cpp:33:21: warning: comparison of integer expressions of different signedness: 'std::stack<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
33 | while (stck.size() > x) {
| ~~~~~~~~~~~~^~~
bridges.cpp: In function 'int main()':
bridges.cpp:84:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
84 | while (ptr < unchanged.size() && w[unchanged[ptr]] >= y[i]) {
| ~~~~^~~~~~~~~~~~~~~~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
2392 KB |
Output is correct |
2 |
Correct |
1 ms |
2396 KB |
Output is correct |
3 |
Correct |
23 ms |
4692 KB |
Output is correct |
4 |
Correct |
3 ms |
2396 KB |
Output is correct |
5 |
Correct |
25 ms |
4696 KB |
Output is correct |
6 |
Correct |
18 ms |
4444 KB |
Output is correct |
7 |
Correct |
20 ms |
5464 KB |
Output is correct |
8 |
Correct |
27 ms |
4444 KB |
Output is correct |
9 |
Correct |
33 ms |
6360 KB |
Output is correct |
10 |
Correct |
33 ms |
4692 KB |
Output is correct |
11 |
Correct |
27 ms |
4688 KB |
Output is correct |
12 |
Correct |
33 ms |
4700 KB |
Output is correct |
13 |
Correct |
33 ms |
4788 KB |
Output is correct |
14 |
Correct |
31 ms |
4696 KB |
Output is correct |
15 |
Correct |
33 ms |
4700 KB |
Output is correct |
16 |
Correct |
29 ms |
6020 KB |
Output is correct |
17 |
Correct |
26 ms |
5464 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
807 ms |
26424 KB |
Output is correct |
2 |
Correct |
846 ms |
26396 KB |
Output is correct |
3 |
Correct |
867 ms |
26480 KB |
Output is correct |
4 |
Correct |
888 ms |
26400 KB |
Output is correct |
5 |
Correct |
857 ms |
26648 KB |
Output is correct |
6 |
Correct |
1012 ms |
28328 KB |
Output is correct |
7 |
Correct |
1065 ms |
28272 KB |
Output is correct |
8 |
Correct |
1012 ms |
28160 KB |
Output is correct |
9 |
Correct |
39 ms |
2640 KB |
Output is correct |
10 |
Correct |
507 ms |
28424 KB |
Output is correct |
11 |
Correct |
488 ms |
28176 KB |
Output is correct |
12 |
Correct |
772 ms |
25100 KB |
Output is correct |
13 |
Correct |
705 ms |
27688 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
637 ms |
19036 KB |
Output is correct |
2 |
Correct |
397 ms |
10324 KB |
Output is correct |
3 |
Correct |
697 ms |
20840 KB |
Output is correct |
4 |
Correct |
625 ms |
19100 KB |
Output is correct |
5 |
Correct |
34 ms |
2652 KB |
Output is correct |
6 |
Correct |
665 ms |
19128 KB |
Output is correct |
7 |
Correct |
576 ms |
18908 KB |
Output is correct |
8 |
Correct |
524 ms |
18564 KB |
Output is correct |
9 |
Correct |
459 ms |
17412 KB |
Output is correct |
10 |
Correct |
426 ms |
17392 KB |
Output is correct |
11 |
Correct |
494 ms |
20164 KB |
Output is correct |
12 |
Correct |
465 ms |
20436 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1191 ms |
24936 KB |
Output is correct |
2 |
Correct |
26 ms |
2648 KB |
Output is correct |
3 |
Correct |
128 ms |
4232 KB |
Output is correct |
4 |
Correct |
57 ms |
4052 KB |
Output is correct |
5 |
Correct |
573 ms |
24932 KB |
Output is correct |
6 |
Correct |
1153 ms |
24992 KB |
Output is correct |
7 |
Correct |
579 ms |
25084 KB |
Output is correct |
8 |
Correct |
551 ms |
24188 KB |
Output is correct |
9 |
Correct |
539 ms |
24144 KB |
Output is correct |
10 |
Correct |
560 ms |
24436 KB |
Output is correct |
11 |
Correct |
869 ms |
24972 KB |
Output is correct |
12 |
Correct |
851 ms |
24988 KB |
Output is correct |
13 |
Correct |
877 ms |
25044 KB |
Output is correct |
14 |
Correct |
513 ms |
25048 KB |
Output is correct |
15 |
Correct |
543 ms |
24868 KB |
Output is correct |
16 |
Correct |
1193 ms |
25360 KB |
Output is correct |
17 |
Correct |
1197 ms |
25172 KB |
Output is correct |
18 |
Correct |
1159 ms |
25404 KB |
Output is correct |
19 |
Correct |
1176 ms |
25528 KB |
Output is correct |
20 |
Correct |
990 ms |
25216 KB |
Output is correct |
21 |
Correct |
988 ms |
25316 KB |
Output is correct |
22 |
Correct |
1146 ms |
24960 KB |
Output is correct |
23 |
Correct |
659 ms |
23052 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
807 ms |
26424 KB |
Output is correct |
2 |
Correct |
846 ms |
26396 KB |
Output is correct |
3 |
Correct |
867 ms |
26480 KB |
Output is correct |
4 |
Correct |
888 ms |
26400 KB |
Output is correct |
5 |
Correct |
857 ms |
26648 KB |
Output is correct |
6 |
Correct |
1012 ms |
28328 KB |
Output is correct |
7 |
Correct |
1065 ms |
28272 KB |
Output is correct |
8 |
Correct |
1012 ms |
28160 KB |
Output is correct |
9 |
Correct |
39 ms |
2640 KB |
Output is correct |
10 |
Correct |
507 ms |
28424 KB |
Output is correct |
11 |
Correct |
488 ms |
28176 KB |
Output is correct |
12 |
Correct |
772 ms |
25100 KB |
Output is correct |
13 |
Correct |
705 ms |
27688 KB |
Output is correct |
14 |
Correct |
637 ms |
19036 KB |
Output is correct |
15 |
Correct |
397 ms |
10324 KB |
Output is correct |
16 |
Correct |
697 ms |
20840 KB |
Output is correct |
17 |
Correct |
625 ms |
19100 KB |
Output is correct |
18 |
Correct |
34 ms |
2652 KB |
Output is correct |
19 |
Correct |
665 ms |
19128 KB |
Output is correct |
20 |
Correct |
576 ms |
18908 KB |
Output is correct |
21 |
Correct |
524 ms |
18564 KB |
Output is correct |
22 |
Correct |
459 ms |
17412 KB |
Output is correct |
23 |
Correct |
426 ms |
17392 KB |
Output is correct |
24 |
Correct |
494 ms |
20164 KB |
Output is correct |
25 |
Correct |
465 ms |
20436 KB |
Output is correct |
26 |
Correct |
884 ms |
26540 KB |
Output is correct |
27 |
Correct |
1036 ms |
28204 KB |
Output is correct |
28 |
Correct |
854 ms |
26504 KB |
Output is correct |
29 |
Correct |
679 ms |
25896 KB |
Output is correct |
30 |
Correct |
914 ms |
28068 KB |
Output is correct |
31 |
Correct |
975 ms |
28184 KB |
Output is correct |
32 |
Correct |
981 ms |
28388 KB |
Output is correct |
33 |
Correct |
892 ms |
26316 KB |
Output is correct |
34 |
Correct |
896 ms |
26404 KB |
Output is correct |
35 |
Correct |
901 ms |
26404 KB |
Output is correct |
36 |
Correct |
749 ms |
25964 KB |
Output is correct |
37 |
Correct |
766 ms |
28932 KB |
Output is correct |
38 |
Correct |
693 ms |
28720 KB |
Output is correct |
39 |
Correct |
609 ms |
27484 KB |
Output is correct |
40 |
Correct |
603 ms |
27536 KB |
Output is correct |
41 |
Correct |
609 ms |
27692 KB |
Output is correct |
42 |
Correct |
599 ms |
29228 KB |
Output is correct |
43 |
Correct |
595 ms |
29224 KB |
Output is correct |
44 |
Correct |
596 ms |
29260 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
2392 KB |
Output is correct |
2 |
Correct |
1 ms |
2396 KB |
Output is correct |
3 |
Correct |
23 ms |
4692 KB |
Output is correct |
4 |
Correct |
3 ms |
2396 KB |
Output is correct |
5 |
Correct |
25 ms |
4696 KB |
Output is correct |
6 |
Correct |
18 ms |
4444 KB |
Output is correct |
7 |
Correct |
20 ms |
5464 KB |
Output is correct |
8 |
Correct |
27 ms |
4444 KB |
Output is correct |
9 |
Correct |
33 ms |
6360 KB |
Output is correct |
10 |
Correct |
33 ms |
4692 KB |
Output is correct |
11 |
Correct |
27 ms |
4688 KB |
Output is correct |
12 |
Correct |
33 ms |
4700 KB |
Output is correct |
13 |
Correct |
33 ms |
4788 KB |
Output is correct |
14 |
Correct |
31 ms |
4696 KB |
Output is correct |
15 |
Correct |
33 ms |
4700 KB |
Output is correct |
16 |
Correct |
29 ms |
6020 KB |
Output is correct |
17 |
Correct |
26 ms |
5464 KB |
Output is correct |
18 |
Correct |
807 ms |
26424 KB |
Output is correct |
19 |
Correct |
846 ms |
26396 KB |
Output is correct |
20 |
Correct |
867 ms |
26480 KB |
Output is correct |
21 |
Correct |
888 ms |
26400 KB |
Output is correct |
22 |
Correct |
857 ms |
26648 KB |
Output is correct |
23 |
Correct |
1012 ms |
28328 KB |
Output is correct |
24 |
Correct |
1065 ms |
28272 KB |
Output is correct |
25 |
Correct |
1012 ms |
28160 KB |
Output is correct |
26 |
Correct |
39 ms |
2640 KB |
Output is correct |
27 |
Correct |
507 ms |
28424 KB |
Output is correct |
28 |
Correct |
488 ms |
28176 KB |
Output is correct |
29 |
Correct |
772 ms |
25100 KB |
Output is correct |
30 |
Correct |
705 ms |
27688 KB |
Output is correct |
31 |
Correct |
637 ms |
19036 KB |
Output is correct |
32 |
Correct |
397 ms |
10324 KB |
Output is correct |
33 |
Correct |
697 ms |
20840 KB |
Output is correct |
34 |
Correct |
625 ms |
19100 KB |
Output is correct |
35 |
Correct |
34 ms |
2652 KB |
Output is correct |
36 |
Correct |
665 ms |
19128 KB |
Output is correct |
37 |
Correct |
576 ms |
18908 KB |
Output is correct |
38 |
Correct |
524 ms |
18564 KB |
Output is correct |
39 |
Correct |
459 ms |
17412 KB |
Output is correct |
40 |
Correct |
426 ms |
17392 KB |
Output is correct |
41 |
Correct |
494 ms |
20164 KB |
Output is correct |
42 |
Correct |
465 ms |
20436 KB |
Output is correct |
43 |
Correct |
1191 ms |
24936 KB |
Output is correct |
44 |
Correct |
26 ms |
2648 KB |
Output is correct |
45 |
Correct |
128 ms |
4232 KB |
Output is correct |
46 |
Correct |
57 ms |
4052 KB |
Output is correct |
47 |
Correct |
573 ms |
24932 KB |
Output is correct |
48 |
Correct |
1153 ms |
24992 KB |
Output is correct |
49 |
Correct |
579 ms |
25084 KB |
Output is correct |
50 |
Correct |
551 ms |
24188 KB |
Output is correct |
51 |
Correct |
539 ms |
24144 KB |
Output is correct |
52 |
Correct |
560 ms |
24436 KB |
Output is correct |
53 |
Correct |
869 ms |
24972 KB |
Output is correct |
54 |
Correct |
851 ms |
24988 KB |
Output is correct |
55 |
Correct |
877 ms |
25044 KB |
Output is correct |
56 |
Correct |
513 ms |
25048 KB |
Output is correct |
57 |
Correct |
543 ms |
24868 KB |
Output is correct |
58 |
Correct |
1193 ms |
25360 KB |
Output is correct |
59 |
Correct |
1197 ms |
25172 KB |
Output is correct |
60 |
Correct |
1159 ms |
25404 KB |
Output is correct |
61 |
Correct |
1176 ms |
25528 KB |
Output is correct |
62 |
Correct |
990 ms |
25216 KB |
Output is correct |
63 |
Correct |
988 ms |
25316 KB |
Output is correct |
64 |
Correct |
1146 ms |
24960 KB |
Output is correct |
65 |
Correct |
659 ms |
23052 KB |
Output is correct |
66 |
Correct |
884 ms |
26540 KB |
Output is correct |
67 |
Correct |
1036 ms |
28204 KB |
Output is correct |
68 |
Correct |
854 ms |
26504 KB |
Output is correct |
69 |
Correct |
679 ms |
25896 KB |
Output is correct |
70 |
Correct |
914 ms |
28068 KB |
Output is correct |
71 |
Correct |
975 ms |
28184 KB |
Output is correct |
72 |
Correct |
981 ms |
28388 KB |
Output is correct |
73 |
Correct |
892 ms |
26316 KB |
Output is correct |
74 |
Correct |
896 ms |
26404 KB |
Output is correct |
75 |
Correct |
901 ms |
26404 KB |
Output is correct |
76 |
Correct |
749 ms |
25964 KB |
Output is correct |
77 |
Correct |
766 ms |
28932 KB |
Output is correct |
78 |
Correct |
693 ms |
28720 KB |
Output is correct |
79 |
Correct |
609 ms |
27484 KB |
Output is correct |
80 |
Correct |
603 ms |
27536 KB |
Output is correct |
81 |
Correct |
609 ms |
27692 KB |
Output is correct |
82 |
Correct |
599 ms |
29228 KB |
Output is correct |
83 |
Correct |
595 ms |
29224 KB |
Output is correct |
84 |
Correct |
596 ms |
29260 KB |
Output is correct |
85 |
Correct |
1429 ms |
31240 KB |
Output is correct |
86 |
Correct |
143 ms |
7956 KB |
Output is correct |
87 |
Correct |
77 ms |
9372 KB |
Output is correct |
88 |
Correct |
781 ms |
31360 KB |
Output is correct |
89 |
Correct |
1417 ms |
31576 KB |
Output is correct |
90 |
Correct |
781 ms |
31096 KB |
Output is correct |
91 |
Correct |
900 ms |
29208 KB |
Output is correct |
92 |
Correct |
893 ms |
29228 KB |
Output is correct |
93 |
Correct |
1049 ms |
30520 KB |
Output is correct |
94 |
Correct |
1172 ms |
30416 KB |
Output is correct |
95 |
Correct |
1168 ms |
30580 KB |
Output is correct |
96 |
Correct |
1218 ms |
32112 KB |
Output is correct |
97 |
Correct |
663 ms |
27744 KB |
Output is correct |
98 |
Correct |
665 ms |
31096 KB |
Output is correct |
99 |
Correct |
1458 ms |
31668 KB |
Output is correct |
100 |
Correct |
1455 ms |
31072 KB |
Output is correct |
101 |
Correct |
1461 ms |
31372 KB |
Output is correct |
102 |
Correct |
1461 ms |
31484 KB |
Output is correct |
103 |
Correct |
1331 ms |
32672 KB |
Output is correct |
104 |
Correct |
1321 ms |
32568 KB |
Output is correct |
105 |
Correct |
1129 ms |
32104 KB |
Output is correct |
106 |
Correct |
949 ms |
31916 KB |
Output is correct |
107 |
Correct |
1081 ms |
28888 KB |
Output is correct |
108 |
Correct |
1399 ms |
31176 KB |
Output is correct |
109 |
Correct |
902 ms |
29348 KB |
Output is correct |