#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define sp ' '
#define en '\n'
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
using namespace std;
const int N = 5e4 + 2;
const int M = 1e5 + 2;
const int S = 1500;
const int inf = 2e9;
struct Dsu {
int link[N], sz[N];
void Init(int n) {
for (int i = 1; i <= n; i++) {
link[i] = i;
sz[i] = 1;
}
}
int Find(int x) {
if (x == link[x]) return x;
return Find(link[x]);
}
stack<array<int, 4>> s;
void Unite(int x, int y) {
x = Find(x); y = Find(y);
if (sz[x] < sz[y]) swap(x, y);
s.push({x, y, sz[x], sz[y]});
if (x == y) return;
sz[x] += sz[y];
link[y] = x;
}
void RollBack() {
auto aa = s.top(); s.pop();
link[aa[0]] = aa[0];
link[aa[1]] = aa[1];
sz[aa[0]] = aa[2];
sz[aa[1]] = aa[3];
}
}dsu;
int a[M], b[M], c[M], is[M];
int t[M], x[M], y[M], ans[M];
vector<int> qq[S];
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
int n, m;
cin >> n >> m;
for (int i = 1; i <= m; i++) {
cin >> a[i] >> b[i] >> c[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 += S) {
int r = min(l + S - 1, q);
for (int i = l; i <= r; i++) qq[i - l].clear();
for (int i = 1; i <= m; i++) is[i] = 0;
vector<int> cx, cy, v;
for (int i = l; i <= r; i++) {
if (t[i] == 1) {
if (is[x[i]] == 0) cx.push_back(x[i]);
is[x[i]] = 1;
}
}
for (int i = l; i <= r; i++) {
if (t[i] == 1) c[x[i]] = y[i];
else {
for (int j : cx) if (c[j] >= y[i]) qq[i - l].push_back(j);
v.push_back(i);
}
}
for (int i = 1; i <= m; i++) if (!is[i]) cy.push_back(i);
sort(cy.begin(), cy.end(), [&] (int i, int j) {
return c[i] > c[j];
});
sort(v.begin(), v.end(), [&] (int i, int j) {
return y[i] > y[j];
});
dsu.Init(n);
int j = 0;
for (int i : v) {
while (j < cy.size() && c[cy[j]] >= y[i]) {
dsu.Unite(a[cy[j]], b[cy[j]]);
j += 1;
}
for (auto o : qq[i - l]) dsu.Unite(a[o], b[o]);
ans[i] = dsu.sz[dsu.Find(x[i])];
for (int j = 0; j < qq[i - l].size(); j++) dsu.RollBack();
}
}
for (int i = 1; i <= q; i++)
if (t[i] == 2)
cout << ans[i] << en;
return 0;
}
Compilation message
bridges.cpp: In function 'int main()':
bridges.cpp:86:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
86 | while (j < cy.size() && c[cy[j]] >= y[i]) {
| ~~^~~~~~~~~~~
bridges.cpp:92:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
92 | for (int j = 0; j < qq[i - l].size(); j++) dsu.RollBack();
| ~~^~~~~~~~~~~~~~~~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
340 KB |
Output is correct |
2 |
Correct |
0 ms |
340 KB |
Output is correct |
3 |
Correct |
45 ms |
3660 KB |
Output is correct |
4 |
Correct |
4 ms |
468 KB |
Output is correct |
5 |
Correct |
16 ms |
1236 KB |
Output is correct |
6 |
Correct |
11 ms |
1108 KB |
Output is correct |
7 |
Correct |
12 ms |
1292 KB |
Output is correct |
8 |
Correct |
13 ms |
1244 KB |
Output is correct |
9 |
Correct |
14 ms |
1284 KB |
Output is correct |
10 |
Correct |
12 ms |
1184 KB |
Output is correct |
11 |
Correct |
12 ms |
1176 KB |
Output is correct |
12 |
Correct |
13 ms |
1236 KB |
Output is correct |
13 |
Correct |
17 ms |
1748 KB |
Output is correct |
14 |
Correct |
16 ms |
1492 KB |
Output is correct |
15 |
Correct |
14 ms |
1236 KB |
Output is correct |
16 |
Correct |
12 ms |
1236 KB |
Output is correct |
17 |
Correct |
12 ms |
1440 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1341 ms |
63668 KB |
Output is correct |
2 |
Correct |
1336 ms |
63764 KB |
Output is correct |
3 |
Correct |
1327 ms |
63844 KB |
Output is correct |
4 |
Correct |
1417 ms |
63740 KB |
Output is correct |
5 |
Correct |
1408 ms |
63980 KB |
Output is correct |
6 |
Correct |
2166 ms |
63732 KB |
Output is correct |
7 |
Correct |
2194 ms |
63716 KB |
Output is correct |
8 |
Correct |
2189 ms |
63780 KB |
Output is correct |
9 |
Correct |
39 ms |
2068 KB |
Output is correct |
10 |
Correct |
1318 ms |
63784 KB |
Output is correct |
11 |
Correct |
1195 ms |
63900 KB |
Output is correct |
12 |
Correct |
1064 ms |
60236 KB |
Output is correct |
13 |
Correct |
1097 ms |
69060 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1118 ms |
44340 KB |
Output is correct |
2 |
Correct |
992 ms |
16724 KB |
Output is correct |
3 |
Correct |
1407 ms |
44448 KB |
Output is correct |
4 |
Correct |
1086 ms |
44352 KB |
Output is correct |
5 |
Correct |
31 ms |
2084 KB |
Output is correct |
6 |
Correct |
1314 ms |
44348 KB |
Output is correct |
7 |
Correct |
980 ms |
44428 KB |
Output is correct |
8 |
Correct |
818 ms |
44360 KB |
Output is correct |
9 |
Correct |
618 ms |
40568 KB |
Output is correct |
10 |
Correct |
537 ms |
40456 KB |
Output is correct |
11 |
Correct |
695 ms |
48780 KB |
Output is correct |
12 |
Correct |
575 ms |
47176 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
994 ms |
114452 KB |
Output is correct |
2 |
Correct |
33 ms |
2380 KB |
Output is correct |
3 |
Correct |
112 ms |
14108 KB |
Output is correct |
4 |
Correct |
61 ms |
14120 KB |
Output is correct |
5 |
Correct |
560 ms |
114876 KB |
Output is correct |
6 |
Correct |
943 ms |
114728 KB |
Output is correct |
7 |
Correct |
550 ms |
114888 KB |
Output is correct |
8 |
Correct |
479 ms |
58632 KB |
Output is correct |
9 |
Correct |
491 ms |
58616 KB |
Output is correct |
10 |
Correct |
497 ms |
58792 KB |
Output is correct |
11 |
Correct |
725 ms |
86684 KB |
Output is correct |
12 |
Correct |
718 ms |
86688 KB |
Output is correct |
13 |
Correct |
758 ms |
86952 KB |
Output is correct |
14 |
Correct |
479 ms |
114884 KB |
Output is correct |
15 |
Correct |
484 ms |
114820 KB |
Output is correct |
16 |
Correct |
977 ms |
113712 KB |
Output is correct |
17 |
Correct |
989 ms |
113608 KB |
Output is correct |
18 |
Correct |
961 ms |
114004 KB |
Output is correct |
19 |
Correct |
988 ms |
113812 KB |
Output is correct |
20 |
Correct |
818 ms |
96232 KB |
Output is correct |
21 |
Correct |
813 ms |
96260 KB |
Output is correct |
22 |
Correct |
930 ms |
109408 KB |
Output is correct |
23 |
Correct |
579 ms |
92904 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1341 ms |
63668 KB |
Output is correct |
2 |
Correct |
1336 ms |
63764 KB |
Output is correct |
3 |
Correct |
1327 ms |
63844 KB |
Output is correct |
4 |
Correct |
1417 ms |
63740 KB |
Output is correct |
5 |
Correct |
1408 ms |
63980 KB |
Output is correct |
6 |
Correct |
2166 ms |
63732 KB |
Output is correct |
7 |
Correct |
2194 ms |
63716 KB |
Output is correct |
8 |
Correct |
2189 ms |
63780 KB |
Output is correct |
9 |
Correct |
39 ms |
2068 KB |
Output is correct |
10 |
Correct |
1318 ms |
63784 KB |
Output is correct |
11 |
Correct |
1195 ms |
63900 KB |
Output is correct |
12 |
Correct |
1064 ms |
60236 KB |
Output is correct |
13 |
Correct |
1097 ms |
69060 KB |
Output is correct |
14 |
Correct |
1118 ms |
44340 KB |
Output is correct |
15 |
Correct |
992 ms |
16724 KB |
Output is correct |
16 |
Correct |
1407 ms |
44448 KB |
Output is correct |
17 |
Correct |
1086 ms |
44352 KB |
Output is correct |
18 |
Correct |
31 ms |
2084 KB |
Output is correct |
19 |
Correct |
1314 ms |
44348 KB |
Output is correct |
20 |
Correct |
980 ms |
44428 KB |
Output is correct |
21 |
Correct |
818 ms |
44360 KB |
Output is correct |
22 |
Correct |
618 ms |
40568 KB |
Output is correct |
23 |
Correct |
537 ms |
40456 KB |
Output is correct |
24 |
Correct |
695 ms |
48780 KB |
Output is correct |
25 |
Correct |
575 ms |
47176 KB |
Output is correct |
26 |
Correct |
1329 ms |
63744 KB |
Output is correct |
27 |
Correct |
1784 ms |
63896 KB |
Output is correct |
28 |
Correct |
1389 ms |
63740 KB |
Output is correct |
29 |
Correct |
821 ms |
63320 KB |
Output is correct |
30 |
Correct |
1657 ms |
63896 KB |
Output is correct |
31 |
Correct |
1720 ms |
63808 KB |
Output is correct |
32 |
Correct |
1758 ms |
63768 KB |
Output is correct |
33 |
Correct |
1397 ms |
63744 KB |
Output is correct |
34 |
Correct |
1382 ms |
63696 KB |
Output is correct |
35 |
Correct |
1399 ms |
63732 KB |
Output is correct |
36 |
Correct |
907 ms |
63520 KB |
Output is correct |
37 |
Correct |
896 ms |
63416 KB |
Output is correct |
38 |
Correct |
863 ms |
63428 KB |
Output is correct |
39 |
Correct |
623 ms |
59680 KB |
Output is correct |
40 |
Correct |
627 ms |
59724 KB |
Output is correct |
41 |
Correct |
620 ms |
59764 KB |
Output is correct |
42 |
Correct |
635 ms |
63368 KB |
Output is correct |
43 |
Correct |
624 ms |
63500 KB |
Output is correct |
44 |
Correct |
619 ms |
62928 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
340 KB |
Output is correct |
2 |
Correct |
0 ms |
340 KB |
Output is correct |
3 |
Correct |
45 ms |
3660 KB |
Output is correct |
4 |
Correct |
4 ms |
468 KB |
Output is correct |
5 |
Correct |
16 ms |
1236 KB |
Output is correct |
6 |
Correct |
11 ms |
1108 KB |
Output is correct |
7 |
Correct |
12 ms |
1292 KB |
Output is correct |
8 |
Correct |
13 ms |
1244 KB |
Output is correct |
9 |
Correct |
14 ms |
1284 KB |
Output is correct |
10 |
Correct |
12 ms |
1184 KB |
Output is correct |
11 |
Correct |
12 ms |
1176 KB |
Output is correct |
12 |
Correct |
13 ms |
1236 KB |
Output is correct |
13 |
Correct |
17 ms |
1748 KB |
Output is correct |
14 |
Correct |
16 ms |
1492 KB |
Output is correct |
15 |
Correct |
14 ms |
1236 KB |
Output is correct |
16 |
Correct |
12 ms |
1236 KB |
Output is correct |
17 |
Correct |
12 ms |
1440 KB |
Output is correct |
18 |
Correct |
1341 ms |
63668 KB |
Output is correct |
19 |
Correct |
1336 ms |
63764 KB |
Output is correct |
20 |
Correct |
1327 ms |
63844 KB |
Output is correct |
21 |
Correct |
1417 ms |
63740 KB |
Output is correct |
22 |
Correct |
1408 ms |
63980 KB |
Output is correct |
23 |
Correct |
2166 ms |
63732 KB |
Output is correct |
24 |
Correct |
2194 ms |
63716 KB |
Output is correct |
25 |
Correct |
2189 ms |
63780 KB |
Output is correct |
26 |
Correct |
39 ms |
2068 KB |
Output is correct |
27 |
Correct |
1318 ms |
63784 KB |
Output is correct |
28 |
Correct |
1195 ms |
63900 KB |
Output is correct |
29 |
Correct |
1064 ms |
60236 KB |
Output is correct |
30 |
Correct |
1097 ms |
69060 KB |
Output is correct |
31 |
Correct |
1118 ms |
44340 KB |
Output is correct |
32 |
Correct |
992 ms |
16724 KB |
Output is correct |
33 |
Correct |
1407 ms |
44448 KB |
Output is correct |
34 |
Correct |
1086 ms |
44352 KB |
Output is correct |
35 |
Correct |
31 ms |
2084 KB |
Output is correct |
36 |
Correct |
1314 ms |
44348 KB |
Output is correct |
37 |
Correct |
980 ms |
44428 KB |
Output is correct |
38 |
Correct |
818 ms |
44360 KB |
Output is correct |
39 |
Correct |
618 ms |
40568 KB |
Output is correct |
40 |
Correct |
537 ms |
40456 KB |
Output is correct |
41 |
Correct |
695 ms |
48780 KB |
Output is correct |
42 |
Correct |
575 ms |
47176 KB |
Output is correct |
43 |
Correct |
994 ms |
114452 KB |
Output is correct |
44 |
Correct |
33 ms |
2380 KB |
Output is correct |
45 |
Correct |
112 ms |
14108 KB |
Output is correct |
46 |
Correct |
61 ms |
14120 KB |
Output is correct |
47 |
Correct |
560 ms |
114876 KB |
Output is correct |
48 |
Correct |
943 ms |
114728 KB |
Output is correct |
49 |
Correct |
550 ms |
114888 KB |
Output is correct |
50 |
Correct |
479 ms |
58632 KB |
Output is correct |
51 |
Correct |
491 ms |
58616 KB |
Output is correct |
52 |
Correct |
497 ms |
58792 KB |
Output is correct |
53 |
Correct |
725 ms |
86684 KB |
Output is correct |
54 |
Correct |
718 ms |
86688 KB |
Output is correct |
55 |
Correct |
758 ms |
86952 KB |
Output is correct |
56 |
Correct |
479 ms |
114884 KB |
Output is correct |
57 |
Correct |
484 ms |
114820 KB |
Output is correct |
58 |
Correct |
977 ms |
113712 KB |
Output is correct |
59 |
Correct |
989 ms |
113608 KB |
Output is correct |
60 |
Correct |
961 ms |
114004 KB |
Output is correct |
61 |
Correct |
988 ms |
113812 KB |
Output is correct |
62 |
Correct |
818 ms |
96232 KB |
Output is correct |
63 |
Correct |
813 ms |
96260 KB |
Output is correct |
64 |
Correct |
930 ms |
109408 KB |
Output is correct |
65 |
Correct |
579 ms |
92904 KB |
Output is correct |
66 |
Correct |
1329 ms |
63744 KB |
Output is correct |
67 |
Correct |
1784 ms |
63896 KB |
Output is correct |
68 |
Correct |
1389 ms |
63740 KB |
Output is correct |
69 |
Correct |
821 ms |
63320 KB |
Output is correct |
70 |
Correct |
1657 ms |
63896 KB |
Output is correct |
71 |
Correct |
1720 ms |
63808 KB |
Output is correct |
72 |
Correct |
1758 ms |
63768 KB |
Output is correct |
73 |
Correct |
1397 ms |
63744 KB |
Output is correct |
74 |
Correct |
1382 ms |
63696 KB |
Output is correct |
75 |
Correct |
1399 ms |
63732 KB |
Output is correct |
76 |
Correct |
907 ms |
63520 KB |
Output is correct |
77 |
Correct |
896 ms |
63416 KB |
Output is correct |
78 |
Correct |
863 ms |
63428 KB |
Output is correct |
79 |
Correct |
623 ms |
59680 KB |
Output is correct |
80 |
Correct |
627 ms |
59724 KB |
Output is correct |
81 |
Correct |
620 ms |
59764 KB |
Output is correct |
82 |
Correct |
635 ms |
63368 KB |
Output is correct |
83 |
Correct |
624 ms |
63500 KB |
Output is correct |
84 |
Correct |
619 ms |
62928 KB |
Output is correct |
85 |
Correct |
1771 ms |
123500 KB |
Output is correct |
86 |
Correct |
181 ms |
20644 KB |
Output is correct |
87 |
Correct |
159 ms |
21652 KB |
Output is correct |
88 |
Correct |
1275 ms |
122004 KB |
Output is correct |
89 |
Correct |
1765 ms |
123472 KB |
Output is correct |
90 |
Correct |
1297 ms |
122196 KB |
Output is correct |
91 |
Correct |
1477 ms |
66396 KB |
Output is correct |
92 |
Correct |
1423 ms |
66532 KB |
Output is correct |
93 |
Correct |
2384 ms |
66168 KB |
Output is correct |
94 |
Correct |
1697 ms |
94740 KB |
Output is correct |
95 |
Correct |
1616 ms |
94940 KB |
Output is correct |
96 |
Correct |
2300 ms |
94796 KB |
Output is correct |
97 |
Correct |
749 ms |
118476 KB |
Output is correct |
98 |
Correct |
840 ms |
126620 KB |
Output is correct |
99 |
Correct |
1845 ms |
122548 KB |
Output is correct |
100 |
Correct |
1798 ms |
122220 KB |
Output is correct |
101 |
Correct |
1894 ms |
122676 KB |
Output is correct |
102 |
Correct |
1872 ms |
122520 KB |
Output is correct |
103 |
Correct |
2493 ms |
104196 KB |
Output is correct |
104 |
Correct |
2507 ms |
104252 KB |
Output is correct |
105 |
Correct |
1474 ms |
109440 KB |
Output is correct |
106 |
Correct |
1056 ms |
99472 KB |
Output is correct |
107 |
Correct |
1276 ms |
100644 KB |
Output is correct |
108 |
Correct |
2129 ms |
117672 KB |
Output is correct |
109 |
Correct |
1778 ms |
99496 KB |
Output is correct |