#include <bits/stdc++.h>
using namespace std;
const int N = 50500;
const int M = N + N;
const int Q = N + N;
const int MAGIC = 800;
struct Edge {
int l, r;
int from, to, lim;
Edge(int l = 0, int r = 0, int from = 0, int to = 0, int lim = 0) :
l(l), r(r), from(from), to(to), lim(lim) {}
bool operator < (const Edge &e) const {
return lim > e.lim;
}
};
vector<Edge> es;
struct Query {
int from, cost, id;
Query(int from = 0, int cost = 0, int id = 0) :
from(from), cost(cost), id(id) {}
bool operator < (const Query &q) const {
return cost > q.cost;
}
};
vector<Query> qs;
int par[N];
int sz[N];
int find(int u) {
if (par[u] != u) {
par[u] = find(par[u]);
}
return par[u];
}
void merge(int u, int v) {
u = find(u);
v = find(v);
if (u ^ v) {
par[v] = u;
sz[u] += sz[v];
}
}
int from[M];
int to[M];
int lim[M];
int last[M];
int op[Q];
int ans[Q];
vector<int> g[N];
bool visit[N];
struct MyVector {
int sz = 0;
int a[N];
bool has[N];
void add(int u) {
if (!has[u]) {
has[u] = true;
a[++sz] = u;
}
}
void reset() {
for (int i = 1; i <= sz; ++i) {
int u = a[i];
has[u] = false;
g[u].clear();
visit[u] = false;
}
sz = 0;
}
} mv;
void dfs(int u, int &ans) {
visit[u] = true;
ans += sz[u];
for (int v : g[u]) {
if (!visit[v]) {
dfs(v, ans);
}
}
}
int main() {
int n, m;
scanf("%d %d", &n, &m);
for (int i = 1; i <= m; ++i) {
scanf("%d %d %d", from + i, to + i, lim + i);
}
int q;
scanf("%d", &q);
for (int i = 1; i <= q; ++i) {
scanf("%d", op + i);
if (op[i] == 1) {
int id, nlim;
scanf("%d %d", &id, &nlim);
es.emplace_back(last[id], i, from[id], to[id], lim[id]);
lim[id] = nlim;
last[id] = i;
} else {
int from, cost;
scanf("%d %d", &from, &cost);
qs.emplace_back(from, cost, i);
}
}
for (int i = 1; i <= m; ++i) {
if (last[i] != q) {
es.emplace_back(last[i], q + 1, from[i], to[i], lim[i]);
}
}
sort(es.begin(), es.end());
sort(qs.begin(), qs.end());
for (int l = 0; l < q + 1; l += MAGIC) {
int r = min(l + MAGIC, q + 1);
vector<Edge> all_es;
vector<Edge> cand_es;
for (auto e : es) {
if (e.l <= l && r <= e.r) {
all_es.push_back(e);
} else if (e.l < r && l < e.r) {
cand_es.push_back(e);
}
}
vector<Query> cqs;
for (auto qe : qs) {
if (l <= qe.id && qe.id < r) {
cqs.push_back(qe);
}
}
for (int i = 1; i <= n; ++i) {
par[i] = i;
sz[i] = 1;
}
int ptr = 0;
for (auto qe : cqs) {
while (ptr < all_es.size() && all_es[ptr].lim >= qe.cost) {
merge(all_es[ptr].from, all_es[ptr].to);
ptr++;
}
mv.add(find(qe.from));
for (auto e : cand_es) {
if (e.lim >= qe.cost) {
if (e.l <= qe.id && qe.id < e.r) {
int u = find(e.from);
int v = find(e.to);
mv.add(u);
mv.add(v);
g[u].push_back(v);
g[v].push_back(u);
}
} else {
break;
}
}
dfs(mv.a[1], ans[qe.id]);
mv.reset();
}
}
for (int i = 1; i <= q; ++i) if (op[i] == 2) {
printf("%d\n", ans[i]);
}
}
Compilation message
bridges.cpp: In function 'int main()':
bridges.cpp:144:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
while (ptr < all_es.size() && all_es[ptr].lim >= qe.cost) {
~~~~^~~~~~~~~~~~~~~
bridges.cpp:94:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d", &n, &m);
~~~~~^~~~~~~~~~~~~~~~~
bridges.cpp:96:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d %d", from + i, to + i, lim + i);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
bridges.cpp:99:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &q);
~~~~~^~~~~~~~~~
bridges.cpp:101:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", op + i);
~~~~~^~~~~~~~~~~~~~
bridges.cpp:104:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d", &id, &nlim);
~~~~~^~~~~~~~~~~~~~~~~~~~~
bridges.cpp:110:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d", &from, &cost);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
1536 KB |
Output is correct |
2 |
Correct |
3 ms |
1536 KB |
Output is correct |
3 |
Correct |
24 ms |
2048 KB |
Output is correct |
4 |
Correct |
8 ms |
1856 KB |
Output is correct |
5 |
Correct |
17 ms |
1920 KB |
Output is correct |
6 |
Correct |
13 ms |
1920 KB |
Output is correct |
7 |
Correct |
17 ms |
1920 KB |
Output is correct |
8 |
Correct |
18 ms |
1920 KB |
Output is correct |
9 |
Correct |
22 ms |
1920 KB |
Output is correct |
10 |
Correct |
18 ms |
1920 KB |
Output is correct |
11 |
Correct |
17 ms |
1920 KB |
Output is correct |
12 |
Correct |
20 ms |
1920 KB |
Output is correct |
13 |
Correct |
23 ms |
2040 KB |
Output is correct |
14 |
Correct |
20 ms |
2048 KB |
Output is correct |
15 |
Correct |
20 ms |
2048 KB |
Output is correct |
16 |
Correct |
17 ms |
2032 KB |
Output is correct |
17 |
Correct |
17 ms |
2048 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
943 ms |
9928 KB |
Output is correct |
2 |
Correct |
1024 ms |
10036 KB |
Output is correct |
3 |
Correct |
980 ms |
9984 KB |
Output is correct |
4 |
Correct |
910 ms |
10000 KB |
Output is correct |
5 |
Correct |
950 ms |
9876 KB |
Output is correct |
6 |
Correct |
1536 ms |
9628 KB |
Output is correct |
7 |
Correct |
1409 ms |
9748 KB |
Output is correct |
8 |
Correct |
1351 ms |
9720 KB |
Output is correct |
9 |
Correct |
94 ms |
3820 KB |
Output is correct |
10 |
Correct |
1162 ms |
9896 KB |
Output is correct |
11 |
Correct |
1036 ms |
10028 KB |
Output is correct |
12 |
Correct |
632 ms |
8540 KB |
Output is correct |
13 |
Correct |
757 ms |
10452 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
726 ms |
7852 KB |
Output is correct |
2 |
Correct |
571 ms |
5032 KB |
Output is correct |
3 |
Correct |
803 ms |
7808 KB |
Output is correct |
4 |
Correct |
803 ms |
7808 KB |
Output is correct |
5 |
Correct |
91 ms |
3816 KB |
Output is correct |
6 |
Correct |
754 ms |
7828 KB |
Output is correct |
7 |
Correct |
605 ms |
7700 KB |
Output is correct |
8 |
Correct |
512 ms |
7736 KB |
Output is correct |
9 |
Correct |
342 ms |
7156 KB |
Output is correct |
10 |
Correct |
311 ms |
6932 KB |
Output is correct |
11 |
Correct |
487 ms |
8136 KB |
Output is correct |
12 |
Correct |
450 ms |
8048 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1198 ms |
11848 KB |
Output is correct |
2 |
Correct |
90 ms |
3816 KB |
Output is correct |
3 |
Correct |
96 ms |
9504 KB |
Output is correct |
4 |
Correct |
87 ms |
9524 KB |
Output is correct |
5 |
Correct |
1157 ms |
12000 KB |
Output is correct |
6 |
Correct |
1210 ms |
11996 KB |
Output is correct |
7 |
Correct |
1218 ms |
12020 KB |
Output is correct |
8 |
Correct |
479 ms |
7964 KB |
Output is correct |
9 |
Correct |
463 ms |
7976 KB |
Output is correct |
10 |
Correct |
450 ms |
8028 KB |
Output is correct |
11 |
Correct |
869 ms |
10472 KB |
Output is correct |
12 |
Correct |
792 ms |
10812 KB |
Output is correct |
13 |
Correct |
814 ms |
10756 KB |
Output is correct |
14 |
Correct |
1257 ms |
11912 KB |
Output is correct |
15 |
Correct |
1100 ms |
11956 KB |
Output is correct |
16 |
Correct |
1161 ms |
11888 KB |
Output is correct |
17 |
Correct |
1163 ms |
12056 KB |
Output is correct |
18 |
Correct |
1158 ms |
11924 KB |
Output is correct |
19 |
Correct |
1164 ms |
11816 KB |
Output is correct |
20 |
Correct |
984 ms |
11172 KB |
Output is correct |
21 |
Correct |
912 ms |
11176 KB |
Output is correct |
22 |
Correct |
1181 ms |
11676 KB |
Output is correct |
23 |
Correct |
940 ms |
10824 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
943 ms |
9928 KB |
Output is correct |
2 |
Correct |
1024 ms |
10036 KB |
Output is correct |
3 |
Correct |
980 ms |
9984 KB |
Output is correct |
4 |
Correct |
910 ms |
10000 KB |
Output is correct |
5 |
Correct |
950 ms |
9876 KB |
Output is correct |
6 |
Correct |
1536 ms |
9628 KB |
Output is correct |
7 |
Correct |
1409 ms |
9748 KB |
Output is correct |
8 |
Correct |
1351 ms |
9720 KB |
Output is correct |
9 |
Correct |
94 ms |
3820 KB |
Output is correct |
10 |
Correct |
1162 ms |
9896 KB |
Output is correct |
11 |
Correct |
1036 ms |
10028 KB |
Output is correct |
12 |
Correct |
632 ms |
8540 KB |
Output is correct |
13 |
Correct |
757 ms |
10452 KB |
Output is correct |
14 |
Correct |
726 ms |
7852 KB |
Output is correct |
15 |
Correct |
571 ms |
5032 KB |
Output is correct |
16 |
Correct |
803 ms |
7808 KB |
Output is correct |
17 |
Correct |
803 ms |
7808 KB |
Output is correct |
18 |
Correct |
91 ms |
3816 KB |
Output is correct |
19 |
Correct |
754 ms |
7828 KB |
Output is correct |
20 |
Correct |
605 ms |
7700 KB |
Output is correct |
21 |
Correct |
512 ms |
7736 KB |
Output is correct |
22 |
Correct |
342 ms |
7156 KB |
Output is correct |
23 |
Correct |
311 ms |
6932 KB |
Output is correct |
24 |
Correct |
487 ms |
8136 KB |
Output is correct |
25 |
Correct |
450 ms |
8048 KB |
Output is correct |
26 |
Correct |
987 ms |
9876 KB |
Output is correct |
27 |
Correct |
1476 ms |
13032 KB |
Output is correct |
28 |
Correct |
1448 ms |
18608 KB |
Output is correct |
29 |
Correct |
976 ms |
12952 KB |
Output is correct |
30 |
Correct |
1543 ms |
9928 KB |
Output is correct |
31 |
Correct |
1541 ms |
10156 KB |
Output is correct |
32 |
Correct |
1481 ms |
9904 KB |
Output is correct |
33 |
Correct |
1202 ms |
10112 KB |
Output is correct |
34 |
Correct |
1284 ms |
9968 KB |
Output is correct |
35 |
Correct |
1323 ms |
10012 KB |
Output is correct |
36 |
Correct |
930 ms |
10072 KB |
Output is correct |
37 |
Correct |
913 ms |
9956 KB |
Output is correct |
38 |
Correct |
894 ms |
10008 KB |
Output is correct |
39 |
Correct |
617 ms |
9016 KB |
Output is correct |
40 |
Correct |
655 ms |
9040 KB |
Output is correct |
41 |
Correct |
649 ms |
9068 KB |
Output is correct |
42 |
Correct |
616 ms |
10548 KB |
Output is correct |
43 |
Correct |
638 ms |
10600 KB |
Output is correct |
44 |
Correct |
626 ms |
10564 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
1536 KB |
Output is correct |
2 |
Correct |
3 ms |
1536 KB |
Output is correct |
3 |
Correct |
24 ms |
2048 KB |
Output is correct |
4 |
Correct |
8 ms |
1856 KB |
Output is correct |
5 |
Correct |
17 ms |
1920 KB |
Output is correct |
6 |
Correct |
13 ms |
1920 KB |
Output is correct |
7 |
Correct |
17 ms |
1920 KB |
Output is correct |
8 |
Correct |
18 ms |
1920 KB |
Output is correct |
9 |
Correct |
22 ms |
1920 KB |
Output is correct |
10 |
Correct |
18 ms |
1920 KB |
Output is correct |
11 |
Correct |
17 ms |
1920 KB |
Output is correct |
12 |
Correct |
20 ms |
1920 KB |
Output is correct |
13 |
Correct |
23 ms |
2040 KB |
Output is correct |
14 |
Correct |
20 ms |
2048 KB |
Output is correct |
15 |
Correct |
20 ms |
2048 KB |
Output is correct |
16 |
Correct |
17 ms |
2032 KB |
Output is correct |
17 |
Correct |
17 ms |
2048 KB |
Output is correct |
18 |
Correct |
943 ms |
9928 KB |
Output is correct |
19 |
Correct |
1024 ms |
10036 KB |
Output is correct |
20 |
Correct |
980 ms |
9984 KB |
Output is correct |
21 |
Correct |
910 ms |
10000 KB |
Output is correct |
22 |
Correct |
950 ms |
9876 KB |
Output is correct |
23 |
Correct |
1536 ms |
9628 KB |
Output is correct |
24 |
Correct |
1409 ms |
9748 KB |
Output is correct |
25 |
Correct |
1351 ms |
9720 KB |
Output is correct |
26 |
Correct |
94 ms |
3820 KB |
Output is correct |
27 |
Correct |
1162 ms |
9896 KB |
Output is correct |
28 |
Correct |
1036 ms |
10028 KB |
Output is correct |
29 |
Correct |
632 ms |
8540 KB |
Output is correct |
30 |
Correct |
757 ms |
10452 KB |
Output is correct |
31 |
Correct |
726 ms |
7852 KB |
Output is correct |
32 |
Correct |
571 ms |
5032 KB |
Output is correct |
33 |
Correct |
803 ms |
7808 KB |
Output is correct |
34 |
Correct |
803 ms |
7808 KB |
Output is correct |
35 |
Correct |
91 ms |
3816 KB |
Output is correct |
36 |
Correct |
754 ms |
7828 KB |
Output is correct |
37 |
Correct |
605 ms |
7700 KB |
Output is correct |
38 |
Correct |
512 ms |
7736 KB |
Output is correct |
39 |
Correct |
342 ms |
7156 KB |
Output is correct |
40 |
Correct |
311 ms |
6932 KB |
Output is correct |
41 |
Correct |
487 ms |
8136 KB |
Output is correct |
42 |
Correct |
450 ms |
8048 KB |
Output is correct |
43 |
Correct |
1198 ms |
11848 KB |
Output is correct |
44 |
Correct |
90 ms |
3816 KB |
Output is correct |
45 |
Correct |
96 ms |
9504 KB |
Output is correct |
46 |
Correct |
87 ms |
9524 KB |
Output is correct |
47 |
Correct |
1157 ms |
12000 KB |
Output is correct |
48 |
Correct |
1210 ms |
11996 KB |
Output is correct |
49 |
Correct |
1218 ms |
12020 KB |
Output is correct |
50 |
Correct |
479 ms |
7964 KB |
Output is correct |
51 |
Correct |
463 ms |
7976 KB |
Output is correct |
52 |
Correct |
450 ms |
8028 KB |
Output is correct |
53 |
Correct |
869 ms |
10472 KB |
Output is correct |
54 |
Correct |
792 ms |
10812 KB |
Output is correct |
55 |
Correct |
814 ms |
10756 KB |
Output is correct |
56 |
Correct |
1257 ms |
11912 KB |
Output is correct |
57 |
Correct |
1100 ms |
11956 KB |
Output is correct |
58 |
Correct |
1161 ms |
11888 KB |
Output is correct |
59 |
Correct |
1163 ms |
12056 KB |
Output is correct |
60 |
Correct |
1158 ms |
11924 KB |
Output is correct |
61 |
Correct |
1164 ms |
11816 KB |
Output is correct |
62 |
Correct |
984 ms |
11172 KB |
Output is correct |
63 |
Correct |
912 ms |
11176 KB |
Output is correct |
64 |
Correct |
1181 ms |
11676 KB |
Output is correct |
65 |
Correct |
940 ms |
10824 KB |
Output is correct |
66 |
Correct |
987 ms |
9876 KB |
Output is correct |
67 |
Correct |
1476 ms |
13032 KB |
Output is correct |
68 |
Correct |
1448 ms |
18608 KB |
Output is correct |
69 |
Correct |
976 ms |
12952 KB |
Output is correct |
70 |
Correct |
1543 ms |
9928 KB |
Output is correct |
71 |
Correct |
1541 ms |
10156 KB |
Output is correct |
72 |
Correct |
1481 ms |
9904 KB |
Output is correct |
73 |
Correct |
1202 ms |
10112 KB |
Output is correct |
74 |
Correct |
1284 ms |
9968 KB |
Output is correct |
75 |
Correct |
1323 ms |
10012 KB |
Output is correct |
76 |
Correct |
930 ms |
10072 KB |
Output is correct |
77 |
Correct |
913 ms |
9956 KB |
Output is correct |
78 |
Correct |
894 ms |
10008 KB |
Output is correct |
79 |
Correct |
617 ms |
9016 KB |
Output is correct |
80 |
Correct |
655 ms |
9040 KB |
Output is correct |
81 |
Correct |
649 ms |
9068 KB |
Output is correct |
82 |
Correct |
616 ms |
10548 KB |
Output is correct |
83 |
Correct |
638 ms |
10600 KB |
Output is correct |
84 |
Correct |
626 ms |
10564 KB |
Output is correct |
85 |
Correct |
1566 ms |
31304 KB |
Output is correct |
86 |
Correct |
111 ms |
10920 KB |
Output is correct |
87 |
Correct |
120 ms |
11088 KB |
Output is correct |
88 |
Correct |
1531 ms |
14492 KB |
Output is correct |
89 |
Correct |
1551 ms |
31868 KB |
Output is correct |
90 |
Correct |
1504 ms |
14176 KB |
Output is correct |
91 |
Correct |
1257 ms |
11024 KB |
Output is correct |
92 |
Correct |
1235 ms |
10924 KB |
Output is correct |
93 |
Correct |
1605 ms |
10288 KB |
Output is correct |
94 |
Correct |
1441 ms |
14036 KB |
Output is correct |
95 |
Correct |
1457 ms |
14488 KB |
Output is correct |
96 |
Correct |
1346 ms |
12860 KB |
Output is correct |
97 |
Correct |
1226 ms |
13336 KB |
Output is correct |
98 |
Correct |
1405 ms |
14536 KB |
Output is correct |
99 |
Correct |
1600 ms |
30488 KB |
Output is correct |
100 |
Correct |
1556 ms |
30212 KB |
Output is correct |
101 |
Correct |
1613 ms |
25608 KB |
Output is correct |
102 |
Correct |
1614 ms |
25948 KB |
Output is correct |
103 |
Correct |
1369 ms |
12700 KB |
Output is correct |
104 |
Correct |
1605 ms |
12680 KB |
Output is correct |
105 |
Correct |
1203 ms |
13300 KB |
Output is correct |
106 |
Correct |
1088 ms |
13332 KB |
Output is correct |
107 |
Correct |
1109 ms |
12056 KB |
Output is correct |
108 |
Correct |
1749 ms |
24428 KB |
Output is correct |
109 |
Correct |
1382 ms |
12308 KB |
Output is correct |