#include<bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define pb push_back
const int N = (int)5e4 + 5, M = (int)1e5 + 5, Q = M, NGU = 320;
int n, m, q, ans[Q], nE, nVec, contain[N], nContain, lst[M];
vector<int> gr[N];
bool vis[N];
struct Edge {
int u, v, d;
Edge (int _u = 0, int _v = 0, int _d = 0) : u(_u), v(_v), d(_d) {}
bool operator< (const Edge &_) const { return d > _.d; }
} edge[M], edge_[M], e[M];
vector< pair<Edge, pair<int, int> > > vecEdge;
struct Query {
int t, id, r;
Query (int _t = 0, int _id = 0, int _r = 0) : t(_t), id(_id), r(_r) {}
bool operator< (const Query &_) const { return r > _.r; }
} query[Q];
pair<Query, int> vec[NGU + 5];
struct Dsu {
int pSet[N], szSet[N];
void init () {
for (int i = 1; i <= n; ++i) pSet[i] = i, szSet[i] = 1;
}
int findSet (int i) { return i == pSet[i] ? i : pSet[i] = findSet(pSet[i]); }
void unionSet (int i, int j) {
i = findSet(i); j = findSet(j);
if (i == j) return ;
if (szSet[i] > szSet[j]) swap(i, j);
szSet[j] += szSet[i];
pSet[i] = j;
}
} dsu;
void dfs (int u) {
if (vis[u]) return ;
vis[u] = 1; contain[nContain++] = u;
for (int v : gr[u]) dfs(v);
}
int main () {
// freopen("test.INP", "r", stdin);
scanf("%d %d", &n, &m);
memset(lst, -1, sizeof lst);
for (int i = 1; i <= m; ++i) {
int u, v, d; scanf("%d %d %d", &u, &v, &d);
edge_[i] = edge[i] = Edge(u, v, d);
vecEdge.pb( { edge[i], { i, -1 } } );
}
scanf("%d", &q);
for (int i = 1; i <= q; ++i) {
int t, id, r; scanf("%d %d %d", &t, &id, &r);
query[i] = Query(t, id, r);
if (t == 1) {
vecEdge.pb( { Edge(edge[id].u, edge[id].v, r), { id, i } } );
}
}
sort(vecEdge.begin(), vecEdge.end() );
for (int i = 1; i <= q; i += NGU) {
dsu.init();
nVec = 0;
vector<bool> exist(M);
for (int j = i; j <= min(q, i + NGU - 1); ++j) {
if (query[j].t == 2) vec[nVec++] = { query[j], j };
else exist[ query[j].id ] = 1;
}
sort(vec, vec + nVec);
nE = 0;
for (auto _ : vecEdge) if (!exist[_.se.fi] && lst[_.se.fi] == _.se.se) e[nE++] = _.fi;
int iE = 0;
for (int _j = 0; _j < nVec; ++_j) {
auto _ = vec[_j];
Query _query = _.fi;
for (; iE < nE && e[iE].d >= _query.r; ++iE) dsu.unionSet(e[iE].u, e[iE].v);
for (int j = i; j <= _.se; ++j) if (query[j].t == 1) edge_[ query[j].id ].d = query[j].r;
for (int j = i; j <= min(q, i + NGU - 1); ++j) if (query[j].t == 1 && edge_[ query[j].id ].d >= _query.r) {
gr[ dsu.findSet(edge[ query[j].id ].u) ].pb(dsu.findSet(edge[ query[j].id ].v) );
gr[ dsu.findSet(edge[ query[j].id ].v) ].pb(dsu.findSet(edge[ query[j].id ].u) );
}
dfs(dsu.findSet(_query.id) );
for (int _k = 0; _k < nContain; ++_k) {
int __ = contain[_k];
ans[_.se] += dsu.szSet[__];
vis[__] = 0;
}
nContain = 0;
for (int j = i; j <= min(q, i + NGU - 1); ++j) if (query[j].t == 1 && edge_[ query[j].id ].d >= _query.r) {
gr[ dsu.findSet(edge[ query[j].id ].u) ].clear();
gr[ dsu.findSet(edge[ query[j].id ].v) ].clear();
}
for (int j = i; j <= _.se; ++j) if (query[j].t == 1) edge_[ query[j].id ].d = edge[ query[j].id ].d;
}
for (int j = i; j <= min(q, i + NGU - 1); ++j) if (query[j].t == 1) edge_[ query[j].id ].d = edge[ query[j].id ].d = query[j].r, lst[ query[j].id ] = j;
}
for (int i = 1; i <= q; ++i) if (query[i].t == 2) printf("%d\n", ans[i]);
return 0;
}
Compilation message
bridges.cpp: In function 'int main()':
bridges.cpp:51:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d", &n, &m);
~~~~~^~~~~~~~~~~~~~~~~
bridges.cpp:54:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
int u, v, d; scanf("%d %d %d", &u, &v, &d);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
bridges.cpp:58:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &q);
~~~~~^~~~~~~~~~
bridges.cpp:60:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
int t, id, r; scanf("%d %d %d", &t, &id, &r);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
7 ms |
6648 KB |
Output is correct |
2 |
Correct |
7 ms |
6648 KB |
Output is correct |
3 |
Correct |
47 ms |
7128 KB |
Output is correct |
4 |
Correct |
21 ms |
6776 KB |
Output is correct |
5 |
Correct |
52 ms |
7160 KB |
Output is correct |
6 |
Correct |
44 ms |
7048 KB |
Output is correct |
7 |
Correct |
43 ms |
7000 KB |
Output is correct |
8 |
Correct |
44 ms |
7160 KB |
Output is correct |
9 |
Correct |
52 ms |
7000 KB |
Output is correct |
10 |
Correct |
43 ms |
7056 KB |
Output is correct |
11 |
Correct |
43 ms |
7144 KB |
Output is correct |
12 |
Correct |
46 ms |
7132 KB |
Output is correct |
13 |
Correct |
48 ms |
7032 KB |
Output is correct |
14 |
Correct |
46 ms |
7032 KB |
Output is correct |
15 |
Correct |
49 ms |
7056 KB |
Output is correct |
16 |
Correct |
46 ms |
7032 KB |
Output is correct |
17 |
Correct |
45 ms |
7000 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1517 ms |
13600 KB |
Output is correct |
2 |
Correct |
1471 ms |
13564 KB |
Output is correct |
3 |
Correct |
1477 ms |
13656 KB |
Output is correct |
4 |
Correct |
1457 ms |
13704 KB |
Output is correct |
5 |
Correct |
1428 ms |
13668 KB |
Output is correct |
6 |
Correct |
1827 ms |
12840 KB |
Output is correct |
7 |
Correct |
1760 ms |
12484 KB |
Output is correct |
8 |
Correct |
1738 ms |
12564 KB |
Output is correct |
9 |
Correct |
143 ms |
8568 KB |
Output is correct |
10 |
Correct |
1271 ms |
12592 KB |
Output is correct |
11 |
Correct |
1225 ms |
12508 KB |
Output is correct |
12 |
Correct |
986 ms |
11936 KB |
Output is correct |
13 |
Correct |
1256 ms |
14564 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1214 ms |
12432 KB |
Output is correct |
2 |
Correct |
795 ms |
10300 KB |
Output is correct |
3 |
Correct |
1299 ms |
12248 KB |
Output is correct |
4 |
Correct |
1155 ms |
12576 KB |
Output is correct |
5 |
Correct |
143 ms |
8568 KB |
Output is correct |
6 |
Correct |
1202 ms |
12284 KB |
Output is correct |
7 |
Correct |
1058 ms |
12376 KB |
Output is correct |
8 |
Correct |
965 ms |
12516 KB |
Output is correct |
9 |
Correct |
703 ms |
11244 KB |
Output is correct |
10 |
Correct |
659 ms |
11164 KB |
Output is correct |
11 |
Correct |
876 ms |
13068 KB |
Output is correct |
12 |
Correct |
790 ms |
13040 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1234 ms |
13720 KB |
Output is correct |
2 |
Correct |
144 ms |
8748 KB |
Output is correct |
3 |
Correct |
103 ms |
10608 KB |
Output is correct |
4 |
Correct |
89 ms |
10728 KB |
Output is correct |
5 |
Correct |
1102 ms |
12324 KB |
Output is correct |
6 |
Correct |
1210 ms |
13960 KB |
Output is correct |
7 |
Correct |
1127 ms |
12380 KB |
Output is correct |
8 |
Correct |
893 ms |
11452 KB |
Output is correct |
9 |
Correct |
908 ms |
11628 KB |
Output is correct |
10 |
Correct |
896 ms |
11484 KB |
Output is correct |
11 |
Correct |
1236 ms |
12612 KB |
Output is correct |
12 |
Correct |
1216 ms |
12600 KB |
Output is correct |
13 |
Correct |
1249 ms |
12576 KB |
Output is correct |
14 |
Correct |
1102 ms |
12288 KB |
Output is correct |
15 |
Correct |
1135 ms |
12252 KB |
Output is correct |
16 |
Correct |
1442 ms |
13764 KB |
Output is correct |
17 |
Correct |
1463 ms |
13644 KB |
Output is correct |
18 |
Correct |
1438 ms |
13760 KB |
Output is correct |
19 |
Correct |
1527 ms |
13900 KB |
Output is correct |
20 |
Correct |
1367 ms |
13100 KB |
Output is correct |
21 |
Correct |
1346 ms |
12896 KB |
Output is correct |
22 |
Correct |
1420 ms |
13680 KB |
Output is correct |
23 |
Correct |
1162 ms |
11680 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1517 ms |
13600 KB |
Output is correct |
2 |
Correct |
1471 ms |
13564 KB |
Output is correct |
3 |
Correct |
1477 ms |
13656 KB |
Output is correct |
4 |
Correct |
1457 ms |
13704 KB |
Output is correct |
5 |
Correct |
1428 ms |
13668 KB |
Output is correct |
6 |
Correct |
1827 ms |
12840 KB |
Output is correct |
7 |
Correct |
1760 ms |
12484 KB |
Output is correct |
8 |
Correct |
1738 ms |
12564 KB |
Output is correct |
9 |
Correct |
143 ms |
8568 KB |
Output is correct |
10 |
Correct |
1271 ms |
12592 KB |
Output is correct |
11 |
Correct |
1225 ms |
12508 KB |
Output is correct |
12 |
Correct |
986 ms |
11936 KB |
Output is correct |
13 |
Correct |
1256 ms |
14564 KB |
Output is correct |
14 |
Correct |
1214 ms |
12432 KB |
Output is correct |
15 |
Correct |
795 ms |
10300 KB |
Output is correct |
16 |
Correct |
1299 ms |
12248 KB |
Output is correct |
17 |
Correct |
1155 ms |
12576 KB |
Output is correct |
18 |
Correct |
143 ms |
8568 KB |
Output is correct |
19 |
Correct |
1202 ms |
12284 KB |
Output is correct |
20 |
Correct |
1058 ms |
12376 KB |
Output is correct |
21 |
Correct |
965 ms |
12516 KB |
Output is correct |
22 |
Correct |
703 ms |
11244 KB |
Output is correct |
23 |
Correct |
659 ms |
11164 KB |
Output is correct |
24 |
Correct |
876 ms |
13068 KB |
Output is correct |
25 |
Correct |
790 ms |
13040 KB |
Output is correct |
26 |
Correct |
1648 ms |
13592 KB |
Output is correct |
27 |
Correct |
1854 ms |
13540 KB |
Output is correct |
28 |
Correct |
1688 ms |
13620 KB |
Output is correct |
29 |
Correct |
1375 ms |
13596 KB |
Output is correct |
30 |
Correct |
1866 ms |
13464 KB |
Output is correct |
31 |
Correct |
1991 ms |
13564 KB |
Output is correct |
32 |
Correct |
1886 ms |
13548 KB |
Output is correct |
33 |
Correct |
1707 ms |
13836 KB |
Output is correct |
34 |
Correct |
1731 ms |
13592 KB |
Output is correct |
35 |
Correct |
1741 ms |
13668 KB |
Output is correct |
36 |
Correct |
1465 ms |
13464 KB |
Output is correct |
37 |
Correct |
1438 ms |
13488 KB |
Output is correct |
38 |
Correct |
1452 ms |
13488 KB |
Output is correct |
39 |
Correct |
1054 ms |
12304 KB |
Output is correct |
40 |
Correct |
1048 ms |
12128 KB |
Output is correct |
41 |
Correct |
1091 ms |
12268 KB |
Output is correct |
42 |
Correct |
1183 ms |
14564 KB |
Output is correct |
43 |
Correct |
1182 ms |
14564 KB |
Output is correct |
44 |
Correct |
1147 ms |
14564 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
7 ms |
6648 KB |
Output is correct |
2 |
Correct |
7 ms |
6648 KB |
Output is correct |
3 |
Correct |
47 ms |
7128 KB |
Output is correct |
4 |
Correct |
21 ms |
6776 KB |
Output is correct |
5 |
Correct |
52 ms |
7160 KB |
Output is correct |
6 |
Correct |
44 ms |
7048 KB |
Output is correct |
7 |
Correct |
43 ms |
7000 KB |
Output is correct |
8 |
Correct |
44 ms |
7160 KB |
Output is correct |
9 |
Correct |
52 ms |
7000 KB |
Output is correct |
10 |
Correct |
43 ms |
7056 KB |
Output is correct |
11 |
Correct |
43 ms |
7144 KB |
Output is correct |
12 |
Correct |
46 ms |
7132 KB |
Output is correct |
13 |
Correct |
48 ms |
7032 KB |
Output is correct |
14 |
Correct |
46 ms |
7032 KB |
Output is correct |
15 |
Correct |
49 ms |
7056 KB |
Output is correct |
16 |
Correct |
46 ms |
7032 KB |
Output is correct |
17 |
Correct |
45 ms |
7000 KB |
Output is correct |
18 |
Correct |
1517 ms |
13600 KB |
Output is correct |
19 |
Correct |
1471 ms |
13564 KB |
Output is correct |
20 |
Correct |
1477 ms |
13656 KB |
Output is correct |
21 |
Correct |
1457 ms |
13704 KB |
Output is correct |
22 |
Correct |
1428 ms |
13668 KB |
Output is correct |
23 |
Correct |
1827 ms |
12840 KB |
Output is correct |
24 |
Correct |
1760 ms |
12484 KB |
Output is correct |
25 |
Correct |
1738 ms |
12564 KB |
Output is correct |
26 |
Correct |
143 ms |
8568 KB |
Output is correct |
27 |
Correct |
1271 ms |
12592 KB |
Output is correct |
28 |
Correct |
1225 ms |
12508 KB |
Output is correct |
29 |
Correct |
986 ms |
11936 KB |
Output is correct |
30 |
Correct |
1256 ms |
14564 KB |
Output is correct |
31 |
Correct |
1214 ms |
12432 KB |
Output is correct |
32 |
Correct |
795 ms |
10300 KB |
Output is correct |
33 |
Correct |
1299 ms |
12248 KB |
Output is correct |
34 |
Correct |
1155 ms |
12576 KB |
Output is correct |
35 |
Correct |
143 ms |
8568 KB |
Output is correct |
36 |
Correct |
1202 ms |
12284 KB |
Output is correct |
37 |
Correct |
1058 ms |
12376 KB |
Output is correct |
38 |
Correct |
965 ms |
12516 KB |
Output is correct |
39 |
Correct |
703 ms |
11244 KB |
Output is correct |
40 |
Correct |
659 ms |
11164 KB |
Output is correct |
41 |
Correct |
876 ms |
13068 KB |
Output is correct |
42 |
Correct |
790 ms |
13040 KB |
Output is correct |
43 |
Correct |
1234 ms |
13720 KB |
Output is correct |
44 |
Correct |
144 ms |
8748 KB |
Output is correct |
45 |
Correct |
103 ms |
10608 KB |
Output is correct |
46 |
Correct |
89 ms |
10728 KB |
Output is correct |
47 |
Correct |
1102 ms |
12324 KB |
Output is correct |
48 |
Correct |
1210 ms |
13960 KB |
Output is correct |
49 |
Correct |
1127 ms |
12380 KB |
Output is correct |
50 |
Correct |
893 ms |
11452 KB |
Output is correct |
51 |
Correct |
908 ms |
11628 KB |
Output is correct |
52 |
Correct |
896 ms |
11484 KB |
Output is correct |
53 |
Correct |
1236 ms |
12612 KB |
Output is correct |
54 |
Correct |
1216 ms |
12600 KB |
Output is correct |
55 |
Correct |
1249 ms |
12576 KB |
Output is correct |
56 |
Correct |
1102 ms |
12288 KB |
Output is correct |
57 |
Correct |
1135 ms |
12252 KB |
Output is correct |
58 |
Correct |
1442 ms |
13764 KB |
Output is correct |
59 |
Correct |
1463 ms |
13644 KB |
Output is correct |
60 |
Correct |
1438 ms |
13760 KB |
Output is correct |
61 |
Correct |
1527 ms |
13900 KB |
Output is correct |
62 |
Correct |
1367 ms |
13100 KB |
Output is correct |
63 |
Correct |
1346 ms |
12896 KB |
Output is correct |
64 |
Correct |
1420 ms |
13680 KB |
Output is correct |
65 |
Correct |
1162 ms |
11680 KB |
Output is correct |
66 |
Correct |
1648 ms |
13592 KB |
Output is correct |
67 |
Correct |
1854 ms |
13540 KB |
Output is correct |
68 |
Correct |
1688 ms |
13620 KB |
Output is correct |
69 |
Correct |
1375 ms |
13596 KB |
Output is correct |
70 |
Correct |
1866 ms |
13464 KB |
Output is correct |
71 |
Correct |
1991 ms |
13564 KB |
Output is correct |
72 |
Correct |
1886 ms |
13548 KB |
Output is correct |
73 |
Correct |
1707 ms |
13836 KB |
Output is correct |
74 |
Correct |
1731 ms |
13592 KB |
Output is correct |
75 |
Correct |
1741 ms |
13668 KB |
Output is correct |
76 |
Correct |
1465 ms |
13464 KB |
Output is correct |
77 |
Correct |
1438 ms |
13488 KB |
Output is correct |
78 |
Correct |
1452 ms |
13488 KB |
Output is correct |
79 |
Correct |
1054 ms |
12304 KB |
Output is correct |
80 |
Correct |
1048 ms |
12128 KB |
Output is correct |
81 |
Correct |
1091 ms |
12268 KB |
Output is correct |
82 |
Correct |
1183 ms |
14564 KB |
Output is correct |
83 |
Correct |
1182 ms |
14564 KB |
Output is correct |
84 |
Correct |
1147 ms |
14564 KB |
Output is correct |
85 |
Correct |
2025 ms |
15556 KB |
Output is correct |
86 |
Correct |
136 ms |
10744 KB |
Output is correct |
87 |
Correct |
138 ms |
10872 KB |
Output is correct |
88 |
Correct |
1785 ms |
14180 KB |
Output is correct |
89 |
Correct |
2041 ms |
15624 KB |
Output is correct |
90 |
Correct |
1818 ms |
14052 KB |
Output is correct |
91 |
Correct |
1737 ms |
13444 KB |
Output is correct |
92 |
Correct |
1701 ms |
13716 KB |
Output is correct |
93 |
Correct |
1982 ms |
12820 KB |
Output is correct |
94 |
Correct |
2107 ms |
14472 KB |
Output is correct |
95 |
Correct |
2094 ms |
14716 KB |
Output is correct |
96 |
Correct |
2173 ms |
13668 KB |
Output is correct |
97 |
Correct |
1282 ms |
12556 KB |
Output is correct |
98 |
Correct |
1562 ms |
14536 KB |
Output is correct |
99 |
Correct |
2175 ms |
15320 KB |
Output is correct |
100 |
Correct |
2271 ms |
15348 KB |
Output is correct |
101 |
Correct |
2305 ms |
15480 KB |
Output is correct |
102 |
Correct |
2339 ms |
15596 KB |
Output is correct |
103 |
Correct |
2292 ms |
15204 KB |
Output is correct |
104 |
Correct |
2289 ms |
15100 KB |
Output is correct |
105 |
Correct |
2025 ms |
14684 KB |
Output is correct |
106 |
Correct |
1786 ms |
14568 KB |
Output is correct |
107 |
Correct |
1622 ms |
13148 KB |
Output is correct |
108 |
Correct |
2299 ms |
15176 KB |
Output is correct |
109 |
Correct |
1960 ms |
12676 KB |
Output is correct |