#include <cmath>
#include <functional>
#include <fstream>
#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <set>
#include <map>
#include <list>
#include <time.h>
#include <math.h>
#include <random>
#include <deque>
#include <queue>
#include <unordered_map>
#include <unordered_set>
#include <iomanip>
#include <bitset>
#include <sstream>
#include <chrono>
#include <cstring>
#include <numeric>
using namespace std;
struct Info
{
int a, sza, ha;
int b, szb, hb;
};
struct Dsu
{
int n;
vector<int> t, sz, h;
vector<Info> histo;
void init(int nn)
{
histo.clear();
t.clear();
h.clear();
sz.clear();
n = nn;
t.resize(n);
iota(t.begin(), t.end(), 0);
sz.resize(n, 1);
h.resize(n, 0);
}
int root(int a)
{
while (a != t[a]) a = t[a];
return a;
}
bool join(int a, int b)
{
a = root(a);
b = root(b);
histo.push_back({ a, sz[a], h[a], b, sz[b], h[b] });
if (a == b) return 0;
if (h[a] < h[b]) swap(a, b);
t[b] = a;
h[a] += (h[a] == h[b]);
sz[a] += sz[b];
return 1;
}
void revert()
{
Info info = histo.back();
histo.pop_back();
int a = info.a, sza = info.sza, ha = info.ha;
int b = info.b, szb = info.szb, hb = info.hb;
t[a] = a;
sz[a] = sza;
h[a] = ha;
t[b] = b;
sz[b] = szb;
h[b] = hb;
}
};
struct Edge
{
int a, b, c;
};
struct Q
{
int x0, x1, x2;
};
signed main()
{
#ifdef ONPC
FILE* stream;
freopen_s(&stream, "input.txt", "r", stdin);
#else
ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#endif
int n, m, q;
cin >> n >> m;
map<int, int> mp;
vector<Edge> edges(m);
for (int i = 0; i < m; i++)
{
int a, b, c;
cin >> a >> b >> c;
a--;
b--;
edges[i] = { a, b, c };
//mp[c] = 0;
}
cin >> q;
vector<Q> queries(q);
for (auto& query : queries)
{
int type;
cin >> type;
if (type == 1)
{
int id, nwc;
cin >> id >> nwc;
id--;
query = { type, id, nwc };
// mp[nwc] = 0;
}
else
{
int vertex, weight;
cin >> vertex >> weight;
vertex--;
query = { 2, vertex, weight };
mp[weight] = 0;
}
}
int y = 1;
vector<int> vals;
vals.push_back(-(int)1e9);
for (auto& it : mp)
{
it.second = y++;
vals.push_back(it.first);
}
auto func = [&](int x)
{
int low = 0, high = (int)vals.size() - 1, cnt = 0;
while (low <= high)
{
int mid = (low + high) / 2;
if (vals[mid] <= x)
{
cnt = mid + 1;
low = mid + 1;
}
else
{
high = mid - 1;
}
}
if (cnt < 1)
{
cout << "fail!\n";
exit(0);
}
cnt--;
return cnt;
};
for (auto& query : queries)
{
if (query.x0 == 2) query.x2 = mp[query.x2]; else query.x2 = func(query.x2);
}
for (int i = 0; i < m; i++)
{
edges[i].c = func(edges[i].c);
}
vector<vector<int>> cine(y);
for (int i = 0; i < m; i++)
{
cine[edges[i].c].push_back(i);
}
for (auto& query : queries)
{
int type = query.x0;
if (type == 1)
{
int id = query.x1, nwc = query.x2;
cine[nwc].push_back(id);
}
}
vector<int> initial(m);
vector<int> what(q);
vector<vector<int>> intrebari(y);
const int Magic = 1000;
int low = 0;
while (low < q)
{
int high = min(q - 1, low + Magic - 1);
vector<bool> atins(m, 0);
for (int iq = low; iq <= high; iq++) if (queries[iq].x0 == 1) atins[queries[iq].x1] = 1;
for (int iq = low; iq <= high; iq++) if (queries[iq].x0 == 2) intrebari[queries[iq].x2].push_back(iq);
vector<int> speciale;
for (int i = 0; i < m; i++) if (atins[i]) speciale.push_back(i);
for (int i = 0; i < m; i++) initial[i] = edges[i].c;
Dsu dsu;
dsu.init(n);
for (int c = y - 1; c >= 0; c--)
{
for (auto& i : cine[c])
{
if (edges[i].c == c && !atins[i])
{
dsu.join(edges[i].a, edges[i].b);
}
}
for (auto& iq : intrebari[c])
{
int init_dim = (int)dsu.histo.size();
for (auto& i : speciale) edges[i].c = initial[i];
for (int iq2 = low; iq2 < iq; iq2++)
{
auto& query = queries[iq2];
int type = query.x0;
if (type == 1)
{
int id = query.x1, nwc = query.x2;
edges[id].c = nwc;
}
}
int vertex = queries[iq].x1, weight = queries[iq].x2;
for (auto& i : speciale)
{
if (edges[i].c >= c)
{
dsu.join(edges[i].a, edges[i].b);
}
}
what[iq] = dsu.sz[dsu.root(vertex)];
while ((int)dsu.histo.size() > init_dim) dsu.revert();
}
}
for (int iq = low; iq <= high; iq++)
{
auto& query = queries[iq];
int type = query.x0;
if (type == 1)
{
int id = query.x1, nwc = query.x2;
edges[id].c = nwc;
}
}
for (int iq = low; iq <= high; iq++) if (queries[iq].x0 == 2) intrebari[queries[iq].x2].clear();
low = high + 1;
}
for (int iq = 0; iq < q; iq++)
{
if (queries[iq].x0 == 2)
{
cout << what[iq] << "\n";
}
}
return 0;
}
Compilation message
bridges.cpp: In function 'int main()':
bridges.cpp:239:34: warning: unused variable 'weight' [-Wunused-variable]
239 | int vertex = queries[iq].x1, weight = queries[iq].x2;
| ^~~~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
50 ms |
1280 KB |
Output is correct |
4 |
Correct |
13 ms |
1748 KB |
Output is correct |
5 |
Correct |
22 ms |
1144 KB |
Output is correct |
6 |
Correct |
18 ms |
724 KB |
Output is correct |
7 |
Correct |
20 ms |
620 KB |
Output is correct |
8 |
Correct |
21 ms |
1000 KB |
Output is correct |
9 |
Correct |
20 ms |
468 KB |
Output is correct |
10 |
Correct |
24 ms |
1160 KB |
Output is correct |
11 |
Correct |
23 ms |
1164 KB |
Output is correct |
12 |
Correct |
23 ms |
1108 KB |
Output is correct |
13 |
Correct |
28 ms |
1096 KB |
Output is correct |
14 |
Correct |
26 ms |
1160 KB |
Output is correct |
15 |
Correct |
24 ms |
1188 KB |
Output is correct |
16 |
Correct |
20 ms |
520 KB |
Output is correct |
17 |
Correct |
20 ms |
468 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1394 ms |
14040 KB |
Output is correct |
2 |
Correct |
1387 ms |
13868 KB |
Output is correct |
3 |
Correct |
1457 ms |
13812 KB |
Output is correct |
4 |
Correct |
1396 ms |
13644 KB |
Output is correct |
5 |
Correct |
1478 ms |
13664 KB |
Output is correct |
6 |
Correct |
1385 ms |
12784 KB |
Output is correct |
7 |
Correct |
1372 ms |
14104 KB |
Output is correct |
8 |
Correct |
1402 ms |
14776 KB |
Output is correct |
9 |
Correct |
230 ms |
14936 KB |
Output is correct |
10 |
Correct |
1278 ms |
8632 KB |
Output is correct |
11 |
Correct |
1243 ms |
8388 KB |
Output is correct |
12 |
Correct |
767 ms |
15788 KB |
Output is correct |
13 |
Correct |
1006 ms |
14588 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1191 ms |
12032 KB |
Output is correct |
2 |
Correct |
942 ms |
6648 KB |
Output is correct |
3 |
Correct |
1255 ms |
9220 KB |
Output is correct |
4 |
Correct |
1127 ms |
11912 KB |
Output is correct |
5 |
Correct |
171 ms |
14896 KB |
Output is correct |
6 |
Correct |
1293 ms |
12852 KB |
Output is correct |
7 |
Correct |
1092 ms |
12616 KB |
Output is correct |
8 |
Correct |
1004 ms |
12660 KB |
Output is correct |
9 |
Correct |
766 ms |
17540 KB |
Output is correct |
10 |
Correct |
775 ms |
17456 KB |
Output is correct |
11 |
Correct |
694 ms |
7580 KB |
Output is correct |
12 |
Correct |
642 ms |
7484 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1362 ms |
24024 KB |
Output is correct |
2 |
Correct |
239 ms |
14996 KB |
Output is correct |
3 |
Correct |
122 ms |
9440 KB |
Output is correct |
4 |
Correct |
89 ms |
7912 KB |
Output is correct |
5 |
Correct |
740 ms |
10384 KB |
Output is correct |
6 |
Correct |
1427 ms |
23884 KB |
Output is correct |
7 |
Correct |
866 ms |
9988 KB |
Output is correct |
8 |
Correct |
765 ms |
19892 KB |
Output is correct |
9 |
Correct |
745 ms |
19960 KB |
Output is correct |
10 |
Correct |
561 ms |
18988 KB |
Output is correct |
11 |
Correct |
1149 ms |
22820 KB |
Output is correct |
12 |
Correct |
1207 ms |
22820 KB |
Output is correct |
13 |
Correct |
837 ms |
22248 KB |
Output is correct |
14 |
Correct |
830 ms |
10592 KB |
Output is correct |
15 |
Correct |
821 ms |
10964 KB |
Output is correct |
16 |
Correct |
1432 ms |
25004 KB |
Output is correct |
17 |
Correct |
1397 ms |
24972 KB |
Output is correct |
18 |
Correct |
1503 ms |
25040 KB |
Output is correct |
19 |
Correct |
1414 ms |
25080 KB |
Output is correct |
20 |
Correct |
815 ms |
22700 KB |
Output is correct |
21 |
Correct |
807 ms |
22464 KB |
Output is correct |
22 |
Correct |
1098 ms |
24320 KB |
Output is correct |
23 |
Correct |
637 ms |
10184 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1394 ms |
14040 KB |
Output is correct |
2 |
Correct |
1387 ms |
13868 KB |
Output is correct |
3 |
Correct |
1457 ms |
13812 KB |
Output is correct |
4 |
Correct |
1396 ms |
13644 KB |
Output is correct |
5 |
Correct |
1478 ms |
13664 KB |
Output is correct |
6 |
Correct |
1385 ms |
12784 KB |
Output is correct |
7 |
Correct |
1372 ms |
14104 KB |
Output is correct |
8 |
Correct |
1402 ms |
14776 KB |
Output is correct |
9 |
Correct |
230 ms |
14936 KB |
Output is correct |
10 |
Correct |
1278 ms |
8632 KB |
Output is correct |
11 |
Correct |
1243 ms |
8388 KB |
Output is correct |
12 |
Correct |
767 ms |
15788 KB |
Output is correct |
13 |
Correct |
1006 ms |
14588 KB |
Output is correct |
14 |
Correct |
1191 ms |
12032 KB |
Output is correct |
15 |
Correct |
942 ms |
6648 KB |
Output is correct |
16 |
Correct |
1255 ms |
9220 KB |
Output is correct |
17 |
Correct |
1127 ms |
11912 KB |
Output is correct |
18 |
Correct |
171 ms |
14896 KB |
Output is correct |
19 |
Correct |
1293 ms |
12852 KB |
Output is correct |
20 |
Correct |
1092 ms |
12616 KB |
Output is correct |
21 |
Correct |
1004 ms |
12660 KB |
Output is correct |
22 |
Correct |
766 ms |
17540 KB |
Output is correct |
23 |
Correct |
775 ms |
17456 KB |
Output is correct |
24 |
Correct |
694 ms |
7580 KB |
Output is correct |
25 |
Correct |
642 ms |
7484 KB |
Output is correct |
26 |
Correct |
1432 ms |
14664 KB |
Output is correct |
27 |
Correct |
1726 ms |
11196 KB |
Output is correct |
28 |
Correct |
1530 ms |
14620 KB |
Output is correct |
29 |
Correct |
1087 ms |
14412 KB |
Output is correct |
30 |
Correct |
1692 ms |
12860 KB |
Output is correct |
31 |
Correct |
1739 ms |
12692 KB |
Output is correct |
32 |
Correct |
1710 ms |
12652 KB |
Output is correct |
33 |
Correct |
1509 ms |
14668 KB |
Output is correct |
34 |
Correct |
1698 ms |
14772 KB |
Output is correct |
35 |
Correct |
1574 ms |
14724 KB |
Output is correct |
36 |
Correct |
1169 ms |
14552 KB |
Output is correct |
37 |
Correct |
1167 ms |
14436 KB |
Output is correct |
38 |
Correct |
1174 ms |
14440 KB |
Output is correct |
39 |
Correct |
951 ms |
19580 KB |
Output is correct |
40 |
Correct |
972 ms |
19552 KB |
Output is correct |
41 |
Correct |
993 ms |
19484 KB |
Output is correct |
42 |
Correct |
691 ms |
9276 KB |
Output is correct |
43 |
Correct |
704 ms |
9308 KB |
Output is correct |
44 |
Correct |
688 ms |
9212 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
50 ms |
1280 KB |
Output is correct |
4 |
Correct |
13 ms |
1748 KB |
Output is correct |
5 |
Correct |
22 ms |
1144 KB |
Output is correct |
6 |
Correct |
18 ms |
724 KB |
Output is correct |
7 |
Correct |
20 ms |
620 KB |
Output is correct |
8 |
Correct |
21 ms |
1000 KB |
Output is correct |
9 |
Correct |
20 ms |
468 KB |
Output is correct |
10 |
Correct |
24 ms |
1160 KB |
Output is correct |
11 |
Correct |
23 ms |
1164 KB |
Output is correct |
12 |
Correct |
23 ms |
1108 KB |
Output is correct |
13 |
Correct |
28 ms |
1096 KB |
Output is correct |
14 |
Correct |
26 ms |
1160 KB |
Output is correct |
15 |
Correct |
24 ms |
1188 KB |
Output is correct |
16 |
Correct |
20 ms |
520 KB |
Output is correct |
17 |
Correct |
20 ms |
468 KB |
Output is correct |
18 |
Correct |
1394 ms |
14040 KB |
Output is correct |
19 |
Correct |
1387 ms |
13868 KB |
Output is correct |
20 |
Correct |
1457 ms |
13812 KB |
Output is correct |
21 |
Correct |
1396 ms |
13644 KB |
Output is correct |
22 |
Correct |
1478 ms |
13664 KB |
Output is correct |
23 |
Correct |
1385 ms |
12784 KB |
Output is correct |
24 |
Correct |
1372 ms |
14104 KB |
Output is correct |
25 |
Correct |
1402 ms |
14776 KB |
Output is correct |
26 |
Correct |
230 ms |
14936 KB |
Output is correct |
27 |
Correct |
1278 ms |
8632 KB |
Output is correct |
28 |
Correct |
1243 ms |
8388 KB |
Output is correct |
29 |
Correct |
767 ms |
15788 KB |
Output is correct |
30 |
Correct |
1006 ms |
14588 KB |
Output is correct |
31 |
Correct |
1191 ms |
12032 KB |
Output is correct |
32 |
Correct |
942 ms |
6648 KB |
Output is correct |
33 |
Correct |
1255 ms |
9220 KB |
Output is correct |
34 |
Correct |
1127 ms |
11912 KB |
Output is correct |
35 |
Correct |
171 ms |
14896 KB |
Output is correct |
36 |
Correct |
1293 ms |
12852 KB |
Output is correct |
37 |
Correct |
1092 ms |
12616 KB |
Output is correct |
38 |
Correct |
1004 ms |
12660 KB |
Output is correct |
39 |
Correct |
766 ms |
17540 KB |
Output is correct |
40 |
Correct |
775 ms |
17456 KB |
Output is correct |
41 |
Correct |
694 ms |
7580 KB |
Output is correct |
42 |
Correct |
642 ms |
7484 KB |
Output is correct |
43 |
Correct |
1362 ms |
24024 KB |
Output is correct |
44 |
Correct |
239 ms |
14996 KB |
Output is correct |
45 |
Correct |
122 ms |
9440 KB |
Output is correct |
46 |
Correct |
89 ms |
7912 KB |
Output is correct |
47 |
Correct |
740 ms |
10384 KB |
Output is correct |
48 |
Correct |
1427 ms |
23884 KB |
Output is correct |
49 |
Correct |
866 ms |
9988 KB |
Output is correct |
50 |
Correct |
765 ms |
19892 KB |
Output is correct |
51 |
Correct |
745 ms |
19960 KB |
Output is correct |
52 |
Correct |
561 ms |
18988 KB |
Output is correct |
53 |
Correct |
1149 ms |
22820 KB |
Output is correct |
54 |
Correct |
1207 ms |
22820 KB |
Output is correct |
55 |
Correct |
837 ms |
22248 KB |
Output is correct |
56 |
Correct |
830 ms |
10592 KB |
Output is correct |
57 |
Correct |
821 ms |
10964 KB |
Output is correct |
58 |
Correct |
1432 ms |
25004 KB |
Output is correct |
59 |
Correct |
1397 ms |
24972 KB |
Output is correct |
60 |
Correct |
1503 ms |
25040 KB |
Output is correct |
61 |
Correct |
1414 ms |
25080 KB |
Output is correct |
62 |
Correct |
815 ms |
22700 KB |
Output is correct |
63 |
Correct |
807 ms |
22464 KB |
Output is correct |
64 |
Correct |
1098 ms |
24320 KB |
Output is correct |
65 |
Correct |
637 ms |
10184 KB |
Output is correct |
66 |
Correct |
1432 ms |
14664 KB |
Output is correct |
67 |
Correct |
1726 ms |
11196 KB |
Output is correct |
68 |
Correct |
1530 ms |
14620 KB |
Output is correct |
69 |
Correct |
1087 ms |
14412 KB |
Output is correct |
70 |
Correct |
1692 ms |
12860 KB |
Output is correct |
71 |
Correct |
1739 ms |
12692 KB |
Output is correct |
72 |
Correct |
1710 ms |
12652 KB |
Output is correct |
73 |
Correct |
1509 ms |
14668 KB |
Output is correct |
74 |
Correct |
1698 ms |
14772 KB |
Output is correct |
75 |
Correct |
1574 ms |
14724 KB |
Output is correct |
76 |
Correct |
1169 ms |
14552 KB |
Output is correct |
77 |
Correct |
1167 ms |
14436 KB |
Output is correct |
78 |
Correct |
1174 ms |
14440 KB |
Output is correct |
79 |
Correct |
951 ms |
19580 KB |
Output is correct |
80 |
Correct |
972 ms |
19552 KB |
Output is correct |
81 |
Correct |
993 ms |
19484 KB |
Output is correct |
82 |
Correct |
691 ms |
9276 KB |
Output is correct |
83 |
Correct |
704 ms |
9308 KB |
Output is correct |
84 |
Correct |
688 ms |
9212 KB |
Output is correct |
85 |
Correct |
1926 ms |
18624 KB |
Output is correct |
86 |
Correct |
162 ms |
10032 KB |
Output is correct |
87 |
Correct |
144 ms |
9036 KB |
Output is correct |
88 |
Correct |
1406 ms |
11752 KB |
Output is correct |
89 |
Correct |
1979 ms |
18460 KB |
Output is correct |
90 |
Correct |
1506 ms |
11076 KB |
Output is correct |
91 |
Correct |
1659 ms |
14468 KB |
Output is correct |
92 |
Correct |
1714 ms |
14340 KB |
Output is correct |
93 |
Correct |
2177 ms |
16488 KB |
Output is correct |
94 |
Correct |
2013 ms |
16980 KB |
Output is correct |
95 |
Correct |
2003 ms |
17100 KB |
Output is correct |
96 |
Correct |
2066 ms |
17312 KB |
Output is correct |
97 |
Correct |
991 ms |
10652 KB |
Output is correct |
98 |
Correct |
1189 ms |
11428 KB |
Output is correct |
99 |
Correct |
2162 ms |
17900 KB |
Output is correct |
100 |
Correct |
2306 ms |
21416 KB |
Output is correct |
101 |
Correct |
2354 ms |
21600 KB |
Output is correct |
102 |
Correct |
2374 ms |
21592 KB |
Output is correct |
103 |
Correct |
2282 ms |
20500 KB |
Output is correct |
104 |
Correct |
2236 ms |
20104 KB |
Output is correct |
105 |
Correct |
1849 ms |
19428 KB |
Output is correct |
106 |
Correct |
1561 ms |
18504 KB |
Output is correct |
107 |
Correct |
1248 ms |
24276 KB |
Output is correct |
108 |
Correct |
2165 ms |
21520 KB |
Output is correct |
109 |
Correct |
1810 ms |
12496 KB |
Output is correct |