///
#include<bits/stdc++.h>
#define task "C"
#define ll long long
#define ld long double
#define fi first
#define se second
#define pb push_back
using namespace std;
const int MAXN = 1e5 + 5;
const ll INF = 1e18 + 5;
const int BS = 600;
int n, m;
pair<int, int> edge[MAXN];
int w[MAXN];
void Input()
{
cin >> n >> m;
for (int i = 1; i <= m; i++)
{
int u, v;
cin >> u >> v >> w[i];
edge[i] = {u, v};
}
}
pair<int, int> qu[MAXN];
vector<int> thaydoi[MAXN];
bool isc[MAXN];
int ans[MAXN];
int lab[MAXN];
struct TRb
{
int u, v, labu, labv;
};
vector<TRb> rb;
void rollback(int sz)
{
while (rb.size() > sz)
{
auto last = rb.back();
rb.pop_back();
lab[last.u] = last.labu;
lab[last.v] = last.labv;
}
}
int FindSet(int u)
{
return lab[u] < 0 ? u : FindSet(lab[u]);
}
void Unite(int u, int v)
{
u = FindSet(u);
v = FindSet(v);
if (u == v)
return;
if (lab[u] > lab[v])
swap(u, v);
rb.pb({u, v, lab[u], lab[v]});
lab[u] += lab[v];
lab[v] = u;
}
void Solve()
{
int q;
cin >> q;
vector<int> cse(m);
iota(cse.begin(), cse.end(), 1);
for (int bl = 1; bl <= (q + BS - 1) / BS; bl++)
{
fill(lab, lab + 1 + n, -1);
sort(cse.begin(), cse.end(), [](int i, int j)
{
return w[i] > w[j];
});
vector<int> t1, t2;
int lf = (bl - 1) * BS + 1, rf = min(q, bl * BS);
for (int i = lf; i <= rf; i++)
{
int t;
cin >> t >> qu[i].fi >> qu[i].se;
if (t == 1)
{
if (thaydoi[qu[i].fi].empty())
{
t1.pb(qu[i].fi);
}
thaydoi[qu[i].fi].pb(i);
}
else
{
t2.pb(i);
}
}
sort(t2.begin(), t2.end(), [](int i, int j)
{
return qu[i].se > qu[j].se;
});
int i = 0;
for (int id : t2)
{
while (i < m && w[cse[i]] >= qu[id].se)
{
if (!thaydoi[cse[i]].empty())
{
i++;
continue;
}
Unite(edge[cse[i]].fi, edge[cse[i]].se);
i++;
}
int sz = rb.size();
for (int j : t1)
{
int p = lower_bound(thaydoi[j].begin(), thaydoi[j].end(), id) - thaydoi[j].begin() - 1;
int w1 = p < 0 ? w[j] : qu[thaydoi[j][p]].se;
if (w1 >= qu[id].se)
Unite(edge[j].fi, edge[j].se);
}
ans[id] = -lab[FindSet(qu[id].fi)];
//assert(1 < 0);
rollback(sz);
}
for (int id : t1)
{
w[id] = qu[thaydoi[id].back()].se;
thaydoi[id].clear();
}
}
for (int i = 1; i <= q; i++)
{
if (ans[i])
cout << ans[i] << '\n';
}
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
if (fopen(task".INP","r"))
{
freopen(task".INP","r",stdin);
//freopen(task".OUT","w",stdout);
}
Input();
Solve();
}
Compilation message
bridges.cpp: In function 'void rollback(int)':
bridges.cpp:44:22: warning: comparison of integer expressions of different signedness: 'std::vector<TRb>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
44 | while (rb.size() > sz)
| ~~~~~~~~~~^~~~
bridges.cpp: In function 'int main()':
bridges.cpp:153:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
153 | freopen(task".INP","r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2644 KB |
Output is correct |
2 |
Correct |
1 ms |
2644 KB |
Output is correct |
3 |
Correct |
24 ms |
2824 KB |
Output is correct |
4 |
Correct |
4 ms |
2772 KB |
Output is correct |
5 |
Correct |
13 ms |
2772 KB |
Output is correct |
6 |
Correct |
11 ms |
2832 KB |
Output is correct |
7 |
Correct |
12 ms |
2772 KB |
Output is correct |
8 |
Correct |
14 ms |
2772 KB |
Output is correct |
9 |
Correct |
12 ms |
2772 KB |
Output is correct |
10 |
Correct |
18 ms |
2772 KB |
Output is correct |
11 |
Correct |
16 ms |
2772 KB |
Output is correct |
12 |
Correct |
17 ms |
2732 KB |
Output is correct |
13 |
Correct |
18 ms |
2788 KB |
Output is correct |
14 |
Correct |
18 ms |
2824 KB |
Output is correct |
15 |
Correct |
16 ms |
2836 KB |
Output is correct |
16 |
Correct |
13 ms |
2740 KB |
Output is correct |
17 |
Correct |
13 ms |
2772 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1181 ms |
136256 KB |
Output is correct |
2 |
Correct |
1191 ms |
136264 KB |
Output is correct |
3 |
Correct |
1201 ms |
136216 KB |
Output is correct |
4 |
Correct |
1228 ms |
136124 KB |
Output is correct |
5 |
Correct |
1282 ms |
136148 KB |
Output is correct |
6 |
Correct |
1494 ms |
136204 KB |
Output is correct |
7 |
Correct |
1511 ms |
136224 KB |
Output is correct |
8 |
Correct |
1506 ms |
136240 KB |
Output is correct |
9 |
Correct |
30 ms |
4044 KB |
Output is correct |
10 |
Correct |
980 ms |
136348 KB |
Output is correct |
11 |
Correct |
893 ms |
136224 KB |
Output is correct |
12 |
Correct |
1101 ms |
136108 KB |
Output is correct |
13 |
Correct |
1140 ms |
136540 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
870 ms |
136356 KB |
Output is correct |
2 |
Correct |
488 ms |
36768 KB |
Output is correct |
3 |
Correct |
1004 ms |
136312 KB |
Output is correct |
4 |
Correct |
848 ms |
136304 KB |
Output is correct |
5 |
Correct |
35 ms |
4040 KB |
Output is correct |
6 |
Correct |
958 ms |
136312 KB |
Output is correct |
7 |
Correct |
860 ms |
136256 KB |
Output is correct |
8 |
Correct |
806 ms |
136432 KB |
Output is correct |
9 |
Correct |
691 ms |
135780 KB |
Output is correct |
10 |
Correct |
691 ms |
135808 KB |
Output is correct |
11 |
Correct |
756 ms |
136500 KB |
Output is correct |
12 |
Correct |
770 ms |
136516 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1648 ms |
136500 KB |
Output is correct |
2 |
Correct |
52 ms |
3988 KB |
Output is correct |
3 |
Correct |
147 ms |
4628 KB |
Output is correct |
4 |
Correct |
126 ms |
4576 KB |
Output is correct |
5 |
Correct |
1514 ms |
136508 KB |
Output is correct |
6 |
Correct |
1656 ms |
136504 KB |
Output is correct |
7 |
Correct |
1368 ms |
136428 KB |
Output is correct |
8 |
Correct |
813 ms |
135752 KB |
Output is correct |
9 |
Correct |
708 ms |
135736 KB |
Output is correct |
10 |
Correct |
709 ms |
136080 KB |
Output is correct |
11 |
Correct |
1114 ms |
136240 KB |
Output is correct |
12 |
Correct |
1038 ms |
136308 KB |
Output is correct |
13 |
Correct |
1103 ms |
136536 KB |
Output is correct |
14 |
Correct |
1145 ms |
136504 KB |
Output is correct |
15 |
Correct |
1260 ms |
136488 KB |
Output is correct |
16 |
Correct |
1537 ms |
136480 KB |
Output is correct |
17 |
Correct |
1505 ms |
136372 KB |
Output is correct |
18 |
Correct |
1620 ms |
136792 KB |
Output is correct |
19 |
Correct |
1421 ms |
136716 KB |
Output is correct |
20 |
Correct |
1298 ms |
136744 KB |
Output is correct |
21 |
Correct |
1231 ms |
136716 KB |
Output is correct |
22 |
Correct |
1286 ms |
136396 KB |
Output is correct |
23 |
Correct |
940 ms |
136288 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1181 ms |
136256 KB |
Output is correct |
2 |
Correct |
1191 ms |
136264 KB |
Output is correct |
3 |
Correct |
1201 ms |
136216 KB |
Output is correct |
4 |
Correct |
1228 ms |
136124 KB |
Output is correct |
5 |
Correct |
1282 ms |
136148 KB |
Output is correct |
6 |
Correct |
1494 ms |
136204 KB |
Output is correct |
7 |
Correct |
1511 ms |
136224 KB |
Output is correct |
8 |
Correct |
1506 ms |
136240 KB |
Output is correct |
9 |
Correct |
30 ms |
4044 KB |
Output is correct |
10 |
Correct |
980 ms |
136348 KB |
Output is correct |
11 |
Correct |
893 ms |
136224 KB |
Output is correct |
12 |
Correct |
1101 ms |
136108 KB |
Output is correct |
13 |
Correct |
1140 ms |
136540 KB |
Output is correct |
14 |
Correct |
870 ms |
136356 KB |
Output is correct |
15 |
Correct |
488 ms |
36768 KB |
Output is correct |
16 |
Correct |
1004 ms |
136312 KB |
Output is correct |
17 |
Correct |
848 ms |
136304 KB |
Output is correct |
18 |
Correct |
35 ms |
4040 KB |
Output is correct |
19 |
Correct |
958 ms |
136312 KB |
Output is correct |
20 |
Correct |
860 ms |
136256 KB |
Output is correct |
21 |
Correct |
806 ms |
136432 KB |
Output is correct |
22 |
Correct |
691 ms |
135780 KB |
Output is correct |
23 |
Correct |
691 ms |
135808 KB |
Output is correct |
24 |
Correct |
756 ms |
136500 KB |
Output is correct |
25 |
Correct |
770 ms |
136516 KB |
Output is correct |
26 |
Correct |
1229 ms |
136248 KB |
Output is correct |
27 |
Correct |
1374 ms |
136236 KB |
Output is correct |
28 |
Correct |
1326 ms |
136120 KB |
Output is correct |
29 |
Correct |
1068 ms |
136148 KB |
Output is correct |
30 |
Correct |
1348 ms |
136216 KB |
Output is correct |
31 |
Correct |
1372 ms |
136344 KB |
Output is correct |
32 |
Correct |
1390 ms |
136276 KB |
Output is correct |
33 |
Correct |
1256 ms |
136252 KB |
Output is correct |
34 |
Correct |
1272 ms |
136132 KB |
Output is correct |
35 |
Correct |
1330 ms |
136288 KB |
Output is correct |
36 |
Correct |
1115 ms |
136272 KB |
Output is correct |
37 |
Correct |
1094 ms |
136312 KB |
Output is correct |
38 |
Correct |
1068 ms |
136168 KB |
Output is correct |
39 |
Correct |
1018 ms |
135768 KB |
Output is correct |
40 |
Correct |
982 ms |
135704 KB |
Output is correct |
41 |
Correct |
1040 ms |
135800 KB |
Output is correct |
42 |
Correct |
902 ms |
136540 KB |
Output is correct |
43 |
Correct |
943 ms |
136548 KB |
Output is correct |
44 |
Correct |
958 ms |
136584 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2644 KB |
Output is correct |
2 |
Correct |
1 ms |
2644 KB |
Output is correct |
3 |
Correct |
24 ms |
2824 KB |
Output is correct |
4 |
Correct |
4 ms |
2772 KB |
Output is correct |
5 |
Correct |
13 ms |
2772 KB |
Output is correct |
6 |
Correct |
11 ms |
2832 KB |
Output is correct |
7 |
Correct |
12 ms |
2772 KB |
Output is correct |
8 |
Correct |
14 ms |
2772 KB |
Output is correct |
9 |
Correct |
12 ms |
2772 KB |
Output is correct |
10 |
Correct |
18 ms |
2772 KB |
Output is correct |
11 |
Correct |
16 ms |
2772 KB |
Output is correct |
12 |
Correct |
17 ms |
2732 KB |
Output is correct |
13 |
Correct |
18 ms |
2788 KB |
Output is correct |
14 |
Correct |
18 ms |
2824 KB |
Output is correct |
15 |
Correct |
16 ms |
2836 KB |
Output is correct |
16 |
Correct |
13 ms |
2740 KB |
Output is correct |
17 |
Correct |
13 ms |
2772 KB |
Output is correct |
18 |
Correct |
1181 ms |
136256 KB |
Output is correct |
19 |
Correct |
1191 ms |
136264 KB |
Output is correct |
20 |
Correct |
1201 ms |
136216 KB |
Output is correct |
21 |
Correct |
1228 ms |
136124 KB |
Output is correct |
22 |
Correct |
1282 ms |
136148 KB |
Output is correct |
23 |
Correct |
1494 ms |
136204 KB |
Output is correct |
24 |
Correct |
1511 ms |
136224 KB |
Output is correct |
25 |
Correct |
1506 ms |
136240 KB |
Output is correct |
26 |
Correct |
30 ms |
4044 KB |
Output is correct |
27 |
Correct |
980 ms |
136348 KB |
Output is correct |
28 |
Correct |
893 ms |
136224 KB |
Output is correct |
29 |
Correct |
1101 ms |
136108 KB |
Output is correct |
30 |
Correct |
1140 ms |
136540 KB |
Output is correct |
31 |
Correct |
870 ms |
136356 KB |
Output is correct |
32 |
Correct |
488 ms |
36768 KB |
Output is correct |
33 |
Correct |
1004 ms |
136312 KB |
Output is correct |
34 |
Correct |
848 ms |
136304 KB |
Output is correct |
35 |
Correct |
35 ms |
4040 KB |
Output is correct |
36 |
Correct |
958 ms |
136312 KB |
Output is correct |
37 |
Correct |
860 ms |
136256 KB |
Output is correct |
38 |
Correct |
806 ms |
136432 KB |
Output is correct |
39 |
Correct |
691 ms |
135780 KB |
Output is correct |
40 |
Correct |
691 ms |
135808 KB |
Output is correct |
41 |
Correct |
756 ms |
136500 KB |
Output is correct |
42 |
Correct |
770 ms |
136516 KB |
Output is correct |
43 |
Correct |
1648 ms |
136500 KB |
Output is correct |
44 |
Correct |
52 ms |
3988 KB |
Output is correct |
45 |
Correct |
147 ms |
4628 KB |
Output is correct |
46 |
Correct |
126 ms |
4576 KB |
Output is correct |
47 |
Correct |
1514 ms |
136508 KB |
Output is correct |
48 |
Correct |
1656 ms |
136504 KB |
Output is correct |
49 |
Correct |
1368 ms |
136428 KB |
Output is correct |
50 |
Correct |
813 ms |
135752 KB |
Output is correct |
51 |
Correct |
708 ms |
135736 KB |
Output is correct |
52 |
Correct |
709 ms |
136080 KB |
Output is correct |
53 |
Correct |
1114 ms |
136240 KB |
Output is correct |
54 |
Correct |
1038 ms |
136308 KB |
Output is correct |
55 |
Correct |
1103 ms |
136536 KB |
Output is correct |
56 |
Correct |
1145 ms |
136504 KB |
Output is correct |
57 |
Correct |
1260 ms |
136488 KB |
Output is correct |
58 |
Correct |
1537 ms |
136480 KB |
Output is correct |
59 |
Correct |
1505 ms |
136372 KB |
Output is correct |
60 |
Correct |
1620 ms |
136792 KB |
Output is correct |
61 |
Correct |
1421 ms |
136716 KB |
Output is correct |
62 |
Correct |
1298 ms |
136744 KB |
Output is correct |
63 |
Correct |
1231 ms |
136716 KB |
Output is correct |
64 |
Correct |
1286 ms |
136396 KB |
Output is correct |
65 |
Correct |
940 ms |
136288 KB |
Output is correct |
66 |
Correct |
1229 ms |
136248 KB |
Output is correct |
67 |
Correct |
1374 ms |
136236 KB |
Output is correct |
68 |
Correct |
1326 ms |
136120 KB |
Output is correct |
69 |
Correct |
1068 ms |
136148 KB |
Output is correct |
70 |
Correct |
1348 ms |
136216 KB |
Output is correct |
71 |
Correct |
1372 ms |
136344 KB |
Output is correct |
72 |
Correct |
1390 ms |
136276 KB |
Output is correct |
73 |
Correct |
1256 ms |
136252 KB |
Output is correct |
74 |
Correct |
1272 ms |
136132 KB |
Output is correct |
75 |
Correct |
1330 ms |
136288 KB |
Output is correct |
76 |
Correct |
1115 ms |
136272 KB |
Output is correct |
77 |
Correct |
1094 ms |
136312 KB |
Output is correct |
78 |
Correct |
1068 ms |
136168 KB |
Output is correct |
79 |
Correct |
1018 ms |
135768 KB |
Output is correct |
80 |
Correct |
982 ms |
135704 KB |
Output is correct |
81 |
Correct |
1040 ms |
135800 KB |
Output is correct |
82 |
Correct |
902 ms |
136540 KB |
Output is correct |
83 |
Correct |
943 ms |
136548 KB |
Output is correct |
84 |
Correct |
958 ms |
136584 KB |
Output is correct |
85 |
Correct |
2226 ms |
137128 KB |
Output is correct |
86 |
Correct |
189 ms |
6448 KB |
Output is correct |
87 |
Correct |
129 ms |
6608 KB |
Output is correct |
88 |
Correct |
1494 ms |
139160 KB |
Output is correct |
89 |
Correct |
2327 ms |
140284 KB |
Output is correct |
90 |
Correct |
1385 ms |
139004 KB |
Output is correct |
91 |
Correct |
1222 ms |
138232 KB |
Output is correct |
92 |
Correct |
1198 ms |
138380 KB |
Output is correct |
93 |
Correct |
1522 ms |
138600 KB |
Output is correct |
94 |
Correct |
1765 ms |
140408 KB |
Output is correct |
95 |
Correct |
1747 ms |
140460 KB |
Output is correct |
96 |
Correct |
1935 ms |
140420 KB |
Output is correct |
97 |
Correct |
1162 ms |
138484 KB |
Output is correct |
98 |
Correct |
1231 ms |
139424 KB |
Output is correct |
99 |
Correct |
2277 ms |
141060 KB |
Output is correct |
100 |
Correct |
2230 ms |
140796 KB |
Output is correct |
101 |
Correct |
2286 ms |
141552 KB |
Output is correct |
102 |
Correct |
2259 ms |
141460 KB |
Output is correct |
103 |
Correct |
2126 ms |
140564 KB |
Output is correct |
104 |
Correct |
2207 ms |
140660 KB |
Output is correct |
105 |
Correct |
1811 ms |
140840 KB |
Output is correct |
106 |
Correct |
1435 ms |
140480 KB |
Output is correct |
107 |
Correct |
1833 ms |
140112 KB |
Output is correct |
108 |
Correct |
2248 ms |
140116 KB |
Output is correct |
109 |
Correct |
1464 ms |
138676 KB |
Output is correct |