#include <iostream>
#include <queue>
#include <stack>
#include <algorithm>
#include <string.h>
#include <functional>
#define task ""
#define size() size() * 1ll
#define all(x) (x).begin(), (x).end()
#define pb push_back
#define pii pair<int, int>
#define fi first
#define se second
#define MASK(x) (1LL << (x))
#define BIT(x,i) (((x) >> (i)) & 1)
#define numbit(x) __builtin_popcountll(x)
using namespace std;
typedef vector<int> vi;
typedef vector<pii> vii;
typedef long long ll;
template<class t>
bool mini(t &x,t y) {
if (y < x) {
x = y;
return 1;
}
return 0;
}
template<class t>
bool maxi(t &x,t y) {
if (x < y) {
x = y;
return 1;
}
return 0;
}
const int N = 1e6 + 1;
const int M = 1e3 + 1;
const long long mod = 1e9 + 7;
const long long oo = 1e18 + 7;
int n, m, q;
int u[N], v[N], w[N], t[N], id[N], z[N], lab[N], ans[N];
vi b[N];
bool changed[N];
stack<array<int, 3>> st;
int root(int u) {
return (lab[u] < 0 ? u : root(lab[u]));
}
bool join(int u, int v) {
if ((u = root(u)) == (v = root(v))) return 0;
if (lab[u] > lab[v]) swap(u, v);
st.push({u, v, lab[v]});
lab[u] += lab[v];
lab[v] = u;
return 1;
}
void roll_back(int sz) {
while (st.size() > sz) {
int u = st.top()[0];
int v = st.top()[1];
int w = st.top()[2];
st.pop();
lab[u] -= w;
lab[v] = w;
}
}
void solve(int test = -1) {
memset(lab, -1, sizeof lab);
memset(ans, -1, sizeof ans);
cin >> n >> m;
for (int i = 1; i <= m; i++) {
cin >> u[i] >> v[i] >> w[i];
}
cin >> q;
for (int i = 1; i <= q; i++) {
cin >> t[i] >> id[i] >> z[i];
}
int blsz = 1000;
for (int l = 1; l <= q; l += blsz) {
int r = min(q, l + blsz - 1);
vi calc, upd, unchanged;
for (int i = l; i <= r; i++) {
if (t[i] == 1) {
changed[id[i]] = 1;
upd.pb(i);
} else {
calc.pb(i);
}
}
for (int i = 1; i <= m; i++) if (!changed[i]) unchanged.pb(i);
sort(all(unchanged), [&](const int &x, const int &y) {
return w[x] > w[y];
});
sort(all(calc), [&](const int &x, const int &y) {
return z[x] > z[y];
});
for (int i = l; i <= r; i++) {
if (t[i] == 1) {
w[id[i]] = z[i];
changed[id[i]] = 0;
} else {
b[i - l].clear();
for (int x: upd) if (w[id[x]] >= z[i]) b[i - l].pb(x);
}
}
for (int j = 0, i = 0; i < calc.size(); i++) {
while (j < unchanged.size() && w[unchanged[j]] >= z[calc[i]]) {
join(u[unchanged[j]], v[unchanged[j]]);
j++;
}
int sz = st.size();
for (int x: b[calc[i] - l]) {
join(u[id[x]], v[id[x]]);
}
ans[calc[i]] = -lab[root(id[calc[i]])];
roll_back(sz);
}
roll_back(0);
}
for (int i = 1; i <= q; i++) if (ans[i] != -1) cout << ans[i] << '\n';
}
int32_t main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
// freopen(task".inp", "r", stdin);
// freopen(task".out", "w", stdout);
int T = 1;
// cin >> T;
for (int i = 1; i <= T; i++) {
solve(i);
}
return 0;
}
/*
*/
Compilation message
bridges.cpp: In function 'void roll_back(int)':
bridges.cpp:63:22: warning: comparison of integer expressions of different signedness: 'long long unsigned int' and 'int' [-Wsign-compare]
63 | while (st.size() > sz) {
| ~~~~~~~~~~^~~~
bridges.cpp: In function 'void solve(int)':
bridges.cpp:112:34: warning: comparison of integer expressions of different signedness: 'int' and 'long long unsigned int' [-Wsign-compare]
112 | for (int j = 0, i = 0; i < calc.size(); i++) {
| ^
bridges.cpp:113:22: warning: comparison of integer expressions of different signedness: 'int' and 'long long unsigned int' [-Wsign-compare]
113 | while (j < unchanged.size() && w[unchanged[j]] >= z[calc[i]]) {
| ^
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
15 ms |
31572 KB |
Output is correct |
2 |
Correct |
13 ms |
31572 KB |
Output is correct |
3 |
Correct |
51 ms |
34024 KB |
Output is correct |
4 |
Correct |
17 ms |
31700 KB |
Output is correct |
5 |
Correct |
54 ms |
34136 KB |
Output is correct |
6 |
Correct |
40 ms |
33748 KB |
Output is correct |
7 |
Correct |
47 ms |
34656 KB |
Output is correct |
8 |
Correct |
49 ms |
33820 KB |
Output is correct |
9 |
Correct |
59 ms |
35528 KB |
Output is correct |
10 |
Correct |
49 ms |
33996 KB |
Output is correct |
11 |
Correct |
52 ms |
33828 KB |
Output is correct |
12 |
Correct |
59 ms |
34028 KB |
Output is correct |
13 |
Correct |
56 ms |
33920 KB |
Output is correct |
14 |
Correct |
59 ms |
33884 KB |
Output is correct |
15 |
Correct |
58 ms |
33928 KB |
Output is correct |
16 |
Correct |
54 ms |
35184 KB |
Output is correct |
17 |
Correct |
55 ms |
34640 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1181 ms |
36968 KB |
Output is correct |
2 |
Correct |
1205 ms |
37084 KB |
Output is correct |
3 |
Correct |
1201 ms |
36988 KB |
Output is correct |
4 |
Correct |
1324 ms |
36880 KB |
Output is correct |
5 |
Correct |
1247 ms |
37148 KB |
Output is correct |
6 |
Correct |
1786 ms |
38700 KB |
Output is correct |
7 |
Correct |
1762 ms |
38684 KB |
Output is correct |
8 |
Correct |
1769 ms |
38788 KB |
Output is correct |
9 |
Correct |
47 ms |
32964 KB |
Output is correct |
10 |
Correct |
992 ms |
38600 KB |
Output is correct |
11 |
Correct |
942 ms |
38592 KB |
Output is correct |
12 |
Correct |
1061 ms |
35248 KB |
Output is correct |
13 |
Correct |
1068 ms |
38604 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
977 ms |
36388 KB |
Output is correct |
2 |
Correct |
753 ms |
37612 KB |
Output is correct |
3 |
Correct |
1136 ms |
38136 KB |
Output is correct |
4 |
Correct |
932 ms |
36664 KB |
Output is correct |
5 |
Correct |
59 ms |
32988 KB |
Output is correct |
6 |
Correct |
1092 ms |
36492 KB |
Output is correct |
7 |
Correct |
870 ms |
36360 KB |
Output is correct |
8 |
Correct |
740 ms |
36160 KB |
Output is correct |
9 |
Correct |
638 ms |
34600 KB |
Output is correct |
10 |
Correct |
576 ms |
34632 KB |
Output is correct |
11 |
Correct |
662 ms |
37940 KB |
Output is correct |
12 |
Correct |
612 ms |
37976 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1479 ms |
35560 KB |
Output is correct |
2 |
Correct |
48 ms |
34292 KB |
Output is correct |
3 |
Correct |
169 ms |
36036 KB |
Output is correct |
4 |
Correct |
89 ms |
35860 KB |
Output is correct |
5 |
Correct |
790 ms |
38016 KB |
Output is correct |
6 |
Correct |
1474 ms |
39628 KB |
Output is correct |
7 |
Correct |
783 ms |
37820 KB |
Output is correct |
8 |
Correct |
738 ms |
37108 KB |
Output is correct |
9 |
Correct |
727 ms |
37220 KB |
Output is correct |
10 |
Correct |
766 ms |
37084 KB |
Output is correct |
11 |
Correct |
1167 ms |
38220 KB |
Output is correct |
12 |
Correct |
1055 ms |
38252 KB |
Output is correct |
13 |
Correct |
1077 ms |
38168 KB |
Output is correct |
14 |
Correct |
642 ms |
37800 KB |
Output is correct |
15 |
Correct |
689 ms |
37712 KB |
Output is correct |
16 |
Correct |
1448 ms |
39180 KB |
Output is correct |
17 |
Correct |
1459 ms |
39256 KB |
Output is correct |
18 |
Correct |
1434 ms |
39380 KB |
Output is correct |
19 |
Correct |
1411 ms |
39312 KB |
Output is correct |
20 |
Correct |
1191 ms |
38640 KB |
Output is correct |
21 |
Correct |
1180 ms |
38556 KB |
Output is correct |
22 |
Correct |
1344 ms |
39052 KB |
Output is correct |
23 |
Correct |
785 ms |
37584 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1181 ms |
36968 KB |
Output is correct |
2 |
Correct |
1205 ms |
37084 KB |
Output is correct |
3 |
Correct |
1201 ms |
36988 KB |
Output is correct |
4 |
Correct |
1324 ms |
36880 KB |
Output is correct |
5 |
Correct |
1247 ms |
37148 KB |
Output is correct |
6 |
Correct |
1786 ms |
38700 KB |
Output is correct |
7 |
Correct |
1762 ms |
38684 KB |
Output is correct |
8 |
Correct |
1769 ms |
38788 KB |
Output is correct |
9 |
Correct |
47 ms |
32964 KB |
Output is correct |
10 |
Correct |
992 ms |
38600 KB |
Output is correct |
11 |
Correct |
942 ms |
38592 KB |
Output is correct |
12 |
Correct |
1061 ms |
35248 KB |
Output is correct |
13 |
Correct |
1068 ms |
38604 KB |
Output is correct |
14 |
Correct |
977 ms |
36388 KB |
Output is correct |
15 |
Correct |
753 ms |
37612 KB |
Output is correct |
16 |
Correct |
1136 ms |
38136 KB |
Output is correct |
17 |
Correct |
932 ms |
36664 KB |
Output is correct |
18 |
Correct |
59 ms |
32988 KB |
Output is correct |
19 |
Correct |
1092 ms |
36492 KB |
Output is correct |
20 |
Correct |
870 ms |
36360 KB |
Output is correct |
21 |
Correct |
740 ms |
36160 KB |
Output is correct |
22 |
Correct |
638 ms |
34600 KB |
Output is correct |
23 |
Correct |
576 ms |
34632 KB |
Output is correct |
24 |
Correct |
662 ms |
37940 KB |
Output is correct |
25 |
Correct |
612 ms |
37976 KB |
Output is correct |
26 |
Correct |
1170 ms |
37076 KB |
Output is correct |
27 |
Correct |
1465 ms |
38604 KB |
Output is correct |
28 |
Correct |
1245 ms |
36988 KB |
Output is correct |
29 |
Correct |
895 ms |
36672 KB |
Output is correct |
30 |
Correct |
1378 ms |
38632 KB |
Output is correct |
31 |
Correct |
1415 ms |
38540 KB |
Output is correct |
32 |
Correct |
1414 ms |
38772 KB |
Output is correct |
33 |
Correct |
1215 ms |
36976 KB |
Output is correct |
34 |
Correct |
1218 ms |
36808 KB |
Output is correct |
35 |
Correct |
1234 ms |
36868 KB |
Output is correct |
36 |
Correct |
921 ms |
36744 KB |
Output is correct |
37 |
Correct |
918 ms |
36700 KB |
Output is correct |
38 |
Correct |
898 ms |
36516 KB |
Output is correct |
39 |
Correct |
755 ms |
35068 KB |
Output is correct |
40 |
Correct |
747 ms |
35200 KB |
Output is correct |
41 |
Correct |
749 ms |
35076 KB |
Output is correct |
42 |
Correct |
732 ms |
37844 KB |
Output is correct |
43 |
Correct |
748 ms |
37912 KB |
Output is correct |
44 |
Correct |
746 ms |
37956 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
15 ms |
31572 KB |
Output is correct |
2 |
Correct |
13 ms |
31572 KB |
Output is correct |
3 |
Correct |
51 ms |
34024 KB |
Output is correct |
4 |
Correct |
17 ms |
31700 KB |
Output is correct |
5 |
Correct |
54 ms |
34136 KB |
Output is correct |
6 |
Correct |
40 ms |
33748 KB |
Output is correct |
7 |
Correct |
47 ms |
34656 KB |
Output is correct |
8 |
Correct |
49 ms |
33820 KB |
Output is correct |
9 |
Correct |
59 ms |
35528 KB |
Output is correct |
10 |
Correct |
49 ms |
33996 KB |
Output is correct |
11 |
Correct |
52 ms |
33828 KB |
Output is correct |
12 |
Correct |
59 ms |
34028 KB |
Output is correct |
13 |
Correct |
56 ms |
33920 KB |
Output is correct |
14 |
Correct |
59 ms |
33884 KB |
Output is correct |
15 |
Correct |
58 ms |
33928 KB |
Output is correct |
16 |
Correct |
54 ms |
35184 KB |
Output is correct |
17 |
Correct |
55 ms |
34640 KB |
Output is correct |
18 |
Correct |
1181 ms |
36968 KB |
Output is correct |
19 |
Correct |
1205 ms |
37084 KB |
Output is correct |
20 |
Correct |
1201 ms |
36988 KB |
Output is correct |
21 |
Correct |
1324 ms |
36880 KB |
Output is correct |
22 |
Correct |
1247 ms |
37148 KB |
Output is correct |
23 |
Correct |
1786 ms |
38700 KB |
Output is correct |
24 |
Correct |
1762 ms |
38684 KB |
Output is correct |
25 |
Correct |
1769 ms |
38788 KB |
Output is correct |
26 |
Correct |
47 ms |
32964 KB |
Output is correct |
27 |
Correct |
992 ms |
38600 KB |
Output is correct |
28 |
Correct |
942 ms |
38592 KB |
Output is correct |
29 |
Correct |
1061 ms |
35248 KB |
Output is correct |
30 |
Correct |
1068 ms |
38604 KB |
Output is correct |
31 |
Correct |
977 ms |
36388 KB |
Output is correct |
32 |
Correct |
753 ms |
37612 KB |
Output is correct |
33 |
Correct |
1136 ms |
38136 KB |
Output is correct |
34 |
Correct |
932 ms |
36664 KB |
Output is correct |
35 |
Correct |
59 ms |
32988 KB |
Output is correct |
36 |
Correct |
1092 ms |
36492 KB |
Output is correct |
37 |
Correct |
870 ms |
36360 KB |
Output is correct |
38 |
Correct |
740 ms |
36160 KB |
Output is correct |
39 |
Correct |
638 ms |
34600 KB |
Output is correct |
40 |
Correct |
576 ms |
34632 KB |
Output is correct |
41 |
Correct |
662 ms |
37940 KB |
Output is correct |
42 |
Correct |
612 ms |
37976 KB |
Output is correct |
43 |
Correct |
1479 ms |
35560 KB |
Output is correct |
44 |
Correct |
48 ms |
34292 KB |
Output is correct |
45 |
Correct |
169 ms |
36036 KB |
Output is correct |
46 |
Correct |
89 ms |
35860 KB |
Output is correct |
47 |
Correct |
790 ms |
38016 KB |
Output is correct |
48 |
Correct |
1474 ms |
39628 KB |
Output is correct |
49 |
Correct |
783 ms |
37820 KB |
Output is correct |
50 |
Correct |
738 ms |
37108 KB |
Output is correct |
51 |
Correct |
727 ms |
37220 KB |
Output is correct |
52 |
Correct |
766 ms |
37084 KB |
Output is correct |
53 |
Correct |
1167 ms |
38220 KB |
Output is correct |
54 |
Correct |
1055 ms |
38252 KB |
Output is correct |
55 |
Correct |
1077 ms |
38168 KB |
Output is correct |
56 |
Correct |
642 ms |
37800 KB |
Output is correct |
57 |
Correct |
689 ms |
37712 KB |
Output is correct |
58 |
Correct |
1448 ms |
39180 KB |
Output is correct |
59 |
Correct |
1459 ms |
39256 KB |
Output is correct |
60 |
Correct |
1434 ms |
39380 KB |
Output is correct |
61 |
Correct |
1411 ms |
39312 KB |
Output is correct |
62 |
Correct |
1191 ms |
38640 KB |
Output is correct |
63 |
Correct |
1180 ms |
38556 KB |
Output is correct |
64 |
Correct |
1344 ms |
39052 KB |
Output is correct |
65 |
Correct |
785 ms |
37584 KB |
Output is correct |
66 |
Correct |
1170 ms |
37076 KB |
Output is correct |
67 |
Correct |
1465 ms |
38604 KB |
Output is correct |
68 |
Correct |
1245 ms |
36988 KB |
Output is correct |
69 |
Correct |
895 ms |
36672 KB |
Output is correct |
70 |
Correct |
1378 ms |
38632 KB |
Output is correct |
71 |
Correct |
1415 ms |
38540 KB |
Output is correct |
72 |
Correct |
1414 ms |
38772 KB |
Output is correct |
73 |
Correct |
1215 ms |
36976 KB |
Output is correct |
74 |
Correct |
1218 ms |
36808 KB |
Output is correct |
75 |
Correct |
1234 ms |
36868 KB |
Output is correct |
76 |
Correct |
921 ms |
36744 KB |
Output is correct |
77 |
Correct |
918 ms |
36700 KB |
Output is correct |
78 |
Correct |
898 ms |
36516 KB |
Output is correct |
79 |
Correct |
755 ms |
35068 KB |
Output is correct |
80 |
Correct |
747 ms |
35200 KB |
Output is correct |
81 |
Correct |
749 ms |
35076 KB |
Output is correct |
82 |
Correct |
732 ms |
37844 KB |
Output is correct |
83 |
Correct |
748 ms |
37912 KB |
Output is correct |
84 |
Correct |
746 ms |
37956 KB |
Output is correct |
85 |
Correct |
1851 ms |
41828 KB |
Output is correct |
86 |
Correct |
192 ms |
37884 KB |
Output is correct |
87 |
Correct |
127 ms |
39232 KB |
Output is correct |
88 |
Correct |
1098 ms |
42228 KB |
Output is correct |
89 |
Correct |
1798 ms |
42232 KB |
Output is correct |
90 |
Correct |
1104 ms |
41756 KB |
Output is correct |
91 |
Correct |
1247 ms |
39660 KB |
Output is correct |
92 |
Correct |
1225 ms |
39612 KB |
Output is correct |
93 |
Correct |
1742 ms |
40984 KB |
Output is correct |
94 |
Correct |
1503 ms |
40792 KB |
Output is correct |
95 |
Correct |
1509 ms |
40952 KB |
Output is correct |
96 |
Correct |
1816 ms |
42360 KB |
Output is correct |
97 |
Correct |
827 ms |
38756 KB |
Output is correct |
98 |
Correct |
934 ms |
41720 KB |
Output is correct |
99 |
Correct |
1916 ms |
42068 KB |
Output is correct |
100 |
Correct |
1872 ms |
41664 KB |
Output is correct |
101 |
Correct |
1843 ms |
41940 KB |
Output is correct |
102 |
Correct |
1837 ms |
42028 KB |
Output is correct |
103 |
Correct |
2007 ms |
42752 KB |
Output is correct |
104 |
Correct |
2004 ms |
42680 KB |
Output is correct |
105 |
Correct |
1462 ms |
42492 KB |
Output is correct |
106 |
Correct |
1207 ms |
42436 KB |
Output is correct |
107 |
Correct |
1393 ms |
39280 KB |
Output is correct |
108 |
Correct |
1875 ms |
41780 KB |
Output is correct |
109 |
Correct |
1377 ms |
41328 KB |
Output is correct |