# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
284530 |
2020-08-27T14:59:51 Z |
WLZ |
Bridges (APIO19_bridges) |
C++14 |
|
2338 ms |
16660 KB |
#include <bits/stdc++.h>
using namespace std;
struct dsu {
private: vector<int> p, sz;
public:
dsu(int n) {
p.assign(n, -1);
sz.assign(n, 1);
}
int root(int x) {
if (p[x] < 0) {
return x;
}
return (p[x] = root(p[x]));
}
bool same_set(int x, int y) {
return (root(x) == root(y));
}
void connect(int x, int y) {
x = root(x); y = root(y);
if (x != y) {
if (sz[x] > sz[y]) {
p[y] = x;
sz[x] += sz[y];
} else {
p[x] = y;
sz[y] += sz[x];
}
}
}
int set_sz(int x) {
return sz[root(x)];
}
};
struct edge {
int u, v, d, idx;
};
struct query {
int type, x, y, idx;
};
vector<int> was;
vector< vector<int> > g;
dsu conn(0);
int cnt = 0;
int dfs(int u) {
was[u] = cnt;
int ans = conn.set_sz(u);
for (auto& v : g[u]) {
if (was[v] != cnt) {
ans += dfs(v);
}
}
return ans;
}
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
int n, m;
cin >> n >> m;
vector<edge> edges(m);
vector<int> after(m);
for (int i = 0; i < m; i++) {
cin >> edges[i].u >> edges[i].v >> edges[i].d;
edges[i].idx = i;
after[i] = edges[i].d;
}
vector<edge> unsorted_edges(edges);
int q;
cin >> q;
vector<query> queries(q);
for (int i = 0; i < q; i++) {
cin >> queries[i].type >> queries[i].x >> queries[i].y;
queries[i].idx = i;
}
sort(edges.begin(), edges.end(), [](const edge &a, const edge &b) {
return a.d > b.d;
});
const int k = floor(sqrt(q));
vector<int> ans(q, -1);
g.resize(n + 1);
was.assign(n + 1, -1);
for (int i = 0; i < q; i += k) {
conn = dsu(n + 1);
vector<query> q1, q2;
vector<bool> use(m, true);
for (int j = i; j < min(q, i + k); j++) {
if (queries[j].type == 1) {
q2.push_back(queries[j]);
use[queries[j].x - 1] = false;
} else {
q1.push_back(queries[j]);
}
}
sort(q1.begin(), q1.end(), [](const query &a, const query &b) {
return a.y > b.y;
});
int ptr = 0;
for (int j = 0; j < (int) q1.size(); j++) {
while (ptr < m && edges[ptr].d >= q1[j].y) {
if (use[edges[ptr].idx]) {
conn.connect(edges[ptr].u, edges[ptr].v);
}
ptr++;
}
for (int t = 0; t < (int) q2.size(); t++) {
if (q2[t].idx > q1[j].idx) {
break;
}
after[q2[t].x - 1] = q2[t].y;
}
for (int t = 0; t < (int) q2.size(); t++) {
if (after[q2[t].x - 1] >= q1[j].y) {
int u = conn.root(unsorted_edges[q2[t].x - 1].u);
int v = conn.root(unsorted_edges[q2[t].x - 1].v);
g[u].push_back(v);
g[v].push_back(u);
}
}
ans[q1[j].idx] = dfs(conn.root(q1[j].x));
cnt++;
for (int t = 0; t < (int) q2.size(); t++) {
if (after[q2[t].x - 1] >= q1[j].y) {
int u = conn.root(unsorted_edges[q2[t].x - 1].u);
int v = conn.root(unsorted_edges[q2[t].x - 1].v);
g[u].clear();
g[v].clear();
}
after[q2[t].x - 1] = unsorted_edges[q2[t].x - 1].d;
}
}
vector<edge> changed, not_changed;
for (int j = 0; j < (int) q2.size(); j++) {
unsorted_edges[q2[j].x - 1].d = after[q2[j].x - 1] = q2[j].y;
}
for (int j = 0; j < m; j++) {
if (use[edges[j].idx]) {
not_changed.push_back(edges[j]);
} else {
changed.push_back(unsorted_edges[edges[j].idx]);
}
}
sort(changed.begin(), changed.end(), [](const edge &a, const edge &b) {
return a.d > b.d;
});
edges.clear();
int j = 0, t = 0;
while (j < (int) not_changed.size() || t < (int) changed.size()) {
if (j == (int) not_changed.size()) {
edges.push_back(changed[t++]);
} else if (t == (int) changed.size()) {
edges.push_back(not_changed[j++]);
} else if (not_changed[j].d > changed[t].d) {
edges.push_back(not_changed[j++]);
} else {
edges.push_back(changed[t++]);
}
}
}
for (int i = 0; i < q; i++) {
if (ans[i] != -1) {
cout << ans[i] << '\n';
}
}
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
384 KB |
Output is correct |
2 |
Correct |
0 ms |
384 KB |
Output is correct |
3 |
Correct |
16 ms |
896 KB |
Output is correct |
4 |
Correct |
4 ms |
768 KB |
Output is correct |
5 |
Correct |
14 ms |
768 KB |
Output is correct |
6 |
Correct |
13 ms |
768 KB |
Output is correct |
7 |
Correct |
14 ms |
640 KB |
Output is correct |
8 |
Correct |
14 ms |
768 KB |
Output is correct |
9 |
Correct |
17 ms |
640 KB |
Output is correct |
10 |
Correct |
14 ms |
768 KB |
Output is correct |
11 |
Correct |
13 ms |
768 KB |
Output is correct |
12 |
Correct |
15 ms |
768 KB |
Output is correct |
13 |
Correct |
16 ms |
768 KB |
Output is correct |
14 |
Correct |
15 ms |
768 KB |
Output is correct |
15 |
Correct |
17 ms |
768 KB |
Output is correct |
16 |
Correct |
15 ms |
640 KB |
Output is correct |
17 |
Correct |
24 ms |
640 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1131 ms |
11916 KB |
Output is correct |
2 |
Correct |
1091 ms |
12124 KB |
Output is correct |
3 |
Correct |
1137 ms |
12032 KB |
Output is correct |
4 |
Correct |
1103 ms |
12256 KB |
Output is correct |
5 |
Correct |
1160 ms |
12256 KB |
Output is correct |
6 |
Correct |
1417 ms |
11060 KB |
Output is correct |
7 |
Correct |
1418 ms |
10932 KB |
Output is correct |
8 |
Correct |
1368 ms |
11264 KB |
Output is correct |
9 |
Correct |
39 ms |
3832 KB |
Output is correct |
10 |
Correct |
1138 ms |
10968 KB |
Output is correct |
11 |
Correct |
1109 ms |
10900 KB |
Output is correct |
12 |
Correct |
828 ms |
10904 KB |
Output is correct |
13 |
Correct |
984 ms |
11092 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
842 ms |
9212 KB |
Output is correct |
2 |
Correct |
658 ms |
5468 KB |
Output is correct |
3 |
Correct |
996 ms |
9228 KB |
Output is correct |
4 |
Correct |
908 ms |
9156 KB |
Output is correct |
5 |
Correct |
39 ms |
3832 KB |
Output is correct |
6 |
Correct |
940 ms |
9020 KB |
Output is correct |
7 |
Correct |
780 ms |
9164 KB |
Output is correct |
8 |
Correct |
712 ms |
9404 KB |
Output is correct |
9 |
Correct |
576 ms |
8928 KB |
Output is correct |
10 |
Correct |
531 ms |
8696 KB |
Output is correct |
11 |
Correct |
622 ms |
9104 KB |
Output is correct |
12 |
Correct |
570 ms |
9336 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1739 ms |
15672 KB |
Output is correct |
2 |
Correct |
53 ms |
3960 KB |
Output is correct |
3 |
Correct |
377 ms |
9756 KB |
Output is correct |
4 |
Correct |
356 ms |
9816 KB |
Output is correct |
5 |
Correct |
1612 ms |
14244 KB |
Output is correct |
6 |
Correct |
1700 ms |
15656 KB |
Output is correct |
7 |
Correct |
1599 ms |
14116 KB |
Output is correct |
8 |
Correct |
880 ms |
10692 KB |
Output is correct |
9 |
Correct |
884 ms |
10980 KB |
Output is correct |
10 |
Correct |
916 ms |
10744 KB |
Output is correct |
11 |
Correct |
1643 ms |
13564 KB |
Output is correct |
12 |
Correct |
1592 ms |
13820 KB |
Output is correct |
13 |
Correct |
1580 ms |
13708 KB |
Output is correct |
14 |
Correct |
1615 ms |
14180 KB |
Output is correct |
15 |
Correct |
1626 ms |
14404 KB |
Output is correct |
16 |
Correct |
1905 ms |
15620 KB |
Output is correct |
17 |
Correct |
1901 ms |
15804 KB |
Output is correct |
18 |
Correct |
1853 ms |
15556 KB |
Output is correct |
19 |
Correct |
1856 ms |
15676 KB |
Output is correct |
20 |
Correct |
1790 ms |
14460 KB |
Output is correct |
21 |
Correct |
1744 ms |
14352 KB |
Output is correct |
22 |
Correct |
1815 ms |
15456 KB |
Output is correct |
23 |
Correct |
1580 ms |
12916 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1131 ms |
11916 KB |
Output is correct |
2 |
Correct |
1091 ms |
12124 KB |
Output is correct |
3 |
Correct |
1137 ms |
12032 KB |
Output is correct |
4 |
Correct |
1103 ms |
12256 KB |
Output is correct |
5 |
Correct |
1160 ms |
12256 KB |
Output is correct |
6 |
Correct |
1417 ms |
11060 KB |
Output is correct |
7 |
Correct |
1418 ms |
10932 KB |
Output is correct |
8 |
Correct |
1368 ms |
11264 KB |
Output is correct |
9 |
Correct |
39 ms |
3832 KB |
Output is correct |
10 |
Correct |
1138 ms |
10968 KB |
Output is correct |
11 |
Correct |
1109 ms |
10900 KB |
Output is correct |
12 |
Correct |
828 ms |
10904 KB |
Output is correct |
13 |
Correct |
984 ms |
11092 KB |
Output is correct |
14 |
Correct |
842 ms |
9212 KB |
Output is correct |
15 |
Correct |
658 ms |
5468 KB |
Output is correct |
16 |
Correct |
996 ms |
9228 KB |
Output is correct |
17 |
Correct |
908 ms |
9156 KB |
Output is correct |
18 |
Correct |
39 ms |
3832 KB |
Output is correct |
19 |
Correct |
940 ms |
9020 KB |
Output is correct |
20 |
Correct |
780 ms |
9164 KB |
Output is correct |
21 |
Correct |
712 ms |
9404 KB |
Output is correct |
22 |
Correct |
576 ms |
8928 KB |
Output is correct |
23 |
Correct |
531 ms |
8696 KB |
Output is correct |
24 |
Correct |
622 ms |
9104 KB |
Output is correct |
25 |
Correct |
570 ms |
9336 KB |
Output is correct |
26 |
Correct |
1099 ms |
12020 KB |
Output is correct |
27 |
Correct |
1338 ms |
12048 KB |
Output is correct |
28 |
Correct |
1157 ms |
12192 KB |
Output is correct |
29 |
Correct |
925 ms |
12032 KB |
Output is correct |
30 |
Correct |
1309 ms |
11876 KB |
Output is correct |
31 |
Correct |
1289 ms |
12292 KB |
Output is correct |
32 |
Correct |
1310 ms |
12048 KB |
Output is correct |
33 |
Correct |
1146 ms |
12392 KB |
Output is correct |
34 |
Correct |
1161 ms |
12052 KB |
Output is correct |
35 |
Correct |
1087 ms |
12220 KB |
Output is correct |
36 |
Correct |
972 ms |
12044 KB |
Output is correct |
37 |
Correct |
971 ms |
12224 KB |
Output is correct |
38 |
Correct |
995 ms |
12100 KB |
Output is correct |
39 |
Correct |
840 ms |
11504 KB |
Output is correct |
40 |
Correct |
826 ms |
11336 KB |
Output is correct |
41 |
Correct |
827 ms |
11452 KB |
Output is correct |
42 |
Correct |
820 ms |
12208 KB |
Output is correct |
43 |
Correct |
723 ms |
12088 KB |
Output is correct |
44 |
Correct |
761 ms |
12036 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
384 KB |
Output is correct |
2 |
Correct |
0 ms |
384 KB |
Output is correct |
3 |
Correct |
16 ms |
896 KB |
Output is correct |
4 |
Correct |
4 ms |
768 KB |
Output is correct |
5 |
Correct |
14 ms |
768 KB |
Output is correct |
6 |
Correct |
13 ms |
768 KB |
Output is correct |
7 |
Correct |
14 ms |
640 KB |
Output is correct |
8 |
Correct |
14 ms |
768 KB |
Output is correct |
9 |
Correct |
17 ms |
640 KB |
Output is correct |
10 |
Correct |
14 ms |
768 KB |
Output is correct |
11 |
Correct |
13 ms |
768 KB |
Output is correct |
12 |
Correct |
15 ms |
768 KB |
Output is correct |
13 |
Correct |
16 ms |
768 KB |
Output is correct |
14 |
Correct |
15 ms |
768 KB |
Output is correct |
15 |
Correct |
17 ms |
768 KB |
Output is correct |
16 |
Correct |
15 ms |
640 KB |
Output is correct |
17 |
Correct |
24 ms |
640 KB |
Output is correct |
18 |
Correct |
1131 ms |
11916 KB |
Output is correct |
19 |
Correct |
1091 ms |
12124 KB |
Output is correct |
20 |
Correct |
1137 ms |
12032 KB |
Output is correct |
21 |
Correct |
1103 ms |
12256 KB |
Output is correct |
22 |
Correct |
1160 ms |
12256 KB |
Output is correct |
23 |
Correct |
1417 ms |
11060 KB |
Output is correct |
24 |
Correct |
1418 ms |
10932 KB |
Output is correct |
25 |
Correct |
1368 ms |
11264 KB |
Output is correct |
26 |
Correct |
39 ms |
3832 KB |
Output is correct |
27 |
Correct |
1138 ms |
10968 KB |
Output is correct |
28 |
Correct |
1109 ms |
10900 KB |
Output is correct |
29 |
Correct |
828 ms |
10904 KB |
Output is correct |
30 |
Correct |
984 ms |
11092 KB |
Output is correct |
31 |
Correct |
842 ms |
9212 KB |
Output is correct |
32 |
Correct |
658 ms |
5468 KB |
Output is correct |
33 |
Correct |
996 ms |
9228 KB |
Output is correct |
34 |
Correct |
908 ms |
9156 KB |
Output is correct |
35 |
Correct |
39 ms |
3832 KB |
Output is correct |
36 |
Correct |
940 ms |
9020 KB |
Output is correct |
37 |
Correct |
780 ms |
9164 KB |
Output is correct |
38 |
Correct |
712 ms |
9404 KB |
Output is correct |
39 |
Correct |
576 ms |
8928 KB |
Output is correct |
40 |
Correct |
531 ms |
8696 KB |
Output is correct |
41 |
Correct |
622 ms |
9104 KB |
Output is correct |
42 |
Correct |
570 ms |
9336 KB |
Output is correct |
43 |
Correct |
1739 ms |
15672 KB |
Output is correct |
44 |
Correct |
53 ms |
3960 KB |
Output is correct |
45 |
Correct |
377 ms |
9756 KB |
Output is correct |
46 |
Correct |
356 ms |
9816 KB |
Output is correct |
47 |
Correct |
1612 ms |
14244 KB |
Output is correct |
48 |
Correct |
1700 ms |
15656 KB |
Output is correct |
49 |
Correct |
1599 ms |
14116 KB |
Output is correct |
50 |
Correct |
880 ms |
10692 KB |
Output is correct |
51 |
Correct |
884 ms |
10980 KB |
Output is correct |
52 |
Correct |
916 ms |
10744 KB |
Output is correct |
53 |
Correct |
1643 ms |
13564 KB |
Output is correct |
54 |
Correct |
1592 ms |
13820 KB |
Output is correct |
55 |
Correct |
1580 ms |
13708 KB |
Output is correct |
56 |
Correct |
1615 ms |
14180 KB |
Output is correct |
57 |
Correct |
1626 ms |
14404 KB |
Output is correct |
58 |
Correct |
1905 ms |
15620 KB |
Output is correct |
59 |
Correct |
1901 ms |
15804 KB |
Output is correct |
60 |
Correct |
1853 ms |
15556 KB |
Output is correct |
61 |
Correct |
1856 ms |
15676 KB |
Output is correct |
62 |
Correct |
1790 ms |
14460 KB |
Output is correct |
63 |
Correct |
1744 ms |
14352 KB |
Output is correct |
64 |
Correct |
1815 ms |
15456 KB |
Output is correct |
65 |
Correct |
1580 ms |
12916 KB |
Output is correct |
66 |
Correct |
1099 ms |
12020 KB |
Output is correct |
67 |
Correct |
1338 ms |
12048 KB |
Output is correct |
68 |
Correct |
1157 ms |
12192 KB |
Output is correct |
69 |
Correct |
925 ms |
12032 KB |
Output is correct |
70 |
Correct |
1309 ms |
11876 KB |
Output is correct |
71 |
Correct |
1289 ms |
12292 KB |
Output is correct |
72 |
Correct |
1310 ms |
12048 KB |
Output is correct |
73 |
Correct |
1146 ms |
12392 KB |
Output is correct |
74 |
Correct |
1161 ms |
12052 KB |
Output is correct |
75 |
Correct |
1087 ms |
12220 KB |
Output is correct |
76 |
Correct |
972 ms |
12044 KB |
Output is correct |
77 |
Correct |
971 ms |
12224 KB |
Output is correct |
78 |
Correct |
995 ms |
12100 KB |
Output is correct |
79 |
Correct |
840 ms |
11504 KB |
Output is correct |
80 |
Correct |
826 ms |
11336 KB |
Output is correct |
81 |
Correct |
827 ms |
11452 KB |
Output is correct |
82 |
Correct |
820 ms |
12208 KB |
Output is correct |
83 |
Correct |
723 ms |
12088 KB |
Output is correct |
84 |
Correct |
761 ms |
12036 KB |
Output is correct |
85 |
Correct |
1604 ms |
16604 KB |
Output is correct |
86 |
Correct |
373 ms |
9716 KB |
Output is correct |
87 |
Correct |
351 ms |
9888 KB |
Output is correct |
88 |
Correct |
1702 ms |
15136 KB |
Output is correct |
89 |
Correct |
1622 ms |
16484 KB |
Output is correct |
90 |
Correct |
1515 ms |
15096 KB |
Output is correct |
91 |
Correct |
1245 ms |
11828 KB |
Output is correct |
92 |
Correct |
1176 ms |
12348 KB |
Output is correct |
93 |
Correct |
1429 ms |
11176 KB |
Output is correct |
94 |
Correct |
1634 ms |
14916 KB |
Output is correct |
95 |
Correct |
1601 ms |
14936 KB |
Output is correct |
96 |
Correct |
1801 ms |
14244 KB |
Output is correct |
97 |
Correct |
1605 ms |
14100 KB |
Output is correct |
98 |
Correct |
1613 ms |
14668 KB |
Output is correct |
99 |
Correct |
1844 ms |
16344 KB |
Output is correct |
100 |
Correct |
1913 ms |
16536 KB |
Output is correct |
101 |
Correct |
1782 ms |
16440 KB |
Output is correct |
102 |
Correct |
1957 ms |
16660 KB |
Output is correct |
103 |
Correct |
2130 ms |
14216 KB |
Output is correct |
104 |
Correct |
2071 ms |
14268 KB |
Output is correct |
105 |
Correct |
1613 ms |
14356 KB |
Output is correct |
106 |
Correct |
1317 ms |
13928 KB |
Output is correct |
107 |
Correct |
1445 ms |
14392 KB |
Output is correct |
108 |
Correct |
2338 ms |
15480 KB |
Output is correct |
109 |
Correct |
1908 ms |
12832 KB |
Output is correct |