# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
511234 |
2022-01-15T12:53:29 Z |
blue |
Bridges (APIO19_bridges) |
C++17 |
|
2943 ms |
9828 KB |
#include <iostream>
#include <vector>
#include <algorithm>
#include <set>
using namespace std;
using vi = vector<int>;
const int rt = 950;
int n, m;
vi u, v, w;
int q;
vi t;
vi b, r;
vi s, c;
struct disjoint_set
{
vi parent;
vi subtree;
vector<int> changes;
disjoint_set()
{
parent = vi(1+n);
subtree = vi(1+n, 1);
for(int i = 0; i <= n; i++) parent[i] = i;
}
int root(int u)
{
while(parent[u] != u) u = parent[u];
return u;
}
void join(int u, int v)
{
u = root(u);
v = root(v);
if(u == v)
{
// cerr << "change rejected\n";
changes.push_back(0);
}
else
{
if(subtree[u] < subtree[v]) swap(u, v);
parent[v] = u;
subtree[u] += subtree[v];
changes.push_back(v);
// cerr << "making " << u << " parent of " << v << '\n';
}
}
void rollback()
{
int c = changes.back();
changes.pop_back();
subtree[parent[c]] -= subtree[c];
parent[c] = c;
}
int reach(int u)
{
return subtree[root(u)];
}
};
int wt(int d)
{
if(d > 0)
{
return w[d];
}
else
{
return c[-d];
}
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cin >> n >> m;
u = v = w = vi(1+m);
for(int e = 1; e <= m; e++) cin >> u[e] >> v[e] >> w[e];
cin >> q;
t = b = r = s = c = vi(q);
for(int j = 0; j < q; j++)
{
cin >> t[j];
if(t[j] == 1) cin >> b[j] >> r[j];
else cin >> s[j] >> c[j];
}
vi ans(q, -1);
vi temp_edge_found(1+m, 0);
for(int bl = 0; bl <= (q-1)/rt; bl++)
{
int y = rt*bl;
int z = min(rt*(bl+1)-1, q-1);
// cerr << "current block = " << y << ' ' << z << '\n';
vi mod(1+m);
for(int j = y; j <= z; j++)
if(t[j] == 1)
mod[b[j]] = 1;
vi ops;
for(int e = 1; e <= m; e++)
if(!mod[e])
ops.push_back(e);
for(int j = y; j <= z; j++)
if(t[j] == 2)
ops.push_back(-j);
sort(ops.begin(), ops.end(), [] (int d, int f)
{
int wd = wt(d), wf = wt(f);
if(wd != wf) return wd > wf;
else return d > f;
});
disjoint_set dsu;
for(int o: ops)
{
// cerr << "\n\n\n";
if(o > 0)
{
dsu.join(u[o], v[o]);
// cerr << "general join: " << o << '\n';
}
else
{
int qr = -o;
int curr_ct = 0;
// cerr << "answering query : " << qr << '\n';
for(int l = qr-1; l >= y; l--)
{
if(t[l] == 2) continue;
if(temp_edge_found[b[l]]) continue;
temp_edge_found[b[l]] = 1;
if(r[l] >= c[qr])
{
// cerr << "query specific join 1: " << b[l] << '\n';
dsu.join(u[b[l]], v[b[l]]);
curr_ct++;
}
}
for(int l = qr+1; l <= z; l++)
{
// cerr << "l = " << l << '\n';
if(t[l] == 2) continue;
if(temp_edge_found[b[l]]) continue;
// cerr << "success!\n";
temp_edge_found[b[l]] = 1;
// cerr << b[l] << " > " << w[b[l]] << ' ' << c[qr] << '\n';
if(w[b[l]] >= c[qr])
{
// cerr << "query specific join 2: " << b[l] << '\n';
dsu.join(u[b[l]], v[b[l]]);
curr_ct++;
}
}
ans[qr] = dsu.reach(s[qr]);
for(int ct = 0; ct < curr_ct; ct++)
{
// cerr << "rollback\n";
dsu.rollback();
}
for(int l = y; l <= z; l++)
{
if(t[l] == 1)
{
temp_edge_found[b[l]] = 0;
}
}
}
}
for(int l = y; l <= z; l++)
{
if(t[l] == 1)
{
w[b[l]] = r[l];
}
}
}
for(int j = 0; j < q; j++)
if(t[j] == 2)
cout << ans[j] << '\n';
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
204 KB |
Output is correct |
2 |
Correct |
0 ms |
204 KB |
Output is correct |
3 |
Correct |
63 ms |
568 KB |
Output is correct |
4 |
Correct |
21 ms |
552 KB |
Output is correct |
5 |
Correct |
42 ms |
548 KB |
Output is correct |
6 |
Correct |
37 ms |
552 KB |
Output is correct |
7 |
Correct |
36 ms |
528 KB |
Output is correct |
8 |
Correct |
40 ms |
544 KB |
Output is correct |
9 |
Correct |
36 ms |
528 KB |
Output is correct |
10 |
Correct |
43 ms |
544 KB |
Output is correct |
11 |
Correct |
38 ms |
532 KB |
Output is correct |
12 |
Correct |
41 ms |
536 KB |
Output is correct |
13 |
Correct |
59 ms |
544 KB |
Output is correct |
14 |
Correct |
54 ms |
536 KB |
Output is correct |
15 |
Correct |
43 ms |
540 KB |
Output is correct |
16 |
Correct |
37 ms |
560 KB |
Output is correct |
17 |
Correct |
38 ms |
548 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1737 ms |
4844 KB |
Output is correct |
2 |
Correct |
1731 ms |
4936 KB |
Output is correct |
3 |
Correct |
1797 ms |
4772 KB |
Output is correct |
4 |
Correct |
1931 ms |
4756 KB |
Output is correct |
5 |
Correct |
1920 ms |
4792 KB |
Output is correct |
6 |
Correct |
2688 ms |
4744 KB |
Output is correct |
7 |
Correct |
2696 ms |
4732 KB |
Output is correct |
8 |
Correct |
2610 ms |
4748 KB |
Output is correct |
9 |
Correct |
188 ms |
2792 KB |
Output is correct |
10 |
Correct |
1744 ms |
4752 KB |
Output is correct |
11 |
Correct |
1629 ms |
4816 KB |
Output is correct |
12 |
Correct |
1631 ms |
4712 KB |
Output is correct |
13 |
Correct |
1424 ms |
4740 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1354 ms |
4056 KB |
Output is correct |
2 |
Correct |
1048 ms |
3108 KB |
Output is correct |
3 |
Correct |
1511 ms |
4012 KB |
Output is correct |
4 |
Correct |
1376 ms |
3956 KB |
Output is correct |
5 |
Correct |
163 ms |
2792 KB |
Output is correct |
6 |
Correct |
1526 ms |
3984 KB |
Output is correct |
7 |
Correct |
1346 ms |
4100 KB |
Output is correct |
8 |
Correct |
1156 ms |
3980 KB |
Output is correct |
9 |
Correct |
1010 ms |
3976 KB |
Output is correct |
10 |
Correct |
948 ms |
3976 KB |
Output is correct |
11 |
Correct |
894 ms |
4008 KB |
Output is correct |
12 |
Correct |
773 ms |
3960 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1937 ms |
6376 KB |
Output is correct |
2 |
Correct |
153 ms |
2800 KB |
Output is correct |
3 |
Correct |
206 ms |
4200 KB |
Output is correct |
4 |
Correct |
231 ms |
4072 KB |
Output is correct |
5 |
Correct |
1665 ms |
6456 KB |
Output is correct |
6 |
Correct |
1993 ms |
6384 KB |
Output is correct |
7 |
Correct |
1836 ms |
6408 KB |
Output is correct |
8 |
Correct |
1038 ms |
4840 KB |
Output is correct |
9 |
Correct |
996 ms |
4768 KB |
Output is correct |
10 |
Correct |
971 ms |
4756 KB |
Output is correct |
11 |
Correct |
1535 ms |
5704 KB |
Output is correct |
12 |
Correct |
1488 ms |
5704 KB |
Output is correct |
13 |
Correct |
1622 ms |
5740 KB |
Output is correct |
14 |
Correct |
1475 ms |
6372 KB |
Output is correct |
15 |
Correct |
1796 ms |
6456 KB |
Output is correct |
16 |
Correct |
2009 ms |
6364 KB |
Output is correct |
17 |
Correct |
2221 ms |
6456 KB |
Output is correct |
18 |
Correct |
2217 ms |
6560 KB |
Output is correct |
19 |
Correct |
2207 ms |
6580 KB |
Output is correct |
20 |
Correct |
1782 ms |
5968 KB |
Output is correct |
21 |
Correct |
1726 ms |
6156 KB |
Output is correct |
22 |
Correct |
1887 ms |
6188 KB |
Output is correct |
23 |
Correct |
1663 ms |
5804 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1737 ms |
4844 KB |
Output is correct |
2 |
Correct |
1731 ms |
4936 KB |
Output is correct |
3 |
Correct |
1797 ms |
4772 KB |
Output is correct |
4 |
Correct |
1931 ms |
4756 KB |
Output is correct |
5 |
Correct |
1920 ms |
4792 KB |
Output is correct |
6 |
Correct |
2688 ms |
4744 KB |
Output is correct |
7 |
Correct |
2696 ms |
4732 KB |
Output is correct |
8 |
Correct |
2610 ms |
4748 KB |
Output is correct |
9 |
Correct |
188 ms |
2792 KB |
Output is correct |
10 |
Correct |
1744 ms |
4752 KB |
Output is correct |
11 |
Correct |
1629 ms |
4816 KB |
Output is correct |
12 |
Correct |
1631 ms |
4712 KB |
Output is correct |
13 |
Correct |
1424 ms |
4740 KB |
Output is correct |
14 |
Correct |
1354 ms |
4056 KB |
Output is correct |
15 |
Correct |
1048 ms |
3108 KB |
Output is correct |
16 |
Correct |
1511 ms |
4012 KB |
Output is correct |
17 |
Correct |
1376 ms |
3956 KB |
Output is correct |
18 |
Correct |
163 ms |
2792 KB |
Output is correct |
19 |
Correct |
1526 ms |
3984 KB |
Output is correct |
20 |
Correct |
1346 ms |
4100 KB |
Output is correct |
21 |
Correct |
1156 ms |
3980 KB |
Output is correct |
22 |
Correct |
1010 ms |
3976 KB |
Output is correct |
23 |
Correct |
948 ms |
3976 KB |
Output is correct |
24 |
Correct |
894 ms |
4008 KB |
Output is correct |
25 |
Correct |
773 ms |
3960 KB |
Output is correct |
26 |
Correct |
1809 ms |
4844 KB |
Output is correct |
27 |
Correct |
2282 ms |
4852 KB |
Output is correct |
28 |
Correct |
1948 ms |
4848 KB |
Output is correct |
29 |
Correct |
1450 ms |
4824 KB |
Output is correct |
30 |
Correct |
2234 ms |
4852 KB |
Output is correct |
31 |
Correct |
2280 ms |
5008 KB |
Output is correct |
32 |
Correct |
2285 ms |
4748 KB |
Output is correct |
33 |
Correct |
1894 ms |
4804 KB |
Output is correct |
34 |
Correct |
1966 ms |
4888 KB |
Output is correct |
35 |
Correct |
1950 ms |
4832 KB |
Output is correct |
36 |
Correct |
1663 ms |
4808 KB |
Output is correct |
37 |
Correct |
1574 ms |
4720 KB |
Output is correct |
38 |
Correct |
1545 ms |
4836 KB |
Output is correct |
39 |
Correct |
1390 ms |
4756 KB |
Output is correct |
40 |
Correct |
1323 ms |
4784 KB |
Output is correct |
41 |
Correct |
1502 ms |
4716 KB |
Output is correct |
42 |
Correct |
1147 ms |
4788 KB |
Output is correct |
43 |
Correct |
1118 ms |
4788 KB |
Output is correct |
44 |
Correct |
1127 ms |
4756 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
204 KB |
Output is correct |
2 |
Correct |
0 ms |
204 KB |
Output is correct |
3 |
Correct |
63 ms |
568 KB |
Output is correct |
4 |
Correct |
21 ms |
552 KB |
Output is correct |
5 |
Correct |
42 ms |
548 KB |
Output is correct |
6 |
Correct |
37 ms |
552 KB |
Output is correct |
7 |
Correct |
36 ms |
528 KB |
Output is correct |
8 |
Correct |
40 ms |
544 KB |
Output is correct |
9 |
Correct |
36 ms |
528 KB |
Output is correct |
10 |
Correct |
43 ms |
544 KB |
Output is correct |
11 |
Correct |
38 ms |
532 KB |
Output is correct |
12 |
Correct |
41 ms |
536 KB |
Output is correct |
13 |
Correct |
59 ms |
544 KB |
Output is correct |
14 |
Correct |
54 ms |
536 KB |
Output is correct |
15 |
Correct |
43 ms |
540 KB |
Output is correct |
16 |
Correct |
37 ms |
560 KB |
Output is correct |
17 |
Correct |
38 ms |
548 KB |
Output is correct |
18 |
Correct |
1737 ms |
4844 KB |
Output is correct |
19 |
Correct |
1731 ms |
4936 KB |
Output is correct |
20 |
Correct |
1797 ms |
4772 KB |
Output is correct |
21 |
Correct |
1931 ms |
4756 KB |
Output is correct |
22 |
Correct |
1920 ms |
4792 KB |
Output is correct |
23 |
Correct |
2688 ms |
4744 KB |
Output is correct |
24 |
Correct |
2696 ms |
4732 KB |
Output is correct |
25 |
Correct |
2610 ms |
4748 KB |
Output is correct |
26 |
Correct |
188 ms |
2792 KB |
Output is correct |
27 |
Correct |
1744 ms |
4752 KB |
Output is correct |
28 |
Correct |
1629 ms |
4816 KB |
Output is correct |
29 |
Correct |
1631 ms |
4712 KB |
Output is correct |
30 |
Correct |
1424 ms |
4740 KB |
Output is correct |
31 |
Correct |
1354 ms |
4056 KB |
Output is correct |
32 |
Correct |
1048 ms |
3108 KB |
Output is correct |
33 |
Correct |
1511 ms |
4012 KB |
Output is correct |
34 |
Correct |
1376 ms |
3956 KB |
Output is correct |
35 |
Correct |
163 ms |
2792 KB |
Output is correct |
36 |
Correct |
1526 ms |
3984 KB |
Output is correct |
37 |
Correct |
1346 ms |
4100 KB |
Output is correct |
38 |
Correct |
1156 ms |
3980 KB |
Output is correct |
39 |
Correct |
1010 ms |
3976 KB |
Output is correct |
40 |
Correct |
948 ms |
3976 KB |
Output is correct |
41 |
Correct |
894 ms |
4008 KB |
Output is correct |
42 |
Correct |
773 ms |
3960 KB |
Output is correct |
43 |
Correct |
1937 ms |
6376 KB |
Output is correct |
44 |
Correct |
153 ms |
2800 KB |
Output is correct |
45 |
Correct |
206 ms |
4200 KB |
Output is correct |
46 |
Correct |
231 ms |
4072 KB |
Output is correct |
47 |
Correct |
1665 ms |
6456 KB |
Output is correct |
48 |
Correct |
1993 ms |
6384 KB |
Output is correct |
49 |
Correct |
1836 ms |
6408 KB |
Output is correct |
50 |
Correct |
1038 ms |
4840 KB |
Output is correct |
51 |
Correct |
996 ms |
4768 KB |
Output is correct |
52 |
Correct |
971 ms |
4756 KB |
Output is correct |
53 |
Correct |
1535 ms |
5704 KB |
Output is correct |
54 |
Correct |
1488 ms |
5704 KB |
Output is correct |
55 |
Correct |
1622 ms |
5740 KB |
Output is correct |
56 |
Correct |
1475 ms |
6372 KB |
Output is correct |
57 |
Correct |
1796 ms |
6456 KB |
Output is correct |
58 |
Correct |
2009 ms |
6364 KB |
Output is correct |
59 |
Correct |
2221 ms |
6456 KB |
Output is correct |
60 |
Correct |
2217 ms |
6560 KB |
Output is correct |
61 |
Correct |
2207 ms |
6580 KB |
Output is correct |
62 |
Correct |
1782 ms |
5968 KB |
Output is correct |
63 |
Correct |
1726 ms |
6156 KB |
Output is correct |
64 |
Correct |
1887 ms |
6188 KB |
Output is correct |
65 |
Correct |
1663 ms |
5804 KB |
Output is correct |
66 |
Correct |
1809 ms |
4844 KB |
Output is correct |
67 |
Correct |
2282 ms |
4852 KB |
Output is correct |
68 |
Correct |
1948 ms |
4848 KB |
Output is correct |
69 |
Correct |
1450 ms |
4824 KB |
Output is correct |
70 |
Correct |
2234 ms |
4852 KB |
Output is correct |
71 |
Correct |
2280 ms |
5008 KB |
Output is correct |
72 |
Correct |
2285 ms |
4748 KB |
Output is correct |
73 |
Correct |
1894 ms |
4804 KB |
Output is correct |
74 |
Correct |
1966 ms |
4888 KB |
Output is correct |
75 |
Correct |
1950 ms |
4832 KB |
Output is correct |
76 |
Correct |
1663 ms |
4808 KB |
Output is correct |
77 |
Correct |
1574 ms |
4720 KB |
Output is correct |
78 |
Correct |
1545 ms |
4836 KB |
Output is correct |
79 |
Correct |
1390 ms |
4756 KB |
Output is correct |
80 |
Correct |
1323 ms |
4784 KB |
Output is correct |
81 |
Correct |
1502 ms |
4716 KB |
Output is correct |
82 |
Correct |
1147 ms |
4788 KB |
Output is correct |
83 |
Correct |
1118 ms |
4788 KB |
Output is correct |
84 |
Correct |
1127 ms |
4756 KB |
Output is correct |
85 |
Correct |
2912 ms |
6444 KB |
Output is correct |
86 |
Correct |
301 ms |
4048 KB |
Output is correct |
87 |
Correct |
385 ms |
4052 KB |
Output is correct |
88 |
Correct |
2477 ms |
6368 KB |
Output is correct |
89 |
Correct |
2943 ms |
6528 KB |
Output is correct |
90 |
Correct |
2623 ms |
6452 KB |
Output is correct |
91 |
Correct |
2009 ms |
4868 KB |
Output is correct |
92 |
Correct |
1970 ms |
4724 KB |
Output is correct |
93 |
Correct |
2656 ms |
4716 KB |
Output is correct |
94 |
Correct |
2402 ms |
5704 KB |
Output is correct |
95 |
Correct |
2405 ms |
5700 KB |
Output is correct |
96 |
Correct |
2682 ms |
5804 KB |
Output is correct |
97 |
Correct |
1967 ms |
6380 KB |
Output is correct |
98 |
Correct |
1812 ms |
6452 KB |
Output is correct |
99 |
Correct |
2716 ms |
6356 KB |
Output is correct |
100 |
Correct |
2736 ms |
6448 KB |
Output is correct |
101 |
Correct |
2805 ms |
6512 KB |
Output is correct |
102 |
Correct |
2599 ms |
6492 KB |
Output is correct |
103 |
Correct |
2919 ms |
5976 KB |
Output is correct |
104 |
Correct |
2835 ms |
9164 KB |
Output is correct |
105 |
Correct |
1992 ms |
9408 KB |
Output is correct |
106 |
Correct |
1580 ms |
8880 KB |
Output is correct |
107 |
Correct |
2188 ms |
9428 KB |
Output is correct |
108 |
Correct |
2753 ms |
9828 KB |
Output is correct |
109 |
Correct |
2484 ms |
7780 KB |
Output is correct |