#include "highway.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
#define pb push_back
#define ff first
#define ss second
void find_pair(int n, vector<int> U, vector<int> V, int A, int B){
int m = (int) U.size();
vector<pii> g[n + 1];
for (int i = 0; i < m; i++){
U[i]++; V[i]++;
g[U[i]].pb({V[i], i});
g[V[i]].pb({U[i], i});
}
vector<int> w(m);
ll nl = ask(w);
auto check1 = [&](int x){
fill(w.begin(), w.end(), 0);
for (int i = x + 1; i < m; i++) w[i] = 1;
return (ask(w) == nl);
};
int l = 0, r = m - 1;
while (l + 1 < r){
int k = (l + r) / 2;
if (check1(k)){
r = k;
}
else {
l = k + 1;
}
}
if (check1(l)) r = l;
int x = r;
vector<bool> used(n + 1);
vector<int> ed = {x};
queue<int> q({V[x], U[x]});
used[V[x]] = used[U[x]] = 1;
while (!q.empty()){
int f = q.front(); q.pop();
for (auto [i, j]: g[f]){
if (used[i]) continue;
used[i] = 1;
q.push(i);
ed.pb(j);
}
}
auto cl = [&](){
fill(w.begin(), w.end(), 1);
for (int i: ed) w[i] = 0;
};
cl();
vector<pii> t[n + 1];
for (int i: ed){
t[U[i]].pb({V[i], i});
t[V[i]].pb({U[i], i});
}
vector<int> d(n + 1), p(n + 1), pe(n + 1);
function<void(int, int, vector<int>&, vector<int>&)> dfs = [&](int v, int pr, vector<int>& E, vector<int>& q){
q.pb(v);
p[v] = pr;
for (auto [i, j]: t[v]){
if (i == pr || j == x) continue;
d[i] = d[v] + 1;
pe[i] = j;
E.pb(j);
dfs(i, v, E, q);
}
};
vector<int> d1, d2, t1, t2;
dfs(U[x], 0, d1, t1);
dfs(V[x], 0, d2, t2);
int dist = (int) (ask(w) / A);
auto cmp = [&](int x, int y){
return (d[x] < d[y]);
};
ll AA = 1LL * dist * A;
auto solve = [&](int v, vector<int>& x2, vector<int> vv){
auto check = [&](int k){
fill(w.begin(), w.end(), 1);
for (int i: x2) w[i] = 0;
w[x] = 0;
for (int i = 1; i <= k; i++){
w[pe[vv[i]]] = 0;
}
return (ask(w) == AA);
};
int l = 0, r = (int) vv.size() - 1;
while (l + 1 < r){
int k = (l + r) / 2;
if (check(k)){
r = k;
}
else {
l = k + 1;
}
}
if (check(l)) r = l;
return (vv[r] - 1);
};
answer(solve(U[x], d2, t1), solve(V[x], d1, t2));
}
Compilation message
highway.cpp: In function 'void find_pair(int, std::vector<int>, std::vector<int>, int, int)':
highway.cpp:87:10: warning: variable 'cmp' set but not used [-Wunused-but-set-variable]
87 | auto cmp = [&](int x, int y){
| ^~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
344 KB |
Output is correct |
3 |
Correct |
0 ms |
344 KB |
Output is correct |
4 |
Correct |
0 ms |
344 KB |
Output is correct |
5 |
Correct |
0 ms |
344 KB |
Output is correct |
6 |
Correct |
1 ms |
344 KB |
Output is correct |
7 |
Correct |
0 ms |
344 KB |
Output is correct |
8 |
Correct |
0 ms |
344 KB |
Output is correct |
9 |
Correct |
0 ms |
344 KB |
Output is correct |
10 |
Correct |
1 ms |
344 KB |
Output is correct |
11 |
Correct |
0 ms |
344 KB |
Output is correct |
12 |
Correct |
0 ms |
344 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
596 KB |
Output is correct |
2 |
Correct |
9 ms |
2040 KB |
Output is correct |
3 |
Correct |
105 ms |
15820 KB |
Output is correct |
4 |
Correct |
104 ms |
16044 KB |
Output is correct |
5 |
Correct |
103 ms |
15988 KB |
Output is correct |
6 |
Correct |
115 ms |
15804 KB |
Output is correct |
7 |
Correct |
111 ms |
15800 KB |
Output is correct |
8 |
Correct |
97 ms |
15696 KB |
Output is correct |
9 |
Correct |
103 ms |
16100 KB |
Output is correct |
10 |
Correct |
99 ms |
15812 KB |
Output is correct |
11 |
Correct |
113 ms |
16944 KB |
Output is correct |
12 |
Correct |
124 ms |
18340 KB |
Output is correct |
13 |
Correct |
97 ms |
17168 KB |
Output is correct |
14 |
Correct |
97 ms |
17500 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
9 ms |
2904 KB |
Output is correct |
2 |
Correct |
18 ms |
4900 KB |
Output is correct |
3 |
Correct |
27 ms |
8100 KB |
Output is correct |
4 |
Correct |
79 ms |
20328 KB |
Output is correct |
5 |
Correct |
106 ms |
20796 KB |
Output is correct |
6 |
Correct |
86 ms |
23156 KB |
Output is correct |
7 |
Correct |
86 ms |
24104 KB |
Output is correct |
8 |
Correct |
93 ms |
21788 KB |
Output is correct |
9 |
Correct |
77 ms |
22424 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
600 KB |
Output is correct |
2 |
Correct |
11 ms |
2136 KB |
Output is correct |
3 |
Correct |
67 ms |
12396 KB |
Output is correct |
4 |
Correct |
103 ms |
15828 KB |
Output is correct |
5 |
Correct |
94 ms |
15800 KB |
Output is correct |
6 |
Correct |
97 ms |
15808 KB |
Output is correct |
7 |
Correct |
83 ms |
15812 KB |
Output is correct |
8 |
Correct |
102 ms |
15784 KB |
Output is correct |
9 |
Correct |
113 ms |
15748 KB |
Output is correct |
10 |
Correct |
104 ms |
15808 KB |
Output is correct |
11 |
Correct |
106 ms |
16568 KB |
Output is correct |
12 |
Correct |
106 ms |
17992 KB |
Output is correct |
13 |
Correct |
115 ms |
17408 KB |
Output is correct |
14 |
Correct |
105 ms |
17492 KB |
Output is correct |
15 |
Correct |
90 ms |
15808 KB |
Output is correct |
16 |
Correct |
90 ms |
16036 KB |
Output is correct |
17 |
Correct |
105 ms |
17200 KB |
Output is correct |
18 |
Correct |
106 ms |
17288 KB |
Output is correct |
19 |
Correct |
94 ms |
15812 KB |
Output is correct |
20 |
Correct |
105 ms |
18656 KB |
Output is correct |
21 |
Correct |
97 ms |
16476 KB |
Output is correct |
22 |
Correct |
79 ms |
16472 KB |
Output is correct |
23 |
Correct |
92 ms |
16420 KB |
Output is correct |
24 |
Correct |
91 ms |
16612 KB |
Output is correct |
25 |
Correct |
105 ms |
23488 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
14 ms |
2044 KB |
Output is correct |
2 |
Correct |
13 ms |
2128 KB |
Output is correct |
3 |
Correct |
118 ms |
16336 KB |
Output is correct |
4 |
Correct |
108 ms |
16484 KB |
Output is correct |
5 |
Correct |
161 ms |
17508 KB |
Output is correct |
6 |
Correct |
145 ms |
17312 KB |
Output is correct |
7 |
Correct |
161 ms |
17264 KB |
Output is correct |
8 |
Correct |
155 ms |
17248 KB |
Output is correct |
9 |
Correct |
101 ms |
9424 KB |
Output is correct |
10 |
Correct |
101 ms |
9264 KB |
Output is correct |
11 |
Correct |
105 ms |
11344 KB |
Output is correct |
12 |
Correct |
136 ms |
14896 KB |
Output is correct |
13 |
Correct |
142 ms |
15972 KB |
Output is correct |
14 |
Correct |
168 ms |
17432 KB |
Output is correct |
15 |
Correct |
154 ms |
17012 KB |
Output is correct |
16 |
Correct |
121 ms |
11092 KB |
Output is correct |
17 |
Correct |
117 ms |
16508 KB |
Output is correct |
18 |
Correct |
96 ms |
17288 KB |
Output is correct |
19 |
Correct |
93 ms |
16428 KB |
Output is correct |
20 |
Correct |
94 ms |
16428 KB |
Output is correct |
21 |
Correct |
136 ms |
18000 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
11 ms |
2048 KB |
Output is correct |
2 |
Correct |
13 ms |
2136 KB |
Output is correct |
3 |
Correct |
95 ms |
16156 KB |
Output is correct |
4 |
Correct |
121 ms |
16576 KB |
Output is correct |
5 |
Correct |
120 ms |
16664 KB |
Output is correct |
6 |
Correct |
152 ms |
17424 KB |
Output is correct |
7 |
Correct |
119 ms |
16124 KB |
Output is correct |
8 |
Correct |
121 ms |
16252 KB |
Output is correct |
9 |
Correct |
117 ms |
16476 KB |
Output is correct |
10 |
Correct |
165 ms |
17196 KB |
Output is correct |
11 |
Partially correct |
154 ms |
17232 KB |
Output is partially correct |
12 |
Partially correct |
147 ms |
17424 KB |
Output is partially correct |
13 |
Correct |
128 ms |
11316 KB |
Output is correct |
14 |
Correct |
125 ms |
9480 KB |
Output is correct |
15 |
Correct |
107 ms |
11444 KB |
Output is correct |
16 |
Correct |
97 ms |
9512 KB |
Output is correct |
17 |
Correct |
101 ms |
11312 KB |
Output is correct |
18 |
Correct |
102 ms |
9280 KB |
Output is correct |
19 |
Correct |
145 ms |
14968 KB |
Output is correct |
20 |
Correct |
148 ms |
15824 KB |
Output is correct |
21 |
Partially correct |
164 ms |
17240 KB |
Output is partially correct |
22 |
Partially correct |
151 ms |
17000 KB |
Output is partially correct |
23 |
Correct |
174 ms |
17012 KB |
Output is correct |
24 |
Correct |
156 ms |
17280 KB |
Output is correct |
25 |
Correct |
178 ms |
17300 KB |
Output is correct |
26 |
Correct |
145 ms |
17092 KB |
Output is correct |
27 |
Correct |
94 ms |
16316 KB |
Output is correct |
28 |
Correct |
93 ms |
16200 KB |
Output is correct |
29 |
Correct |
91 ms |
16572 KB |
Output is correct |
30 |
Correct |
106 ms |
16344 KB |
Output is correct |
31 |
Correct |
101 ms |
16416 KB |
Output is correct |
32 |
Correct |
99 ms |
16280 KB |
Output is correct |
33 |
Correct |
101 ms |
16508 KB |
Output is correct |
34 |
Correct |
96 ms |
16292 KB |
Output is correct |
35 |
Correct |
90 ms |
16392 KB |
Output is correct |
36 |
Correct |
113 ms |
16572 KB |
Output is correct |
37 |
Correct |
112 ms |
16560 KB |
Output is correct |
38 |
Correct |
99 ms |
16424 KB |
Output is correct |
39 |
Correct |
147 ms |
18520 KB |
Output is correct |
40 |
Correct |
148 ms |
18828 KB |
Output is correct |
41 |
Correct |
156 ms |
17792 KB |
Output is correct |
42 |
Partially correct |
146 ms |
17516 KB |
Output is partially correct |