This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<bits/stdc++.h>
#define ll long long
#define pb push_back
#define pii pair<int,int>
#define vi vector<int>
#define fi first
#define se second
#define all(x) (x).begin(),(x).end()
using namespace std;
const int N = 3e4+5;
vi adj[N];
int n,k,q,tin[N],tout[N],timer,P[N][18],h[N];
void dfs(int v,int p) {
P[v][0] = p;
h[v] = h[p] + 1;
tin[v] = ++timer;
for (int h = 1; h < 18; h++)
P[v][h] = P[ P[v][h-1] ][h-1];
for (int i : adj[v]) {
if (i != p)
dfs(i,v);
}
tout[v] = ++timer;
}
bool isp(int a,int b) {
return tin[a] <= tin[b] && tout[a] >= tout[b];
}
int lca(int a,int b) {
if (isp(a,b)) return a;
if (isp(b,a)) return b;
for (int h = 17; h >= 0; h--)
if (!isp(P[a][h],b))
a = P[a][h];
return P[a][0];
}
multiset<pii> s[N];
map<pii,int> mp;
void add(int a,int b) {
int root = lca(a,b);
int k = h[a] - h[root] + h[b] - h[root] + 1;
int c = 0;
while (a != root) {
s[a].insert({k,c});
c++;
a = P[a][0];
}
// c++;
s[root].insert({k,c});
c = k-1;
while (b != root) {
s[b].insert({k,c});
c--;
b = P[b][0];
}
}
void erase(int a,int b) {
mp[{a,b}]--;
if (mp[{a,b}] == 0) mp.erase({a,b});
int root = lca(a,b);
int k = h[a] - h[root] + h[b] - h[root] + 1;
int c = 0;
while (a != root) {
s[a].erase(s[a].find(make_pair(k,c)));
c++;
a = P[a][0];
}
// c++;
s[root].erase({k,c});
c = k-1;
while (b != root) {
s[b].erase(s[b].find(make_pair(k,c)));
c--;
b = P[b][0];
}
}
main() {
ios::sync_with_stdio(0);
cin.tie(0);
tout[0] = 1000000000;
cin >> n;
for (int i = 1 ; i < n; i++) {
int a,b;
cin >> a >> b;
adj[a].pb(b);
adj[b].pb(a);
}
dfs(1,0);
cin >> k;
for (int i = 1; i <= k; i++) {
int a,b;
cin >> a >> b;
mp[{a,b}]++;
add(a,b);
}cin >> q;
for (int y = 1; y <= q; y++) {
int tp;
cin >> tp;
if (tp == 1) {
int a,b; cin >> a >> b;
mp[{a,b}]++;
add(a,b);
}else if (tp == 2) {
int a,b; cin >> a >> b;
erase(a,b);
}else {
vi path;
int u,v,t1,t2;
cin >> u >> v >> t1 >> t2;
int root = lca(u,v);
//cout <<root<<"E\n";
while (u != root) {
path.pb(u);
u = P[u][0];
}
while (v != root) {
path.pb(v);
v = P[v][0];
}
if (root) path.pb(root);
ll ans = 0;
for (int i : path) {
// cout << i <<"s ";
// cout << i <<" ";
for (auto j : s[i]) {
// cout << "Q "<<j.fi<<"S ";
//cout << j.fi <<' '<< j.se <<'s';
int k = j.fi;
int rem = j.se;
if (t1 + rem <= t2) {
ans += (t2 - (t1 + rem) + k )/k;
}
}
}
cout << ans <<'\n';
}
}
}
Compilation message (stderr)
traffickers.cpp:81:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
81 | main() {
| ^
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