이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
using namespace std;
#define ll long long
const int mod = 1e9 + 7, N = 3e4 + 5, LOG = 20;
vector<int> adj[N];
int s[N], e[N], depth[N], up[N][LOG];
int timer = 0;
void dfs(int v, int p){
s[v] = ++timer;
for(auto x : adj[v]){
if(x == p) continue;
up[x][0] = v; depth[x] = depth[v] + 1;
for(int j = 1; j < LOG; j++){
up[x][j] = up[up[x][j - 1]][j - 1];
}
dfs(x, v);
}
e[v] = timer;
}
int lca(int u, int v){
if(depth[u] < depth[v]) swap(u, v);
int k = depth[u] - depth[v];
for(int j = LOG - 1; j >= 0; j--){
if(k & (1 << j)) u = up[u][j];
}
if(u == v) return v;
for(int j = LOG - 1; j >= 0; j--){
if(up[u][j] != up[v][j]){
u = up[u][j]; v = up[v][j];
}
}
return up[u][0];
}
int fenwick[N][LOG + 1][LOG + 1] = {};
int sum(int r, int i, int k) {
int res = 0;
while (r >= 0) {
res += fenwick[r][i][k];
r = (r & (r + 1)) - 1;
}
return res;
}
int get(int l, int r, int i, int k) {
return sum(r, i, k) - sum(l - 1, i, k);
}
void inc(int j, int delta, int i, int k) {
while (j < N) {
fenwick[j][i][k] += delta;
j |= j + 1;
}
}
int Get(int u, int v, int i, int k){
int x = lca(u, v);
return get(1LL, s[u], i, k) + get(1LL, s[v], i, k) - get(1LL, s[x], i, k) - get(1LL, s[up[x][0]], i, k);
}
void upd(int v, int x, int i, int k){
inc(s[v], x, i, k);
inc(e[v] + 1, -x, i, k);
}
vector<int> path(int u, int v){
int x = lca(u, v), a = u, b = v;
vector<int> p;
while(a != x){
p.push_back(a);
a = up[a][0];
}
p.push_back(x);
vector<int> q;
while(b != x){
q.push_back(b);
b = up[b][0];
}
reverse(q.begin(), q.end());
for(auto k : q) p.push_back(k);
return p;
}
void add(int u, int v){
vector<int> p = path(u, v);
int k = p.size();
for(int i = 0; i < k; i++){
upd(p[i], 1, i, k);
}
}
void del(int u, int v){
vector<int> p = path(u, v);
int k = p.size();
for(int i = 0; i < k; i++){
upd(p[i], -1, i, k);
}
}
ll calc(int i, int k, int t1, int t2){
t1--;
ll val1 = max(0, (t2 + k - i) / k);
ll val2 = max(0, (t1 + k - i) / k);
val1 -= val2;
return val1;
}
void query(int u, int v, int t1, int t2){
vector<int> p = path(u, v);
ll ans = 0;
// for(auto x : p){
// for(int i = 0; i <= LOG; i++){
// for(int k = 1; k <= LOG; k++){
// ans += calc(i, k, t1, t2) * f[x][i][k];
// }
// }
// }
for(int i = 0; i <= LOG; i++){
for(int k = 1; k <= LOG; k++){
ans += 1LL * calc(i, k, t1, t2) * Get(u, v, i, k);
}
}
cout << ans << '\n';
}
main(){
ios::sync_with_stdio(0);
cin.tie(0),cout.tie(0);
int tt = 1; //cin >> tt;
while(tt--){
int n;
cin >> n;
for(int i = 1; i <= n - 1; i++){
int x, y;
cin >> x >> y;
adj[x].push_back(y);
adj[y].push_back(x);
}
dfs(1, 0);
int k;
cin >> k;
for(int i = 0; i < k; i++){
int x, y;
cin >> x >> y;
add(x, y);
}
int q;
cin >> q;
while(q--){
int t;
cin >> t;
if(t == 1){
int x, y;
cin >> x >> y;
add(x, y);
}else if(t == 2){
int x, y;
cin >> x >> y;
del(x, y);
}else{
int x, y, t1, t2;
cin >> x >> y >> t1 >> t2;
query(x, y, t1, t2);
}
}
}
}
컴파일 시 표준 에러 (stderr) 메시지
traffickers.cpp:117:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
117 | main(){
| ^~~~
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