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>
#pragma GCC optimize("O2")
#pragma GCC optimize("avx2")
using namespace std;
const int dydis = 2e5 + 10;
int n, r, q;
vector<int> dideli; // regionai
vector<int> regs[dydis];
int tevas[dydis];
vector<int> gr[dydis];
map<pair<int, int>, long long > rem;
int sm[dydis];
int val[dydis];
int kam[dydis];
int sq;
int dbInd = 0;
int kelint[dydis];
int enter[dydis], leave[dydis];
long long dideliuMem1[450][20001], dideliuMem2[450][20001];
void dfs1(int v, int came){
enter[v] = dbInd++;
for(auto x : gr[v]){
if(x == came) continue;
dfs1(x, v);
}
leave[v] = dbInd;
}
bool isAnc(int a, int b){
return enter[a] <= enter[b] && leave[b] <= leave[a];
}
int kek = 0;
int prm = 0;
void dfs(int v){
// cout << "v = " << v << endl;
sm[v] = val[v];
for(auto x : gr[v]){
if(x == tevas[v]) continue;
kek += val[v];
dfs(x);
kek -= val[v];
sm[v] += sm[x];
}
if(!val[v]){
// cout << "rem[" << prm+1 << "][" << v+1 << "(" << kam[v]+1 << ")] += " << kek << "\n";
// cout << "rem[" << v+1 << "(" << kam[v]+1 << ")][" << prm+1 << "] += " << sm[v] << "\n"
dideliuMem1[prm][kam[v]] += kek;
dideliuMem2[prm][kam[v]] += sm[v];
}
}
int dbIndd = 0;
void calc(int ind){
kelint[ind] = dbIndd++;
// cout << "nuo " << ind+1 << endl;
for(int i = 0; i < n; i++) sm[i] = val[i] = 0;
for(auto x : regs[ind]){
val[x] = 1;
}
kek = 0;
prm = dbIndd-1;
dfs(0);
}
long long f(int a, int b){
if((int)regs[a].size() >= sq){
int sk = kelint[a];
return dideliuMem1[sk][b];
}
if((int)regs[b].size() >= sq){
int sk = kelint[b];
return dideliuMem2[sk][a];
}
if(rem.count({a, b})) {
return rem[{a, b}] ;
}
long long ret = 0;
for(auto x : regs[a]){
for(auto y : regs[b]){
ret += isAnc(x, y);
}
}
return rem[{a, b}] = ret;
}
int main(){
cin.tie(NULL);
ios_base::sync_with_stdio(false);
cin >> n >> r >> q;
for(int i = 0; i < n; i++){
int par = -1, reg;
if(i == 0) cin >> reg;
else cin >> par >> reg;
par--; reg--;
regs[reg].push_back(i);
if(par != -2){
gr[i].push_back(par);
gr[par].push_back(i);
}
tevas[i] = par;
kam[i] = reg;
}
dfs1(0, -1);
sq = sqrt(n);
for(int i = 0; i < r; i++){
if((int)regs[i].size() >= sq){
calc(i);
dideli.push_back(i);
}
}
while(q--){
int a, b; cin >> a >> b; a--; b--;
cout << f(a, b) << endl;
}
return 0;
}
컴파일 시 표준 에러 (stderr) 메시지
regions.cpp:3:28: warning: bad option '-favx2' to pragma 'optimize' [-Wpragmas]
3 | #pragma GCC optimize("avx2")
| ^
regions.cpp:21:26: warning: bad option '-favx2' to attribute 'optimize' [-Wattributes]
21 | void dfs1(int v, int came){
| ^
regions.cpp:29:24: warning: bad option '-favx2' to attribute 'optimize' [-Wattributes]
29 | bool isAnc(int a, int b){
| ^
regions.cpp:34:15: warning: bad option '-favx2' to attribute 'optimize' [-Wattributes]
34 | void dfs(int v){
| ^
regions.cpp:53:18: warning: bad option '-favx2' to attribute 'optimize' [-Wattributes]
53 | void calc(int ind){
| ^
regions.cpp:64:25: warning: bad option '-favx2' to attribute 'optimize' [-Wattributes]
64 | long long f(int a, int b){
| ^
regions.cpp:84:10: warning: bad option '-favx2' to attribute 'optimize' [-Wattributes]
84 | int main(){
| ^
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