#include "factories.h"
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define endl '\n'
#define FF first
#define SS second
#define all(a) a.begin(), a.end()
#define mod (ll)(1000000007)
#define MAX_N 500000
// #define MAX_Q 100000
// #define MAX_SUM_ST 1000000
// #define MAX_VALUE 1000000000
// static int N, Q;
// static int A[MAX_N], B[MAX_N], D[MAX_N];
// static int S[MAX_N];
// static int T[MAX_N];
// static int X[MAX_SUM_ST];
// static int Y[MAX_SUM_ST];
// static int Qx[MAX_N];
// static int Qy[MAX_N];
const ll inf=1e15, lg=19;
int n;
ll Dis[MAX_N];
int dpth[MAX_N];
vector<vector<int>>BB(MAX_N), AA(MAX_N);
int up[MAX_N][lg+1];
void pre(){
for(int i=0;i<MAX_N;i++){
Dis[i]=inf, dpth[i]=2*n;
}
}
void bfs(int ind){
queue<int>q;
q.push(ind);
up[ind][0]=ind;
Dis[ind]=dpth[ind]=0;
while(!q.empty()){
int u=q.front();
q.pop();
for(int j=1;j<=lg;j++){
up[u][j]=up[up[u][j-1]][j-1];
if(up[u][j]==0)
break;
}
for(int i=0;i<AA[u].size();i++){
int v=AA[u][i];
if(dpth[u]+1<dpth[v]){
dpth[v]=dpth[u]+1, Dis[v]=Dis[u]+BB[u][i];
up[v][0]=u;
q.push(v);
}
}
}
}
int lca(int u, int v){
// u
// v
if(dpth[u]>dpth[v])
swap(u, v);
for(int j=lg;j>=0;j--){
if(dpth[up[v][j]]>=dpth[u])
v=up[v][j];
}
if(u==v)
return u;
for(int j=lg;j>=0;j--){
if(up[u][j]!=up[v][j])
u=up[u][j], v=up[v][j];
}
return up[v][0];
}
inline ll get_dis(int u, int v){
return Dis[u]+Dis[v]-2*Dis[lca(u, v)];
}
void Init(int N, int A[], int B[], int D[]) {
n=N;
pre();
for(int i=0;i<n-1;i++){
int u=A[i], v=B[i], w=D[i];
AA[u].push_back(v);
AA[v].push_back(u);
BB[u].push_back(w);
BB[v].push_back(w);
}
bfs(0);
}
long long Query(int S, int X[], int T, int Y[]) {
if(S>10 && T>10){
vector<ll>D(n, inf);
vector<bool>In_y(n, 0), Vis(n, 0);
for(int i=0;i<T;i++){
In_y[Y[i]]=1;
}
priority_queue<array<ll, 2>>q;
for(int i=0;i<S;i++){
q.push({0, X[i]});
D[X[i]]=0;
}
while(!q.empty()){
int u=q.top()[1];
q.pop();
if(Vis[u])
continue;
Vis[u]=1;
if(In_y[u])
return D[u];
for(int i=0;i<AA[u].size();i++){
int v=AA[u][i], w=BB[u][i];
if(D[u]+w<D[v]){
D[v]=D[u]+w;
q.push({-D[v], v});
}
}
}
}
ll ans=inf;
for(int i=0;i<S;i++){
for(int j=0;j<T;j++){
ans=min(ans, get_dis(X[i], Y[j]));
}
}
return ans;
}
// int main() {
//
// int i, j, k;
// int STop, TTop;
//
// if (2 != scanf("%d%d", &N, &Q)) {
// fprintf(stderr, "error: cannot read N and Q.\n");
// exit(1);
// }
// if (!(2 <= N && N <= MAX_N)) {
// fprintf(stderr, "error: N is out of bounds.\n");
// exit(1);
// }
// if (!(1 <= Q && Q <= MAX_Q)) {
// fprintf(stderr, "error: Q is out of bounds.\n");
// exit(1);
// }
// for (i = 0; i < N - 1; ++i) {
// if (1 != scanf("%d", &A[i])) {
// fprintf(stderr, "error: cannot read A[%d].\n", i);
// exit(1);
// }
// if (!(0 <= A[i] && A[i] <= N - 1)) {
// fprintf(stderr, "error: A[%d] is out of bounds.\n", i);
// exit(1);
// }
// if (1 != scanf("%d", &B[i])) {
// fprintf(stderr, "error: cannot read B[%d].\n", i);
// exit(1);
// }
// if (!(0 <= B[i] && B[i] <= N - 1)) {
// fprintf(stderr, "error: B[%d] is out of bounds.\n", i);
// exit(1);
// }
// if (A[i] == B[i]) {
// fprintf(stderr, "error: B[%d] is equal to A[%d].\n", i, i);
// exit(1);
// }
// if (1 != scanf("%d", &D[i])) {
// fprintf(stderr, "error: cannot read D[%d].\n", i);
// exit(1);
// }
// if (!(1 <= D[i] && D[i] <= MAX_VALUE)) {
// fprintf(stderr, "error: D[%d] is out of bounds.\n", i);
// exit(1);
// }
// }
//
// STop = 0;
// TTop = 0;
//
// for (j = 0; j < Q; ++j) {
// if (2 != scanf("%d%d", &S[j], &T[j])) {
// fprintf(stderr, "error: cannot read L[%d] and R[%d].\n", j, j);
// exit(1);
// }
//
// if(STop + S[j] > MAX_SUM_ST) {
// fprintf(stderr, "error: S[0] + S[1] + ... + S[%d] is out of bounds.\n", j);
// exit(1);
// }
//
// if(TTop + T[j] > MAX_SUM_ST) {
// fprintf(stderr, "error: T[0] + T[1] + ... + T[%d] is out of bounds.\n", j);
// exit(1);
// }
//
// for (k = 0; k < S[j]; ++k, ++STop) {
// if (1 != scanf("%d", &X[STop])) {
// fprintf(stderr, "error: cannot read X[%d][%d].\n", j, k);
// exit(1);
// }
//
// if (!(0 <= X[STop] && X[STop] <= N - 1)) {
// fprintf(stderr, "error: cannot read X[%d][%d].\n", j, k);
// exit(1);
// }
// }
//
// for (k = 0; k < T[j]; ++k, ++TTop) {
// if (1 != scanf("%d", &Y[TTop])) {
// fprintf(stderr, "error: cannot read Y[%d][%d].\n", j, k);
// exit(1);
// }
//
// if (!(0 <= Y[TTop] && Y[TTop] <= N - 1)) {
// fprintf(stderr, "error: cannot read Y[%d][%d].\n", j, k);
// exit(1);
// }
// }
// }
//
// STop = 0;
// TTop = 0;
// Init(N, A, B, D);
//
// for (j = 0; j < Q; ++j) {
// for (k = 0; k < S[j]; k++) {
// Qx[k] = X[STop++];
// }
// for (k = 0; k < T[j]; k++) {
// Qy[k] = Y[TTop++];
// }
//
// printf("%lld\n", Query(S[j], Qx, T[j], Qy));
// }
//
//
// return 0;
// }
Compilation message
factories.cpp: In function 'void bfs(int)':
factories.cpp:49:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
49 | for(int i=0;i<AA[u].size();i++){
| ~^~~~~~~~~~~~~
factories.cpp: In function 'long long int Query(int, int*, int, int*)':
factories.cpp:113:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
113 | for(int i=0;i<AA[u].size();i++){
| ~^~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
25 ms |
30044 KB |
Output is correct |
| 2 |
Correct |
328 ms |
38588 KB |
Output is correct |
| 3 |
Correct |
319 ms |
38416 KB |
Output is correct |
| 4 |
Correct |
606 ms |
38616 KB |
Output is correct |
| 5 |
Correct |
311 ms |
38472 KB |
Output is correct |
| 6 |
Correct |
429 ms |
38668 KB |
Output is correct |
| 7 |
Correct |
333 ms |
38440 KB |
Output is correct |
| 8 |
Correct |
494 ms |
38476 KB |
Output is correct |
| 9 |
Correct |
325 ms |
38516 KB |
Output is correct |
| 10 |
Correct |
454 ms |
38664 KB |
Output is correct |
| 11 |
Correct |
328 ms |
38432 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
18 ms |
29792 KB |
Output is correct |
| 2 |
Correct |
1640 ms |
114156 KB |
Output is correct |
| 3 |
Correct |
3575 ms |
111532 KB |
Output is correct |
| 4 |
Correct |
1056 ms |
117024 KB |
Output is correct |
| 5 |
Correct |
3676 ms |
113132 KB |
Output is correct |
| 6 |
Correct |
2839 ms |
113204 KB |
Output is correct |
| 7 |
Execution timed out |
8106 ms |
54136 KB |
Time limit exceeded |
| 8 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
25 ms |
30044 KB |
Output is correct |
| 2 |
Correct |
328 ms |
38588 KB |
Output is correct |
| 3 |
Correct |
319 ms |
38416 KB |
Output is correct |
| 4 |
Correct |
606 ms |
38616 KB |
Output is correct |
| 5 |
Correct |
311 ms |
38472 KB |
Output is correct |
| 6 |
Correct |
429 ms |
38668 KB |
Output is correct |
| 7 |
Correct |
333 ms |
38440 KB |
Output is correct |
| 8 |
Correct |
494 ms |
38476 KB |
Output is correct |
| 9 |
Correct |
325 ms |
38516 KB |
Output is correct |
| 10 |
Correct |
454 ms |
38664 KB |
Output is correct |
| 11 |
Correct |
328 ms |
38432 KB |
Output is correct |
| 12 |
Correct |
18 ms |
29792 KB |
Output is correct |
| 13 |
Correct |
1640 ms |
114156 KB |
Output is correct |
| 14 |
Correct |
3575 ms |
111532 KB |
Output is correct |
| 15 |
Correct |
1056 ms |
117024 KB |
Output is correct |
| 16 |
Correct |
3676 ms |
113132 KB |
Output is correct |
| 17 |
Correct |
2839 ms |
113204 KB |
Output is correct |
| 18 |
Execution timed out |
8106 ms |
54136 KB |
Time limit exceeded |
| 19 |
Halted |
0 ms |
0 KB |
- |
