oj.uz

Submission #772144

# Submission time Handle Problem Language Result Execution time Memory
772144 2023-07-03T17:06:30 Z Essa2006 Factories (JOI14_factories) C++14
100 / 100
 5415 ms 139548 KB 
#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>45 && T>45){
        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++){
      |                         ~^~~~~~~~~~~~~
factories.cpp: At global scope:
factories.cpp:21:12: warning: 'Qy' defined but not used [-Wunused-variable]
   21 | static int Qy[MAX_N];
      |            ^~
factories.cpp:20:12: warning: 'Qx' defined but not used [-Wunused-variable]
   20 | static int Qx[MAX_N];
      |            ^~
factories.cpp:19:12: warning: 'Y' defined but not used [-Wunused-variable]
   19 | static int Y[MAX_SUM_ST];
      |            ^
factories.cpp:18:12: warning: 'X' defined but not used [-Wunused-variable]
   18 | static int X[MAX_SUM_ST];
      |            ^
factories.cpp:17:12: warning: 'T' defined but not used [-Wunused-variable]
   17 | static int T[MAX_N];
      |            ^
factories.cpp:16:12: warning: 'S' defined but not used [-Wunused-variable]
   16 | static int S[MAX_N];
      |            ^
factories.cpp:15:32: warning: 'D' defined but not used [-Wunused-variable]
   15 | static int A[MAX_N], B[MAX_N], D[MAX_N];
      |                                ^
factories.cpp:15:22: warning: 'B' defined but not used [-Wunused-variable]
   15 | static int A[MAX_N], B[MAX_N], D[MAX_N];
      |                      ^
factories.cpp:15:12: warning: 'A' defined but not used [-Wunused-variable]
   15 | static int A[MAX_N], B[MAX_N], D[MAX_N];
      |            ^
factories.cpp:14:15: warning: 'Q' defined but not used [-Wunused-variable]
   14 | static int N, Q;
      |               ^
factories.cpp:14:12: warning: 'N' defined but not used [-Wunused-variable]
   14 | static int N, Q;
      |            ^

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 85 ms 30048 KB Output is correct
2 Correct 485 ms 38484 KB Output is correct
3 Correct 332 ms 38444 KB Output is correct
4 Correct 995 ms 38596 KB Output is correct
5 Correct 436 ms 38460 KB Output is correct
6 Correct 597 ms 38980 KB Output is correct
7 Correct 340 ms 38432 KB Output is correct
8 Correct 756 ms 38456 KB Output is correct
9 Correct 430 ms 38488 KB Output is correct
10 Correct 617 ms 38764 KB Output is correct
11 Correct 311 ms 38424 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 29780 KB Output is correct
2 Correct 1674 ms 114132 KB Output is correct
3 Correct 3469 ms 111412 KB Output is correct
4 Correct 1025 ms 117060 KB Output is correct
5 Correct 3637 ms 113088 KB Output is correct
6 Correct 2556 ms 113344 KB Output is correct
7 Correct 5415 ms 54116 KB Output is correct
8 Correct 1816 ms 57664 KB Output is correct
9 Correct 4043 ms 56748 KB Output is correct
10 Correct 3279 ms 56204 KB Output is correct

Subtask #3
67.0 / 67.0

# Verdict Execution time Memory Grader output
1 Correct 85 ms 30048 KB Output is correct
2 Correct 485 ms 38484 KB Output is correct
3 Correct 332 ms 38444 KB Output is correct
4 Correct 995 ms 38596 KB Output is correct
5 Correct 436 ms 38460 KB Output is correct
6 Correct 597 ms 38980 KB Output is correct
7 Correct 340 ms 38432 KB Output is correct
8 Correct 756 ms 38456 KB Output is correct
9 Correct 430 ms 38488 KB Output is correct
10 Correct 617 ms 38764 KB Output is correct
11 Correct 311 ms 38424 KB Output is correct
12 Correct 19 ms 29780 KB Output is correct
13 Correct 1674 ms 114132 KB Output is correct
14 Correct 3469 ms 111412 KB Output is correct
15 Correct 1025 ms 117060 KB Output is correct
16 Correct 3637 ms 113088 KB Output is correct
17 Correct 2556 ms 113344 KB Output is correct
18 Correct 5415 ms 54116 KB Output is correct
19 Correct 1816 ms 57664 KB Output is correct
20 Correct 4043 ms 56748 KB Output is correct
21 Correct 3279 ms 56204 KB Output is correct
22 Correct 1321 ms 123448 KB Output is correct
23 Correct 2067 ms 127024 KB Output is correct
24 Correct 1461 ms 122328 KB Output is correct
25 Correct 1628 ms 123180 KB Output is correct
26 Correct 1604 ms 118760 KB Output is correct
27 Correct 2135 ms 123140 KB Output is correct
28 Correct 1589 ms 139548 KB Output is correct
29 Correct 3532 ms 118952 KB Output is correct
30 Correct 4381 ms 118800 KB Output is correct
31 Correct 5323 ms 118772 KB Output is correct
32 Correct 834 ms 57144 KB Output is correct
33 Correct 839 ms 59484 KB Output is correct
34 Correct 587 ms 54068 KB Output is correct
35 Correct 658 ms 54128 KB Output is correct
36 Correct 694 ms 53972 KB Output is correct
37 Correct 658 ms 53876 KB Output is correct