oj.uz

Submission #403619

# Submission time Handle Problem Language Result Execution time Memory
403619 2021-05-13T10:13:23 Z Wasrek Swapping Cities (APIO20_swap) C++14
13 / 100
 260 ms 11956 KB 
#include<bits/stdc++.h>
#include "swap.h"
// #include"grader.cpp"
#include <vector>
#define SIZE 100010
#define MAX 2000000000
using namespace std;
struct A{
  int u,w;
  bool operator<(const A & o) const{
    return w<o.w;
  }
};
int n,sub2=1,sub1=1,cycle=1,ma=0,dis[3][3][SIZE];
A m1={MAX,MAX},m2={MAX,MAX},m3={MAX,MAX};
vector<A> g[SIZE];
struct DIJK{
  int u,w,la,ch;
  // nx node from x,ny node from y,mi min node path that between
  bool operator <(const DIJK & o) const{
    if(w!=o.w) return w>o.w;
    //w==o.w
    return ch<o.ch;
  }
} now;
priority_queue< DIJK > h;
void init(int N, int M, std::vector<int> U, std::vector<int> V, std::vector<int> W) {
    n=N;
    for(int i=0;i<M;i++){
      g[U[i]].push_back({V[i],W[i]});
      g[V[i]].push_back({U[i],W[i]});
      if(W[i]>ma) ma=W[i];
      if(U[i]!=0) sub2=0;
      if(!sub2) continue;
      if(W[i]<m1.w){
        m3=m2,m2=m1,m1={V[i],W[i]};
      }else if(W[i]<m2.w){
        m3=m2,m2={V[i],W[i]};
      }else if(W[i]<m3.w){
        m3={V[i],W[i]};
      }
    }
    if(sub1){
      for(int i=0;i<N;i++){
        if(g[i].size()>2) sub1=0;
        if(g[i].size()<2) cycle=0;
      }
    }
    if(!sub1 && !sub2){
      for(int i=0;i<n;i++){
        sort(g[i].begin(),g[i].end());
      }
    }
    // printf("%d %d\n%d %d\n%d %d\n",m1.u,m1.w,m2.u,m2.w,m3.u,m3.w);
    return ;
}

int subtask2(int X,int Y){
  if(n<=3) return -1;
  if(X!=0 && Y!=0){
    if(X!=m1.u && Y!=m1.u){
      return max(g[X][0].w,max(g[Y][0].w,m1.w));
    }else if(X!=m2.u && Y!=m2.u){
      return max(g[X][0].w,max(g[Y][0].w,m2.w));
    }else if(X!=m3.u && Y!=m3.u){
      return max(g[X][0].w,max(g[Y][0].w,m3.w));
    }
  }else{
    if(Y==0) swap(X,Y);
    //X==0
    if(Y==m1.u || Y==m2.u || Y==m3.u){
      return m3.w;
    }else{
      return max(g[Y][0].w,m2.w);
    }
  }
  return -1;
}

int subtask1(int X,int Y){
  if(cycle) return ma;
  else return -1;
}

int dijkstra(int X,int Y){
  for(int i=0;i<n;i++){
    dis[0][0][i]=dis[0][1][i]=dis[1][0][i]=dis[1][1][i]=MAX;
  }
  if(!h.empty()) h.pop();
  dis[0][1][X]=0;
  //int u,w,la,ch
  int nw;
  h.push({X,0,-1,1});
  while(!h.empty()){
   now=h.top();
   h.pop();
   if(now.u==Y) continue;
   if(now.u==X && now.ch==0) continue;
   for(auto x: g[now.u]){
      if(x.u==now.la) continue;
      nw=max(x.w,now.w);
      if(nw<dis[0][1][x.u] || now.ch==0){
        dis[1][1][x.u]=dis[0][1][x.u];
        dis[0][1][x.u]=nw;
        h.push({x.u,nw,now.u,now.ch});
      }else if(nw<dis[1][now.ch][x.u]){
        dis[1][now.ch][x.u]=nw;
        h.push({x.u,nw,now.u,now.ch});
      }
   }
   if(now.ch && now.la!=Y && now.la!=X){
      if(now.w<dis[1][0][now.la]){
        dis[1][0][now.la]=now.w;
        h.push({now.la,now.w,now.u,0});
      }
   } 
  }
  int a,b,c;
  a=b=c=MAX;
  if(min(dis[1][0][Y],dis[1][1][Y])!=MAX) a=max(min(dis[0][0][Y],dis[0][1][Y]),min(dis[1][0][Y],dis[1][1][Y]));
  if(g[Y].size()>=3)b=max(min(dis[0][0][Y],dis[0][1][Y]),g[Y][2].w);
  if(g[X].size()>=3)c=max(min(dis[0][0][Y],dis[0][1][Y]),g[X][2].w);
  a=min(a,min(b,c));
  if(a==MAX) return -1;
  return a;
}

int getMinimumFuelCapacity(int X, int Y) {
  //min path ที่มี node อยู่ระหว่าง path กับถนนที่เชื่อมกันโหนดตรงกลาง
  //min path 2 path
  //min path + ลูกของ u หรือ v ที่ไม่อยู่ใน path 2 โนหด (u ทั้งคู่ / v ทั้งคู่)
  if(sub2) return subtask2(X,Y);
  else if(sub1) return subtask1(X,Y);
  else return dijkstra(X,Y);
  return 0;
}

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 2 ms 2636 KB Output is correct
3 Correct 2 ms 2636 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 2 ms 2636 KB Output is correct
7 Correct 2 ms 2636 KB Output is correct
8 Correct 2 ms 2636 KB Output is correct
9 Correct 43 ms 6896 KB Output is correct
10 Correct 52 ms 7876 KB Output is correct
11 Correct 52 ms 7740 KB Output is correct
12 Correct 56 ms 8056 KB Output is correct
13 Correct 54 ms 8044 KB Output is correct
14 Correct 47 ms 6980 KB Output is correct
15 Correct 116 ms 9692 KB Output is correct
16 Correct 113 ms 9584 KB Output is correct
17 Correct 119 ms 9896 KB Output is correct
18 Correct 117 ms 9820 KB Output is correct
19 Correct 62 ms 6912 KB Output is correct
20 Correct 115 ms 10888 KB Output is correct
21 Correct 117 ms 11008 KB Output is correct
22 Correct 123 ms 11236 KB Output is correct
23 Correct 121 ms 11224 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 2 ms 2636 KB Output is correct
3 Correct 112 ms 11600 KB Output is correct
4 Correct 111 ms 11716 KB Output is correct
5 Correct 115 ms 11852 KB Output is correct
6 Correct 108 ms 11592 KB Output is correct
7 Correct 119 ms 11956 KB Output is correct
8 Correct 111 ms 11572 KB Output is correct
9 Correct 111 ms 11704 KB Output is correct
10 Correct 110 ms 11592 KB Output is correct

Subtask #3
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 2 ms 2636 KB Output is correct
3 Correct 2 ms 2636 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 2 ms 2636 KB Output is correct
7 Correct 2 ms 2636 KB Output is correct
8 Correct 2 ms 2636 KB Output is correct
9 Correct 2 ms 2636 KB Output is correct
10 Incorrect 260 ms 3068 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 2 ms 2636 KB Output is correct
3 Correct 2 ms 2636 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 2 ms 2636 KB Output is correct
7 Correct 2 ms 2636 KB Output is correct
8 Correct 2 ms 2636 KB Output is correct
9 Correct 2 ms 2636 KB Output is correct
10 Correct 43 ms 6896 KB Output is correct
11 Correct 52 ms 7876 KB Output is correct
12 Correct 52 ms 7740 KB Output is correct
13 Correct 56 ms 8056 KB Output is correct
14 Correct 54 ms 8044 KB Output is correct
15 Incorrect 260 ms 3068 KB Output isn't correct
16 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 2 ms 2636 KB Output is correct
3 Correct 2 ms 2636 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 2 ms 2636 KB Output is correct
7 Correct 2 ms 2636 KB Output is correct
8 Correct 2 ms 2636 KB Output is correct
9 Correct 43 ms 6896 KB Output is correct
10 Correct 52 ms 7876 KB Output is correct
11 Correct 52 ms 7740 KB Output is correct
12 Correct 56 ms 8056 KB Output is correct
13 Correct 54 ms 8044 KB Output is correct
14 Correct 47 ms 6980 KB Output is correct
15 Correct 116 ms 9692 KB Output is correct
16 Correct 113 ms 9584 KB Output is correct
17 Correct 119 ms 9896 KB Output is correct
18 Correct 117 ms 9820 KB Output is correct
19 Correct 112 ms 11600 KB Output is correct
20 Correct 111 ms 11716 KB Output is correct
21 Correct 115 ms 11852 KB Output is correct
22 Correct 108 ms 11592 KB Output is correct
23 Correct 119 ms 11956 KB Output is correct
24 Correct 111 ms 11572 KB Output is correct
25 Correct 111 ms 11704 KB Output is correct
26 Correct 110 ms 11592 KB Output is correct
27 Incorrect 260 ms 3068 KB Output isn't correct
28 Halted 0 ms 0 KB -

Subtask #6
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 2 ms 2636 KB Output is correct
3 Correct 2 ms 2636 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 2 ms 2636 KB Output is correct
7 Correct 2 ms 2636 KB Output is correct
8 Correct 2 ms 2636 KB Output is correct
9 Correct 2 ms 2636 KB Output is correct
10 Correct 43 ms 6896 KB Output is correct
11 Correct 52 ms 7876 KB Output is correct
12 Correct 52 ms 7740 KB Output is correct
13 Correct 56 ms 8056 KB Output is correct
14 Correct 54 ms 8044 KB Output is correct
15 Correct 47 ms 6980 KB Output is correct
16 Correct 116 ms 9692 KB Output is correct
17 Correct 113 ms 9584 KB Output is correct
18 Correct 119 ms 9896 KB Output is correct
19 Correct 117 ms 9820 KB Output is correct
20 Correct 112 ms 11600 KB Output is correct
21 Correct 111 ms 11716 KB Output is correct
22 Correct 115 ms 11852 KB Output is correct
23 Correct 108 ms 11592 KB Output is correct
24 Correct 119 ms 11956 KB Output is correct
25 Correct 111 ms 11572 KB Output is correct
26 Correct 111 ms 11704 KB Output is correct
27 Correct 110 ms 11592 KB Output is correct
28 Incorrect 260 ms 3068 KB Output isn't correct
29 Halted 0 ms 0 KB -