oj.uz

Submission #403631

# Submission time Handle Problem Language Result Execution time Memory
403631 2021-05-13T10:26:59 Z Wasrek Swapping Cities (APIO20_swap) C++14
13 / 100
 119 ms 11852 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.la!=-1) continue;
  //  printf("%d %d %d %d\n",now.u,now.w,now.la,now.ch);
   for(auto x: g[now.u]){
      if(x.u==now.la) continue;
      nw=max(x.w,now.w);
      if(nw<dis[0][now.ch][x.u]){
        dis[1][now.ch][x.u]=dis[0][now.ch][x.u];
        dis[0][now.ch][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;
  // printf("%d %d %d %d\n",dis[0][0][Y],dis[0][1][Y],dis[1][0][Y],dis[1][1][Y]);
  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 3 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 3 ms 2636 KB Output is correct
7 Correct 3 ms 2636 KB Output is correct
8 Correct 2 ms 2636 KB Output is correct
9 Correct 42 ms 6828 KB Output is correct
10 Correct 50 ms 7876 KB Output is correct
11 Correct 49 ms 7724 KB Output is correct
12 Correct 57 ms 8180 KB Output is correct
13 Correct 55 ms 8044 KB Output is correct
14 Correct 47 ms 6980 KB Output is correct
15 Correct 117 ms 9712 KB Output is correct
16 Correct 109 ms 9564 KB Output is correct
17 Correct 115 ms 9900 KB Output is correct
18 Correct 114 ms 9824 KB Output is correct
19 Correct 60 ms 6904 KB Output is correct
20 Correct 117 ms 10820 KB Output is correct
21 Correct 118 ms 11004 KB Output is correct
22 Correct 118 ms 11308 KB Output is correct
23 Correct 119 ms 11224 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2636 KB Output is correct
2 Correct 2 ms 2636 KB Output is correct
3 Correct 112 ms 11588 KB Output is correct
4 Correct 113 ms 11656 KB Output is correct
5 Correct 115 ms 11852 KB Output is correct
6 Correct 113 ms 11552 KB Output is correct
7 Correct 114 ms 11840 KB Output is correct
8 Correct 111 ms 11584 KB Output is correct
9 Correct 112 ms 11652 KB Output is correct
10 Correct 110 ms 11548 KB Output is correct

Subtask #3
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 3 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 3 ms 2636 KB Output is correct
7 Correct 3 ms 2636 KB Output is correct
8 Correct 2 ms 2636 KB Output is correct
9 Correct 2 ms 2664 KB Output is correct
10 Correct 4 ms 2636 KB Output is correct
11 Incorrect 4 ms 2636 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2664 KB Output is correct
2 Correct 3 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 3 ms 2636 KB Output is correct
8 Correct 3 ms 2636 KB Output is correct
9 Correct 2 ms 2636 KB Output is correct
10 Correct 42 ms 6828 KB Output is correct
11 Correct 50 ms 7876 KB Output is correct
12 Correct 49 ms 7724 KB Output is correct
13 Correct 57 ms 8180 KB Output is correct
14 Correct 55 ms 8044 KB Output is correct
15 Correct 4 ms 2636 KB Output is correct
16 Incorrect 4 ms 2636 KB Output isn't correct
17 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 3 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 3 ms 2636 KB Output is correct
7 Correct 3 ms 2636 KB Output is correct
8 Correct 2 ms 2636 KB Output is correct
9 Correct 42 ms 6828 KB Output is correct
10 Correct 50 ms 7876 KB Output is correct
11 Correct 49 ms 7724 KB Output is correct
12 Correct 57 ms 8180 KB Output is correct
13 Correct 55 ms 8044 KB Output is correct
14 Correct 47 ms 6980 KB Output is correct
15 Correct 117 ms 9712 KB Output is correct
16 Correct 109 ms 9564 KB Output is correct
17 Correct 115 ms 9900 KB Output is correct
18 Correct 114 ms 9824 KB Output is correct
19 Correct 112 ms 11588 KB Output is correct
20 Correct 113 ms 11656 KB Output is correct
21 Correct 115 ms 11852 KB Output is correct
22 Correct 113 ms 11552 KB Output is correct
23 Correct 114 ms 11840 KB Output is correct
24 Correct 111 ms 11584 KB Output is correct
25 Correct 112 ms 11652 KB Output is correct
26 Correct 110 ms 11548 KB Output is correct
27 Correct 4 ms 2636 KB Output is correct
28 Incorrect 4 ms 2636 KB Output isn't correct
29 Halted 0 ms 0 KB -

Subtask #6
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2664 KB Output is correct
2 Correct 3 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 3 ms 2636 KB Output is correct
8 Correct 3 ms 2636 KB Output is correct
9 Correct 2 ms 2636 KB Output is correct
10 Correct 42 ms 6828 KB Output is correct
11 Correct 50 ms 7876 KB Output is correct
12 Correct 49 ms 7724 KB Output is correct
13 Correct 57 ms 8180 KB Output is correct
14 Correct 55 ms 8044 KB Output is correct
15 Correct 47 ms 6980 KB Output is correct
16 Correct 117 ms 9712 KB Output is correct
17 Correct 109 ms 9564 KB Output is correct
18 Correct 115 ms 9900 KB Output is correct
19 Correct 114 ms 9824 KB Output is correct
20 Correct 112 ms 11588 KB Output is correct
21 Correct 113 ms 11656 KB Output is correct
22 Correct 115 ms 11852 KB Output is correct
23 Correct 113 ms 11552 KB Output is correct
24 Correct 114 ms 11840 KB Output is correct
25 Correct 111 ms 11584 KB Output is correct
26 Correct 112 ms 11652 KB Output is correct
27 Correct 110 ms 11548 KB Output is correct
28 Correct 4 ms 2636 KB Output is correct
29 Incorrect 4 ms 2636 KB Output isn't correct
30 Halted 0 ms 0 KB -