oj.uz

Submission #403637

# Submission time Handle Problem Language Result Execution time Memory
403637 2021-05-13T10:33:53 Z Wasrek Swapping Cities (APIO20_swap) C++14
13 / 100
 135 ms 11856 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(nw<dis[0][0][now.la]){
        dis[1][0][now.la]=dis[0][0][now.la];
        dis[0][0][now.la]=nw;
        h.push({now.la,nw,now.u,0});
      }else if(nw<dis[1][0][now.la]){
        dis[1][0][now.la]=nw;
        h.push({now.la,nw,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;
}

Compilation message

swap.cpp: In function 'int dijkstra(int, int)':
swap.cpp:118:26: warning: 'nw' may be used uninitialized in this function [-Wmaybe-uninitialized]
  118 |         dis[1][0][now.la]=nw;
      |         ~~~~~~~~~~~~~~~~~^~~

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 3 ms 2688 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 6948 KB Output is correct
10 Correct 52 ms 7876 KB Output is correct
11 Correct 52 ms 7736 KB Output is correct
12 Correct 55 ms 8064 KB Output is correct
13 Correct 54 ms 8040 KB Output is correct
14 Correct 50 ms 7028 KB Output is correct
15 Correct 135 ms 9692 KB Output is correct
16 Correct 114 ms 9580 KB Output is correct
17 Correct 121 ms 9800 KB Output is correct
18 Correct 131 ms 9976 KB Output is correct
19 Correct 61 ms 6980 KB Output is correct
20 Correct 116 ms 10832 KB Output is correct
21 Correct 116 ms 11008 KB Output is correct
22 Correct 124 ms 11412 KB Output is correct
23 Correct 120 ms 11268 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 116 ms 11728 KB Output is correct
5 Correct 114 ms 11856 KB Output is correct
6 Correct 108 ms 11592 KB Output is correct
7 Correct 116 ms 11844 KB Output is correct
8 Correct 114 ms 11596 KB Output is correct
9 Correct 117 ms 11704 KB Output is correct
10 Correct 113 ms 11600 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 3 ms 2688 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 4 ms 2764 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 3 ms 2688 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 6948 KB Output is correct
11 Correct 52 ms 7876 KB Output is correct
12 Correct 52 ms 7736 KB Output is correct
13 Correct 55 ms 8064 KB Output is correct
14 Correct 54 ms 8040 KB Output is correct
15 Incorrect 4 ms 2764 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 3 ms 2688 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 6948 KB Output is correct
10 Correct 52 ms 7876 KB Output is correct
11 Correct 52 ms 7736 KB Output is correct
12 Correct 55 ms 8064 KB Output is correct
13 Correct 54 ms 8040 KB Output is correct
14 Correct 50 ms 7028 KB Output is correct
15 Correct 135 ms 9692 KB Output is correct
16 Correct 114 ms 9580 KB Output is correct
17 Correct 121 ms 9800 KB Output is correct
18 Correct 131 ms 9976 KB Output is correct
19 Correct 112 ms 11600 KB Output is correct
20 Correct 116 ms 11728 KB Output is correct
21 Correct 114 ms 11856 KB Output is correct
22 Correct 108 ms 11592 KB Output is correct
23 Correct 116 ms 11844 KB Output is correct
24 Correct 114 ms 11596 KB Output is correct
25 Correct 117 ms 11704 KB Output is correct
26 Correct 113 ms 11600 KB Output is correct
27 Incorrect 4 ms 2764 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 3 ms 2688 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 6948 KB Output is correct
11 Correct 52 ms 7876 KB Output is correct
12 Correct 52 ms 7736 KB Output is correct
13 Correct 55 ms 8064 KB Output is correct
14 Correct 54 ms 8040 KB Output is correct
15 Correct 50 ms 7028 KB Output is correct
16 Correct 135 ms 9692 KB Output is correct
17 Correct 114 ms 9580 KB Output is correct
18 Correct 121 ms 9800 KB Output is correct
19 Correct 131 ms 9976 KB Output is correct
20 Correct 112 ms 11600 KB Output is correct
21 Correct 116 ms 11728 KB Output is correct
22 Correct 114 ms 11856 KB Output is correct
23 Correct 108 ms 11592 KB Output is correct
24 Correct 116 ms 11844 KB Output is correct
25 Correct 114 ms 11596 KB Output is correct
26 Correct 117 ms 11704 KB Output is correct
27 Correct 113 ms 11600 KB Output is correct
28 Incorrect 4 ms 2764 KB Output isn't correct
29 Halted 0 ms 0 KB -