oj.uz

Submission #403581

# Submission time Handle Problem Language Result Execution time Memory
403581 2021-05-13T09:45:06 Z Wasrek Swapping Cities (APIO20_swap) C++14
13 / 100
 148 ms 15152 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][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][i]=dis[1][i]=MAX;
  }
  if(!h.empty()) h.pop();
  dis[0][X]=0;
  //int u,w,la,ch
  int nw;
  h.push({X,0,-1,1});
  while(!h.empty()){
   now=h.top();
   h.pop();
   for(auto x: g[now.u]){
      if(x.u==now.la) continue;
      nw=max(x.w,now.w);
      if(nw<dis[0][x.u]){
        dis[1][x.u]=dis[0][x.u];
        dis[0][x.u]=nw;
        h.push({x.u,nw,now.u,now.ch});
      }else if(nw<dis[1][x.u]){
        dis[1][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][now.la]){
        dis[1][now.la]=nw;
        h.push({now.la,now.w,now.u,0});
      }
   } 
  }
  int a,b,c;
  a=max(dis[0][Y],dis[1][Y]);
  b=max(dis[0][Y],g[Y][2].w);
  c=max(dis[0][Y],g[X][2].w);
  return min(a,min(b,c));
}

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:111:23: warning: 'nw' may be used uninitialized in this function [-Wmaybe-uninitialized]
  111 |         dis[1][now.la]=nw;
      |         ~~~~~~~~~~~~~~^~~

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 2580 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 3 ms 2636 KB Output is correct
6 Correct 3 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 47 ms 6856 KB Output is correct
10 Correct 52 ms 7876 KB Output is correct
11 Correct 51 ms 7728 KB Output is correct
12 Correct 54 ms 8048 KB Output is correct
13 Correct 57 ms 8060 KB Output is correct
14 Correct 52 ms 7028 KB Output is correct
15 Correct 127 ms 9696 KB Output is correct
16 Correct 120 ms 9560 KB Output is correct
17 Correct 136 ms 9804 KB Output is correct
18 Correct 132 ms 9900 KB Output is correct
19 Correct 72 ms 6992 KB Output is correct
20 Correct 133 ms 14512 KB Output is correct
21 Correct 148 ms 14176 KB Output is correct
22 Correct 147 ms 14520 KB Output is correct
23 Correct 140 ms 14552 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 143 ms 11592 KB Output is correct
4 Correct 128 ms 14996 KB Output is correct
5 Correct 128 ms 15152 KB Output is correct
6 Correct 126 ms 14864 KB Output is correct
7 Correct 130 ms 15136 KB Output is correct
8 Correct 124 ms 14852 KB Output is correct
9 Correct 122 ms 14900 KB Output is correct
10 Correct 132 ms 14848 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 2580 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 3 ms 2636 KB Output is correct
6 Correct 3 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 3 ms 2636 KB Output is correct
11 Correct 4 ms 2636 KB Output is correct
12 Correct 3 ms 2636 KB Output is correct
13 Correct 3 ms 2636 KB Output is correct
14 Correct 3 ms 2636 KB Output is correct
15 Incorrect 4 ms 2636 KB Output isn't correct
16 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 3 ms 2636 KB Output is correct
3 Correct 2 ms 2636 KB Output is correct
4 Correct 2 ms 2580 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 2636 KB Output is correct
10 Correct 47 ms 6856 KB Output is correct
11 Correct 52 ms 7876 KB Output is correct
12 Correct 51 ms 7728 KB Output is correct
13 Correct 54 ms 8048 KB Output is correct
14 Correct 57 ms 8060 KB Output is correct
15 Correct 3 ms 2636 KB Output is correct
16 Correct 4 ms 2636 KB Output is correct
17 Correct 3 ms 2636 KB Output is correct
18 Correct 3 ms 2636 KB Output is correct
19 Correct 3 ms 2636 KB Output is correct
20 Incorrect 4 ms 2636 KB Output isn't correct
21 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 2580 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 3 ms 2636 KB Output is correct
6 Correct 3 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 47 ms 6856 KB Output is correct
10 Correct 52 ms 7876 KB Output is correct
11 Correct 51 ms 7728 KB Output is correct
12 Correct 54 ms 8048 KB Output is correct
13 Correct 57 ms 8060 KB Output is correct
14 Correct 52 ms 7028 KB Output is correct
15 Correct 127 ms 9696 KB Output is correct
16 Correct 120 ms 9560 KB Output is correct
17 Correct 136 ms 9804 KB Output is correct
18 Correct 132 ms 9900 KB Output is correct
19 Correct 143 ms 11592 KB Output is correct
20 Correct 128 ms 14996 KB Output is correct
21 Correct 128 ms 15152 KB Output is correct
22 Correct 126 ms 14864 KB Output is correct
23 Correct 130 ms 15136 KB Output is correct
24 Correct 124 ms 14852 KB Output is correct
25 Correct 122 ms 14900 KB Output is correct
26 Correct 132 ms 14848 KB Output is correct
27 Correct 3 ms 2636 KB Output is correct
28 Correct 4 ms 2636 KB Output is correct
29 Correct 3 ms 2636 KB Output is correct
30 Correct 3 ms 2636 KB Output is correct
31 Correct 3 ms 2636 KB Output is correct
32 Incorrect 4 ms 2636 KB Output isn't correct
33 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 3 ms 2636 KB Output is correct
3 Correct 2 ms 2636 KB Output is correct
4 Correct 2 ms 2580 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 2636 KB Output is correct
10 Correct 47 ms 6856 KB Output is correct
11 Correct 52 ms 7876 KB Output is correct
12 Correct 51 ms 7728 KB Output is correct
13 Correct 54 ms 8048 KB Output is correct
14 Correct 57 ms 8060 KB Output is correct
15 Correct 52 ms 7028 KB Output is correct
16 Correct 127 ms 9696 KB Output is correct
17 Correct 120 ms 9560 KB Output is correct
18 Correct 136 ms 9804 KB Output is correct
19 Correct 132 ms 9900 KB Output is correct
20 Correct 143 ms 11592 KB Output is correct
21 Correct 128 ms 14996 KB Output is correct
22 Correct 128 ms 15152 KB Output is correct
23 Correct 126 ms 14864 KB Output is correct
24 Correct 130 ms 15136 KB Output is correct
25 Correct 124 ms 14852 KB Output is correct
26 Correct 122 ms 14900 KB Output is correct
27 Correct 132 ms 14848 KB Output is correct
28 Correct 3 ms 2636 KB Output is correct
29 Correct 4 ms 2636 KB Output is correct
30 Correct 3 ms 2636 KB Output is correct
31 Correct 3 ms 2636 KB Output is correct
32 Correct 3 ms 2636 KB Output is correct
33 Incorrect 4 ms 2636 KB Output isn't correct
34 Halted 0 ms 0 KB -