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Submission #43412

# Submission time Handle Problem Language Result Execution time Memory
43412 2018-03-15T20:48:39 Z Hassoony 007 (CEOI14_007) C++14
0 / 100
 376 ms 17308 KB 
#include<bits/stdc++.h>

using namespace std;
typedef long long ll;
const int MX=2e5+9;
int n,m,a,b,s,d,dis[MX],dis1[MX],x,y,vis[MX];
vector<int>v[MX];
void bfs(int x,int y){
    for(int i=1;i<=n;i++)dis[i]=MX,vis[i]=0;
    dis[x]=0;
    queue<int>q;
    q.push(x);
    while(!q.empty()){
        int node=q.front();q.pop();
        if(vis[node])continue;
        vis[node]=1;
        for(auto pp:v[node]){
            if(pp==y)continue;
            if(dis[pp]==MX){
                dis[pp]=dis[node]+1;
                q.push(pp);
            }
        }
    }
}
int main(){
    scanf("%d%d",&n,&m);
    scanf("%d%d%d%d",&s,&d,&a,&b);
    for(int i=0;i<m;i++){
        scanf("%d%d",&x,&y);
        v[x].push_back(y);
        v[y].push_back(x);
    }
    bfs(s,d);
    for(int i=1;i<=n;i++)dis1[i]=dis[i];
    bfs(d,s);
    if(dis[a]<dis1[a]||dis[b]<dis1[b]){
        puts("-1");
        return 0;
    }
    bfs(s,0);
    for(int i=1;i<=n;i++)dis1[i]=dis[i];
    bfs(d,0);
    if(dis[a]<dis[b]){
        cout<<dis[a]-dis1[a]<<endl;
    }
    else cout<<dis[b]-dis1[b]<<endl;
}

Compilation message

007.cpp: In function 'int main()':
007.cpp:27:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&m);
                        ^
007.cpp:28:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d%d%d",&s,&d,&a,&b);
                                  ^
007.cpp:30:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d",&x,&y);
                            ^

Subtask #1
0.0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 4988 KB Output isn't correct
2 Correct 5 ms 5088 KB Output is correct
3 Correct 5 ms 5088 KB Output is correct
4 Incorrect 5 ms 5144 KB Output isn't correct
5 Incorrect 5 ms 5144 KB Output isn't correct
6 Correct 5 ms 5216 KB Output is correct
7 Correct 5 ms 5220 KB Output is correct
8 Incorrect 5 ms 5220 KB Output isn't correct
9 Correct 5 ms 5220 KB Output is correct
10 Incorrect 5 ms 5220 KB Output isn't correct
11 Correct 5 ms 5220 KB Output is correct
12 Incorrect 5 ms 5220 KB Output isn't correct
13 Correct 5 ms 5284 KB Output is correct
14 Incorrect 7 ms 5284 KB Output isn't correct
15 Correct 5 ms 5284 KB Output is correct
16 Incorrect 5 ms 5284 KB Output isn't correct
17 Incorrect 5 ms 5356 KB Output isn't correct
18 Incorrect 5 ms 5356 KB Output isn't correct
19 Correct 5 ms 5356 KB Output is correct
20 Correct 6 ms 5356 KB Output is correct
21 Correct 5 ms 5356 KB Output is correct
22 Correct 5 ms 5356 KB Output is correct
23 Correct 5 ms 5356 KB Output is correct
24 Incorrect 6 ms 5356 KB Output isn't correct

Subtask #2
0.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 29 ms 6996 KB Output is correct
2 Incorrect 39 ms 7788 KB Output isn't correct
3 Correct 31 ms 7788 KB Output is correct
4 Incorrect 39 ms 7892 KB Output isn't correct
5 Correct 31 ms 7892 KB Output is correct
6 Correct 29 ms 7892 KB Output is correct
7 Correct 35 ms 7892 KB Output is correct
8 Correct 34 ms 7892 KB Output is correct
9 Incorrect 53 ms 7892 KB Output isn't correct
10 Correct 189 ms 12196 KB Output is correct
11 Incorrect 68 ms 12196 KB Output isn't correct
12 Correct 87 ms 12196 KB Output is correct
13 Incorrect 78 ms 12196 KB Output isn't correct
14 Correct 56 ms 12196 KB Output is correct
15 Correct 85 ms 12196 KB Output is correct
16 Correct 86 ms 12196 KB Output is correct
17 Correct 78 ms 12196 KB Output is correct
18 Incorrect 77 ms 12196 KB Output isn't correct
19 Correct 134 ms 12196 KB Output is correct
20 Incorrect 261 ms 13932 KB Output isn't correct
21 Incorrect 124 ms 13932 KB Output isn't correct
22 Correct 128 ms 13932 KB Output is correct
23 Correct 118 ms 13932 KB Output is correct
24 Correct 112 ms 13932 KB Output is correct
25 Incorrect 114 ms 13932 KB Output isn't correct
26 Correct 107 ms 13932 KB Output is correct
27 Correct 124 ms 13932 KB Output is correct
28 Correct 171 ms 13932 KB Output is correct
29 Correct 209 ms 13932 KB Output is correct
30 Incorrect 279 ms 14740 KB Output isn't correct
31 Incorrect 147 ms 14740 KB Output isn't correct
32 Correct 157 ms 14740 KB Output is correct
33 Correct 133 ms 14740 KB Output is correct
34 Incorrect 166 ms 14740 KB Output isn't correct
35 Incorrect 129 ms 14740 KB Output isn't correct
36 Incorrect 135 ms 14740 KB Output isn't correct
37 Correct 169 ms 14740 KB Output is correct
38 Correct 181 ms 14740 KB Output is correct
39 Correct 246 ms 14740 KB Output is correct
40 Incorrect 249 ms 14940 KB Output isn't correct
41 Correct 376 ms 17308 KB Output is correct