oj.uz

Submission #29917

# Submission time Handle Problem Language Result Execution time Memory
29917 2017-07-21T10:39:07 Z PrOAhMeT 007 (CEOI14_007) C++14
0 / 100
 363 ms 18168 KB 
#include <bits/stdc++.h>
#define mp make_pair
#define pb push_back
#define pii pair<int,int>
#define LL long long
#define st first
#define nd second
#define endl '\n'
using namespace std;

const int MAXN=200005;
int n,m,dis[2][MAXN],s,d,a,b,t,tt;
vector<int> v[MAXN];

void bfs(int start,int wait,int u) {

	memset(dis[u],-1,sizeof dis[u]);
	queue<int> q;
	dis[u][start]=0;
	int x,y;
	q.push(start);
	while(!q.empty()) {
		x=q.front();
		q.pop();
		for(int i=0;i<v[x].size();++i) {
			y=v[x][i];
			if(dis[u][y]==-1) {
				dis[u][y]=dis[u][x]+1;
				q.push(y);
			}
		}
	}

}

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",&t,&tt);
		v[t].pb(tt);
		v[tt].pb(t);
	}
	int l=0,r=n,ans=-1,md;
	bfs(d,0,1);
	bfs(s,0,0);
	if(dis[0][a]>dis[1][a]||dis[0][b]>dis[1][b])
		cout<<-1<<endl;
	else {
		cout<<min(dis[1][a]-dis[0][a],dis[1][b]-dis[0][b])<<endl;
	}

}

Compilation message

007.cpp: In function 'void bfs(int, int, int)':
007.cpp:25:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<v[x].size();++i) {
                ^
007.cpp: In function 'int main()':
007.cpp:45:6: warning: unused variable 'l' [-Wunused-variable]
  int l=0,r=n,ans=-1,md;
      ^
007.cpp:45:10: warning: unused variable 'r' [-Wunused-variable]
  int l=0,r=n,ans=-1,md;
          ^
007.cpp:45:14: warning: unused variable 'ans' [-Wunused-variable]
  int l=0,r=n,ans=-1,md;
              ^
007.cpp:45:21: warning: unused variable 'md' [-Wunused-variable]
  int l=0,r=n,ans=-1,md;
                     ^
007.cpp:38:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&n,&m);
                      ^
007.cpp:39:34: 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:41:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d",&t,&tt);
                        ^

Subtask #1
0.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 8268 KB Output is correct
2 Correct 0 ms 8268 KB Output is correct
3 Correct 3 ms 8268 KB Output is correct
4 Incorrect 0 ms 8268 KB Output isn't correct
5 Incorrect 0 ms 8268 KB Output isn't correct
6 Correct 0 ms 8268 KB Output is correct
7 Correct 0 ms 8268 KB Output is correct
8 Incorrect 3 ms 8268 KB Output isn't correct
9 Correct 0 ms 8268 KB Output is correct
10 Correct 0 ms 8268 KB Output is correct
11 Correct 3 ms 8268 KB Output is correct
12 Incorrect 0 ms 8268 KB Output isn't correct
13 Correct 0 ms 8268 KB Output is correct
14 Incorrect 0 ms 8268 KB Output isn't correct
15 Correct 3 ms 8268 KB Output is correct
16 Incorrect 0 ms 8268 KB Output isn't correct
17 Incorrect 0 ms 8268 KB Output isn't correct
18 Incorrect 0 ms 8268 KB Output isn't correct
19 Correct 0 ms 8268 KB Output is correct
20 Correct 3 ms 8268 KB Output is correct
21 Correct 0 ms 8268 KB Output is correct
22 Correct 0 ms 8268 KB Output is correct
23 Correct 3 ms 8268 KB Output is correct
24 Incorrect 0 ms 8268 KB Output isn't correct

Subtask #2
0.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 9588 KB Output is correct
2 Incorrect 46 ms 10116 KB Output isn't correct
3 Correct 29 ms 9588 KB Output is correct
4 Incorrect 29 ms 10248 KB Output isn't correct
5 Correct 33 ms 9456 KB Output is correct
6 Correct 26 ms 9720 KB Output is correct
7 Correct 23 ms 9852 KB Output is correct
8 Correct 43 ms 9852 KB Output is correct
9 Incorrect 59 ms 10248 KB Output isn't correct
10 Correct 186 ms 14472 KB Output is correct
11 Incorrect 79 ms 11172 KB Output isn't correct
12 Correct 109 ms 11832 KB Output is correct
13 Incorrect 93 ms 11304 KB Output isn't correct
14 Correct 63 ms 10908 KB Output is correct
15 Correct 96 ms 11964 KB Output is correct
16 Correct 103 ms 12096 KB Output is correct
17 Correct 83 ms 11700 KB Output is correct
18 Incorrect 83 ms 11700 KB Output isn't correct
19 Correct 146 ms 12888 KB Output is correct
20 Incorrect 266 ms 15660 KB Output isn't correct
21 Incorrect 133 ms 13284 KB Output isn't correct
22 Correct 133 ms 12624 KB Output is correct
23 Correct 133 ms 13284 KB Output is correct
24 Correct 126 ms 13152 KB Output is correct
25 Incorrect 119 ms 12888 KB Output isn't correct
26 Correct 139 ms 12624 KB Output is correct
27 Correct 146 ms 13284 KB Output is correct
28 Correct 186 ms 13284 KB Output is correct
29 Correct 216 ms 14076 KB Output is correct
30 Incorrect 253 ms 16188 KB Output isn't correct
31 Incorrect 173 ms 14076 KB Output isn't correct
32 Correct 133 ms 13284 KB Output is correct
33 Correct 143 ms 13416 KB Output is correct
34 Incorrect 186 ms 13680 KB Output isn't correct
35 Incorrect 153 ms 13416 KB Output isn't correct
36 Incorrect 139 ms 13680 KB Output isn't correct
37 Correct 146 ms 14340 KB Output is correct
38 Correct 159 ms 14208 KB Output is correct
39 Correct 183 ms 14208 KB Output is correct
40 Incorrect 293 ms 15924 KB Output isn't correct
41 Correct 363 ms 18168 KB Output is correct