oj.uz

Submission #712933

# Submission time Handle Problem Language Result Execution time Memory
712933 2023-03-20T13:42:15 Z yuseok0803 007 (CEOI14_007) C++14
100 / 100
 243 ms 16236 KB 
#include <stdio.h>
#include <vector>
#include <queue>
#include <set>
#include <map>
#include <algorithm>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <stack>
#include <ctype.h>
#define p(x,y) pair<x, y>
#define pii pair<int, int>
#define v(x) vector<x>
#define q(x) queue<x>
#define pq(x) priority_queue<x>
#define uppq(x, comp) priority_queue<x, vector<x>, comp>
#define st(x) set<x>  
#define m(x, y) map<x, y>
#define fi(s,e) for(int i=s;i<e;i++)
#define fj(s,e) for(int j=s;j<e;j++)
#define fk(s,e) for(int k=s;k<e;k++)
typedef long long int ll;
typedef unsigned long long int ull;
typedef __int128 ulll;
using namespace std;

int n,m;
int s,d,a,b;
v(int) pushvec;
v(v(int)) vec;
int dista[200010], distb[200010];
int dpdiv[200010];

void spreada(int x){
	q(int) qu;
	qu.push(x);
	dista[x]=0;
	
	while(!qu.empty()){
		int now = qu.front();
		qu.pop();
		
		int sz = vec[now].size();
		fi(0,sz){
			int next = vec[now][i];
			if(dista[next]==-1){
				dista[next]=dista[now]+1;
				qu.push(next);
			}
		}
	}
	return;
}

void spreadb(int x){
	q(int) qu;
	qu.push(x);
	distb[x]=0;
	
	while(!qu.empty()){
		int now = qu.front();
		qu.pop();
		
		int sz = vec[now].size();
		fi(0,sz){
			int next = vec[now][i];
			if(distb[next]==-1){
				distb[next]=distb[now]+1;
				qu.push(next);
			}
		}
	}
	return;
}

int find(int now){
	if(dpdiv[now]) return dpdiv[now];
	
	int sz = vec[now].size();
	int ans = dista[now];
	fi(0,sz){
		int next = vec[now][i];
		if(dista[next]==dista[now]-1 && dista[next]==distb[next]){
			ans = min(ans, find(next));
		}
	}
	return dpdiv[now]=ans;
}

int main(void){
	scanf("%d%d%d%d%d%d",&n,&m,&s,&d,&a,&b);
	
	fi(0,n+1) vec.push_back(pushvec);
	fi(0,m){
		int s,e;
		scanf("%d%d",&s,&e);
		vec[s].push_back(e);
		vec[e].push_back(s);
	}
	
	fi(1,n+1){
		dista[i]=-1;
		distb[i]=-1;
	}
	
	spreada(a);
	spreadb(b);
	
	int ans = min(dista[d]-dista[s], distb[d]-distb[s]);
	if(dista[s]==distb[s] && distb[d]==distb[d]){
		int divds, divdd;
		divds = find(s);
		divdd = find(d);
		if(divds > divdd) ans--;
	}
	
	printf("%d\n", max(ans, -1));
	return 0;
}

Compilation message

007.cpp: In function 'int main()':
007.cpp:111:35: warning: self-comparison always evaluates to true [-Wtautological-compare]
  111 |  if(dista[s]==distb[s] && distb[d]==distb[d]){
      |                           ~~~~~~~~^~~~~~~~~~
007.cpp:92:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   92 |  scanf("%d%d%d%d%d%d",&n,&m,&s,&d,&a,&b);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
007.cpp:97:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   97 |   scanf("%d%d",&s,&e);
      |   ~~~~~^~~~~~~~~~~~~~

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 276 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct

Subtask #2
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 2924 KB Output is correct
2 Correct 24 ms 4424 KB Output is correct
3 Correct 23 ms 3144 KB Output is correct
4 Correct 28 ms 4552 KB Output is correct
5 Correct 19 ms 2652 KB Output is correct
6 Correct 17 ms 3016 KB Output is correct
7 Correct 21 ms 3400 KB Output is correct
8 Correct 22 ms 3436 KB Output is correct
9 Correct 32 ms 3984 KB Output is correct
10 Correct 130 ms 13812 KB Output is correct
11 Correct 45 ms 6352 KB Output is correct
12 Correct 62 ms 7736 KB Output is correct
13 Correct 52 ms 6668 KB Output is correct
14 Correct 38 ms 5716 KB Output is correct
15 Correct 60 ms 7988 KB Output is correct
16 Correct 62 ms 7908 KB Output is correct
17 Correct 48 ms 7152 KB Output is correct
18 Correct 51 ms 7244 KB Output is correct
19 Correct 101 ms 8908 KB Output is correct
20 Correct 161 ms 11740 KB Output is correct
21 Correct 83 ms 11620 KB Output is correct
22 Correct 80 ms 9480 KB Output is correct
23 Correct 87 ms 10216 KB Output is correct
24 Correct 86 ms 10988 KB Output is correct
25 Correct 88 ms 10164 KB Output is correct
26 Correct 67 ms 9116 KB Output is correct
27 Correct 84 ms 10320 KB Output is correct
28 Correct 88 ms 10424 KB Output is correct
29 Correct 133 ms 11180 KB Output is correct
30 Correct 169 ms 12696 KB Output is correct
31 Correct 90 ms 13240 KB Output is correct
32 Correct 97 ms 10756 KB Output is correct
33 Correct 93 ms 10568 KB Output is correct
34 Correct 103 ms 11616 KB Output is correct
35 Correct 91 ms 11948 KB Output is correct
36 Correct 96 ms 12440 KB Output is correct
37 Correct 114 ms 12416 KB Output is correct
38 Correct 118 ms 12140 KB Output is correct
39 Correct 120 ms 12272 KB Output is correct
40 Correct 182 ms 14252 KB Output is correct
41 Correct 243 ms 16236 KB Output is correct