oj.uz

Submission #712932

# Submission time Handle Problem Language Result Execution time Memory
712932 2023-03-20T13:36:56 Z yuseok0803 007 (CEOI14_007) C++14
20 / 100
 1000 ms 524288 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(p(pii, int)) qu;
	qu.push({{x,x}, 0});
	while(!qu.empty()){
		p(pii, int) now = qu.front();
		qu.pop();
		
		if(now.second > dista[now.first.first] && dista[now.first.first] != -1) continue;
		
		dista[now.first.first]=now.second;
		int sz = vec[now.first.first].size();
		fi(0,sz){
			int next = vec[now.first.first][i];
			if(next == now.first.second || (dista[next]!=-1 && dista[next] < now.second+1)) continue;
			qu.push({{next, now.first.first}, now.second+1});
		}
	}
	return;
}

void spreadb(int x){
	q(p(pii, int)) qu;
	qu.push({{x,x}, 0});
	while(!qu.empty()){
		p(pii, int) now = qu.front();
		qu.pop();
		
		if(now.second > distb[now.first.first] && distb[now.first.first] != -1) continue;
		
		distb[now.first.first]=now.second;
		int sz = vec[now.first.first].size();
		fi(0,sz){
			int next = vec[now.first.first][i];
			if(next == now.first.second && (distb[next]!=-1 && distb[next] < now.second+1)) continue;
			qu.push({{next, now.first.first}, now.second+1});
		}
	}
	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:108:35: warning: self-comparison always evaluates to true [-Wtautological-compare]
  108 |  if(dista[s]==distb[s] && distb[d]==distb[d]){
      |                           ~~~~~~~~^~~~~~~~~~
007.cpp:89:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   89 |  scanf("%d%d%d%d%d%d",&n,&m,&s,&d,&a,&b);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
007.cpp:94:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   94 |   scanf("%d%d",&s,&e);
      |   ~~~~~^~~~~~~~~~~~~~

Subtask #1
20.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 296 KB Output is correct
5 Correct 1 ms 292 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 216 KB Output is correct
15 Correct 1 ms 224 KB Output is correct
16 Correct 338 ms 78704 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 304 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Execution timed out 1109 ms 337840 KB Time limit exceeded

Subtask #2
0.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 3132 KB Output is correct
2 Correct 24 ms 4704 KB Output is correct
3 Correct 19 ms 3384 KB Output is correct
4 Correct 24 ms 4852 KB Output is correct
5 Correct 20 ms 2940 KB Output is correct
6 Correct 19 ms 3264 KB Output is correct
7 Correct 20 ms 3696 KB Output is correct
8 Correct 20 ms 3744 KB Output is correct
9 Execution timed out 1106 ms 340992 KB Time limit exceeded
10 Execution timed out 1002 ms 524288 KB Time limit exceeded
11 Correct 46 ms 6328 KB Output is correct
12 Correct 64 ms 7752 KB Output is correct
13 Correct 51 ms 6684 KB Output is correct
14 Correct 39 ms 5856 KB Output is correct
15 Correct 55 ms 8040 KB Output is correct
16 Correct 64 ms 7952 KB Output is correct
17 Correct 48 ms 7092 KB Output is correct
18 Correct 51 ms 7220 KB Output is correct
19 Execution timed out 1105 ms 350924 KB Time limit exceeded
20 Execution timed out 1105 ms 416748 KB Time limit exceeded
21 Correct 78 ms 11528 KB Output is correct
22 Correct 70 ms 9532 KB Output is correct
23 Correct 88 ms 10196 KB Output is correct
24 Correct 78 ms 11076 KB Output is correct
25 Correct 80 ms 10128 KB Output is correct
26 Correct 66 ms 9104 KB Output is correct
27 Correct 80 ms 10284 KB Output is correct
28 Correct 84 ms 10492 KB Output is correct
29 Execution timed out 1111 ms 372916 KB Time limit exceeded
30 Execution timed out 1103 ms 407560 KB Time limit exceeded
31 Correct 106 ms 13228 KB Output is correct
32 Correct 93 ms 10792 KB Output is correct
33 Correct 96 ms 10496 KB Output is correct
34 Correct 102 ms 11692 KB Output is correct
35 Correct 91 ms 11976 KB Output is correct
36 Correct 98 ms 12460 KB Output is correct
37 Correct 119 ms 12364 KB Output is correct
38 Correct 99 ms 12216 KB Output is correct
39 Correct 113 ms 12244 KB Output is correct
40 Execution timed out 1098 ms 328848 KB Time limit exceeded
41 Execution timed out 1096 ms 365264 KB Time limit exceeded