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Submission #115989

# Submission time Handle Problem Language Result Execution time Memory
115989 2019-06-10T06:43:15 Z ckodser Senior Postmen (BOI14_postmen) C++14
100 / 100
 427 ms 47928 KB 
#include<bits/stdc++.h>

#define ll int
#define pb push_back
#define mp make_pair
#define ld long double
#define F first
#define S second
#define pii pair<ll,ll> 

using namespace :: std;

const ll mod=1e9+7;
const ll maxn=5e5+500;
const ll inf=1e9+900;

vector<ll> ger[maxn];
ll nex[2*maxn];
ll yal[2*maxn];
ll head[maxn];
ll cnt=0;

ll s[maxn];
ll t[maxn];
bool vis[maxn];
stack<ll> ans;
bool inAns[maxn];


void dfs(ll a){
    while(head[a]!=-1){
	ll e=yal[head[a]];
	head[a]=nex[head[a]];
	if(!vis[e]){
	    vis[e]=1;
	    dfs(s[e]^t[e]^a);
	}
    }
    if(inAns[a]){
	while(ans.top()!=a){
	    printf("%d ",ans.top());
	    inAns[ans.top()]=0;
	    ans.pop();
	}
	printf("%d\n",a);
    }else{
        ans.push(a);
	inAns[a]=1;
    }
}
int main(){
    ll n,m;
    scanf("%d%d",&n,&m);
    memset(head,-1,sizeof head);
    for(ll i=0;i<m;i++){
	scanf("%d%d",&s[i],&t[i]);
	nex[cnt]=head[s[i]];
	head[s[i]]=cnt;
	yal[cnt]=i;
	cnt++;

	nex[cnt]=head[t[i]];
	head[t[i]]=cnt;
	yal[cnt]=i;
	cnt++;
    }
    dfs(1);
}

Compilation message

postmen.cpp: In function 'int main()':
postmen.cpp:53:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&m);
     ~~~~~^~~~~~~~~~~~~~
postmen.cpp:56:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&s[i],&t[i]);
  ~~~~~^~~~~~~~~~~~~~~~~~~~

Subtask #1
38.0 / 38.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 14080 KB Output is correct
2 Correct 15 ms 14080 KB Output is correct
3 Correct 12 ms 14080 KB Output is correct
4 Correct 19 ms 14208 KB Output is correct
5 Correct 15 ms 14080 KB Output is correct
6 Correct 17 ms 14336 KB Output is correct
7 Correct 18 ms 14976 KB Output is correct
8 Correct 13 ms 14208 KB Output is correct
9 Correct 52 ms 20068 KB Output is correct
10 Correct 20 ms 14208 KB Output is correct
11 Correct 13 ms 14208 KB Output is correct
12 Correct 55 ms 20088 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 14080 KB Output is correct
2 Correct 12 ms 14080 KB Output is correct
3 Correct 14 ms 14080 KB Output is correct
4 Correct 16 ms 14208 KB Output is correct
5 Correct 15 ms 14080 KB Output is correct
6 Correct 17 ms 14336 KB Output is correct
7 Correct 18 ms 14976 KB Output is correct
8 Correct 15 ms 14208 KB Output is correct
9 Correct 62 ms 19960 KB Output is correct
10 Correct 14 ms 14208 KB Output is correct
11 Correct 13 ms 14208 KB Output is correct
12 Correct 57 ms 20044 KB Output is correct
13 Correct 62 ms 20704 KB Output is correct
14 Correct 67 ms 18960 KB Output is correct
15 Correct 61 ms 20216 KB Output is correct
16 Correct 66 ms 20728 KB Output is correct
17 Correct 74 ms 17400 KB Output is correct
18 Correct 76 ms 19680 KB Output is correct

Subtask #3
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 14080 KB Output is correct
2 Correct 12 ms 14132 KB Output is correct
3 Correct 13 ms 14080 KB Output is correct
4 Correct 14 ms 14336 KB Output is correct
5 Correct 12 ms 14080 KB Output is correct
6 Correct 17 ms 14336 KB Output is correct
7 Correct 23 ms 14976 KB Output is correct
8 Correct 14 ms 14208 KB Output is correct
9 Correct 52 ms 20064 KB Output is correct
10 Correct 14 ms 14208 KB Output is correct
11 Correct 17 ms 14208 KB Output is correct
12 Correct 60 ms 20088 KB Output is correct
13 Correct 64 ms 20728 KB Output is correct
14 Correct 65 ms 18912 KB Output is correct
15 Correct 66 ms 20096 KB Output is correct
16 Correct 67 ms 20704 KB Output is correct
17 Correct 68 ms 17400 KB Output is correct
18 Correct 72 ms 19576 KB Output is correct
19 Correct 390 ms 47928 KB Output is correct
20 Correct 382 ms 38812 KB Output is correct
21 Correct 392 ms 44864 KB Output is correct
22 Correct 348 ms 47840 KB Output is correct
23 Correct 237 ms 43868 KB Output is correct
24 Correct 425 ms 31224 KB Output is correct
25 Correct 427 ms 42212 KB Output is correct