답안 #391816

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
391816	2021-04-20T03:18:34 Z	i_am_noob	007 (CEOI14_007)	C++17	100 / 100	324 ms	33604 KB

#include<bits/stdc++.h>
using namespace std;

#define ll long long
#define int ll
#define rep(n) rep1(i,n)
#define rep1(i,n) rep2(i,0,n)
#define rep2(i,a,b) for(int i=a; i<(b); ++i)
#define rep3(i,a,b) for(int i=a; i>=(b); --i)
#define pb push_back
#define pii pair<int,int>
#define inf 0x3f3f3f3f
#define all(a) a.begin(),a.end()
#define sz(a) ((int)a.size())
#define pow2(x) (1ll<<(x))

#ifdef i_am_noob
#define bug(...) cerr << "#" << __LINE__ << " " << #__VA_ARGS__ << "- ", _do(__VA_ARGS__)
template<typename T> void _do(T x){cerr << x << endl;}
template<typename T, typename ...S> void _do(T x, S ...y){cerr << x << ", ";_do(y...);}
#else
#define bug(...) 49
#endif

const int maxn=200005;

int n,m,a,b,c,d,dis1[maxn],dis2[maxn],dis3[maxn],dis4[maxn],maxx=-1,maxx2=-1,ans;
vector<int> adj[maxn];
queue<int> q;
bool vis[maxn];

signed main(){
    ios_base::sync_with_stdio(0),cin.tie(0);
    cin >> n >> m >> a >> b >> c >> d;
    a--,b--,c--,d--;
    rep(m){
        int u,v;
        cin >> u >> v;
        u--,v--;
        adj[u].pb(v),adj[v].pb(u);
    }
    memset(vis,0,sizeof vis);
    q.push(a);
    vis[a]=1;
    dis1[a]=0;
    while(!q.empty()){
        int u=q.front();
        q.pop();
        for(auto v: adj[u]){
            if(vis[v]) continue;
            q.push(v);
            vis[v]=1;
            dis1[v]=dis1[u]+1;
        }
    }

    memset(vis,0,sizeof vis);
    q.push(b);
    vis[b]=1;
    dis2[b]=0;
    while(!q.empty()){
        int u=q.front();
        q.pop();
        for(auto v: adj[u]){
            if(vis[v]) continue;
            q.push(v);
            vis[v]=1;
            dis2[v]=dis2[u]+1;
        }
    }

    memset(vis,0,sizeof vis);
    q.push(c);
    vis[c]=1;
    dis3[c]=0;
    while(!q.empty()){
        int u=q.front();
        q.pop();
        for(auto v: adj[u]){
            if(vis[v]) continue;
            q.push(v);
            vis[v]=1;
            dis3[v]=dis3[u]+1;
        }
    }

    memset(vis,0,sizeof vis);
    q.push(d);
    vis[d]=1;
    dis4[d]=0;
    while(!q.empty()){
        int u=q.front();
        q.pop();
        for(auto v: adj[u]){
            if(vis[v]) continue;
            q.push(v);
            vis[v]=1;
            dis4[v]=dis4[u]+1;
        }
    }
    bug(dis1[c],dis1[d],dis2[c],dis2[d]);
    if(dis2[c]==dis2[d]){
        rep(n) if(dis3[i]==dis4[i]&&dis3[i]+dis2[i]==dis2[c]) maxx=max(maxx,dis2[i]);
        bug(maxx);
    }

    if(dis1[c]==dis1[d]){
        rep(n) if(dis3[i]==dis4[i]&&dis3[i]+dis1[i]==dis1[c]) maxx2=max(maxx2,dis1[i]);
        bug(maxx2);
    }

    int x=dis2[c],y=dis2[d];

    while(min(dis1[c],dis1[d])<min(x,y)){
        if(x==y){
            if(maxx){
                x--,y--,maxx--;
            }
            else if(dis1[c]>=dis1[d]) x--;
            else y--;
        }
        else x--,y--;
        ans++;
    }

    if(x<dis1[c]||y<dis1[d]){
        cout << ans-1 << "\n";
        return 0;
    }

    if(dis1[c]==dis1[d]){
        if(x!=y) cout << ans << "\n";
        else{
            if(maxx>maxx2) cout << ans-1 << "\n";
            else cout << ans << "\n";
        }
        return 0;
    }

    cout << ans << "\n";
}

Compilation message

007.cpp: In function 'int main()':
007.cpp:22:18: warning: statement has no effect [-Wunused-value]
   22 | #define bug(...) 49
      |                  ^~
007.cpp:101:5: note: in expansion of macro 'bug'
  101 |     bug(dis1[c],dis1[d],dis2[c],dis2[d]);
      |     ^~~
007.cpp:22:18: warning: statement has no effect [-Wunused-value]
   22 | #define bug(...) 49
      |                  ^~
007.cpp:104:9: note: in expansion of macro 'bug'
  104 |         bug(maxx);
      |         ^~~
007.cpp:22:18: warning: statement has no effect [-Wunused-value]
   22 | #define bug(...) 49
      |                  ^~
007.cpp:109:9: note: in expansion of macro 'bug'
  109 |         bug(maxx2);
      |         ^~~

Subtask #1
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	5196 KB	Output is correct
2	Correct	4 ms	5196 KB	Output is correct
3	Correct	4 ms	5196 KB	Output is correct
4	Correct	4 ms	5148 KB	Output is correct
5	Correct	4 ms	5160 KB	Output is correct
6	Correct	3 ms	5196 KB	Output is correct
7	Correct	3 ms	5164 KB	Output is correct
8	Correct	4 ms	5196 KB	Output is correct
9	Correct	4 ms	5196 KB	Output is correct
10	Correct	4 ms	5156 KB	Output is correct
11	Correct	3 ms	5168 KB	Output is correct
12	Correct	4 ms	5164 KB	Output is correct
13	Correct	4 ms	5196 KB	Output is correct
14	Correct	3 ms	5196 KB	Output is correct
15	Correct	4 ms	5160 KB	Output is correct
16	Correct	3 ms	5196 KB	Output is correct
17	Correct	5 ms	5196 KB	Output is correct
18	Correct	4 ms	5196 KB	Output is correct
19	Correct	4 ms	5196 KB	Output is correct
20	Correct	4 ms	5292 KB	Output is correct
21	Correct	3 ms	5196 KB	Output is correct
22	Correct	4 ms	5196 KB	Output is correct
23	Correct	4 ms	5196 KB	Output is correct
24	Correct	6 ms	5308 KB	Output is correct

Subtask #2
70.0 / 70.0

#	결과	실행 시간	메모리	Grader output
1	Correct	28 ms	8344 KB	Output is correct
2	Correct	35 ms	9516 KB	Output is correct
3	Correct	41 ms	8420 KB	Output is correct
4	Correct	45 ms	9776 KB	Output is correct
5	Correct	37 ms	8264 KB	Output is correct
6	Correct	27 ms	8456 KB	Output is correct
7	Correct	36 ms	8876 KB	Output is correct
8	Correct	32 ms	8940 KB	Output is correct
9	Correct	50 ms	10408 KB	Output is correct
10	Correct	188 ms	23464 KB	Output is correct
11	Correct	74 ms	11972 KB	Output is correct
12	Correct	98 ms	14016 KB	Output is correct
13	Correct	86 ms	12644 KB	Output is correct
14	Correct	70 ms	11388 KB	Output is correct
15	Correct	97 ms	13924 KB	Output is correct
16	Correct	112 ms	14404 KB	Output is correct
17	Correct	94 ms	13292 KB	Output is correct
18	Correct	83 ms	13388 KB	Output is correct
19	Correct	125 ms	17428 KB	Output is correct
20	Correct	221 ms	26576 KB	Output is correct
21	Correct	137 ms	17212 KB	Output is correct
22	Correct	123 ms	15732 KB	Output is correct
23	Correct	136 ms	17068 KB	Output is correct
24	Correct	151 ms	16956 KB	Output is correct
25	Correct	109 ms	16380 KB	Output is correct
26	Correct	114 ms	15712 KB	Output is correct
27	Correct	144 ms	17160 KB	Output is correct
28	Correct	157 ms	17304 KB	Output is correct
29	Correct	180 ms	21044 KB	Output is correct
30	Correct	267 ms	28024 KB	Output is correct
31	Correct	171 ms	19048 KB	Output is correct
32	Correct	148 ms	17360 KB	Output is correct
33	Correct	150 ms	17596 KB	Output is correct
34	Correct	173 ms	18272 KB	Output is correct
35	Correct	143 ms	17560 KB	Output is correct
36	Correct	150 ms	18068 KB	Output is correct
37	Correct	182 ms	19812 KB	Output is correct
38	Correct	179 ms	19504 KB	Output is correct
39	Correct	183 ms	19588 KB	Output is correct
40	Correct	251 ms	25920 KB	Output is correct
41	Correct	324 ms	33604 KB	Output is correct

답안 #391816

Compilation message

Subtask #1 30.0 / 30.0

Subtask #2 70.0 / 70.0

Subtask #1
30.0 / 30.0

Subtask #2
70.0 / 70.0