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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#727788#9573. Social Mediaucup-team5296#WA 36ms7996kbC++201.9kb2024-11-09 13:49:462024-11-09 13:49:47

Judging History

你现在查看的是最新测评结果

  • [2024-11-09 13:49:47]
  • 评测
  • 测评结果:WA
  • 用时:36ms
  • 内存:7996kb
  • [2024-11-09 13:49:46]
  • 提交

answer

#include<bits/stdc++.h>
#define ll long long
#define eb emplace_back
#define ep emplace
#define pii pair<int,int>
#define fi first
#define se second
#define debug(...) fprintf(stderr,__VA_ARGS__)
#define mems(arr,x) memset(arr,x,sizeof(arr))
#define memc(arr1,arr2) memcpy(arr1,arr2,sizeof(arr2))
using namespace std;
const int maxn=2e5+10;
int n,m,k;
int a[maxn];
bool in[maxn],bk[maxn];
namespace Graph{
    const int maxm=maxn<<1;
    #define go(x,i) for(int i=head[x];i;i=e[i].nxt)
    int cnt=1;
    int head[maxn];
    struct edge{int nxt,to;}e[maxm];
    inline void add(int u,int v){e[++cnt]={head[u],v};head[u]=cnt;}
    inline void adde(int u,int v){add(u,v);add(v,u);}
    inline void rebuild(){cnt=1;for(int i=1;i<=k;i++)head[i]=0;}
}
using namespace Graph;
int ans;
int w[maxn],ww[maxn];
map<pii,int> mp;
pii E[maxn];
void bfs(){
    for(int u=1;u<=k;u++){
        if(!in[u])  continue;
        go(u,i){
            int t=e[i].to;
            if(in[t])   continue;
            bk[t]=true;
            w[t]++;
        }
    }
    for(int i=1;i<=k;i++)   ww[i]=w[i];
    sort(ww+1,ww+k+1,greater<int>());
    ans=ww[1]+ww[2];
    for(int i=1;i<=m;i++){
        int u=E[i].fi,v=E[i].se;
        if(u==v||in[u]||in[v])    continue;
        if(!bk[u]&&!bk[v])  continue;
        // printf("%d %d : %d %d %d\n",u,v,w[u],w[v],mp[{u,v}]);
        ans=max(ans,w[u]+mp[{u,v}]+w[v]);
    }
}
void solve(){
    ans=0;
    rebuild();
    mp.clear();
    for(int i=1;i<=k;i++)   in[i]=w[i]=bk[i]=0;
    scanf("%d%d%d",&n,&m,&k);
    for(int i=1;i<=n;i++){scanf("%d",&a[i]);in[a[i]]=true;}
    for(int i=1;i<=m;i++){
        int u,v;scanf("%d%d",&u,&v);
        mp[{u,v}]++;mp[{v,u}]++;
        if(u==v)    w[u]++;
        E[i]=pii(u,v);
        adde(u,v);
    }
    bfs();
    for(int i=1;i<=m;i++)
        ans+=(in[E[i].fi]&&in[E[i].se]);
    printf("%d\n",ans);
}
int main(){
    int T;scanf("%d",&T);while(T--)solve();
}

Details

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Test #1:

score: 100
Accepted
time: 1ms
memory: 7996kb

input:

5
4 12 7
5 7 3 6
3 6
2 2
1 4
2 4
1 3
7 6
4 1
5 4
1 1
1 1
2 1
3 7
2 7 6
2 4
1 2
3 2
2 5
5 4
2 6
4 6
2 6
1 1 2
1
1 2
2 1 2
1 2
1 2
2 1 100
24 11
11 24

output:

9
5
1
1
1

result:

ok 5 number(s): "9 5 1 1 1"

Test #2:

score: -100
Wrong Answer
time: 36ms
memory: 7876kb

input:

10000
19 12 20
8 12 1 5 11 7 17 13 19 6 3 9 10 15 14 20 4 18 16
4 11
7 1
8 4
16 19
1 13
15 2
16 2
8 7
3 15
11 13
5 20
18 14
17 14 20
2 9 1 12 8 11 10 17 18 16 3 15 5 14 20 13 7
15 10
3 2
5 16
7 8
6 1
6 4
18 16
1 8
4 1
20 6
6 9
4 15
7 5
14 9
1 3 18
9
15 18
17 15
11 14
7 19 7
3 1 2 5 6 4 7
5 1
4 5
3 1...

output:

12
14
0
19
6
5
1
14
19
4
3
10
4
1
4
19
15
2
18
4
17
5
0
2
5
19
3
3
6
15
7
1
6
4
4
7
3
7
4
1
16
16
2
3
6
12
12
7
6
9
8
7
9
11
16
0
4
9
8
16
2
8
22
22
17
8
22
15
8
13
7
9
6
9
2
17
10
5
5
3
6
6
20
8
13
12
10
5
2
6
2
0
8
5
8
12
7
15
10
9
9
11
9
9
6
2
8
15
11
5
3
5
5
10
1
6
9
18
5
3
20
1
4
8
8
10
4
3
1
1...

result:

wrong answer 3rd numbers differ - expected: '1', found: '0'