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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#727788 | #9573. Social Media | ucup-team5296# | WA | 36ms | 7996kb | C++20 | 1.9kb | 2024-11-09 13:49:46 | 2024-11-09 13:49:47 |
Judging History
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'