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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#182886 | #5407. 基础图论练习题 | FLY | 0 | 102ms | 110416kb | C++14 | 5.0kb | 2023-09-18 18:02:12 | 2023-09-18 18:02:12 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ull unsigned long long
#define For(i,a,b) for(int i=(a);i<=(b);i++)
#define dFor(i,a,b) for(int i=(a);i>=(b);i--)
#define abs_(x) max(x,-(x))
#define tomin(x,y) x=min(x,y)
#define tomax(x,y) x=max(x,y)
#define eq(x,y) (abs_((x)-(y))<=eps)
#define db double
#define pw(x) ((x)*(x))
#define y1 __
#define vci vector<int>
#define pb push_back
#define all(x) x.begin(),x.end()
constexpr int N=5e3+5,P=1e9+7;
int read()
{
int x=0,y=1;
char c=getchar();
for(;!isdigit(c);c=getchar()) if(c=='-') y=0;
for(;isdigit(c);c=getchar()) x=(x<<3)+(x<<1)+(c^48);
return y?x:-x;
}
char getc()
{
char c=getchar();
for(;!isdigit(c)&&!isalpha(c);c=getchar()) ;
return c;
}
int turn(char t)
{
if(isdigit(t)) return t-'0';
return t-'A'+10;
}
int n;
bool e[N][N];
vector<int> scc[N];
vector<int> e2[N];
int bel[N];
int stk[N],dfn[N],low[N],tot,ct,ct2;
bool vs[N];
int ans[N][N];
void tarjan(int u)
{
// cout<<"<<"<<u<<" "<<dfn[u]<<endl;
vs[u]=1;
dfn[u]=low[u]=++tot;
stk[++ct]=u;
For(v,1,n) if(e[u][v])
{
if(!dfn[v]) { tarjan(v); low[u]=min(low[u],low[v]); }
else if(vs[v]) low[u]=min(low[u],low[v]);
}
if(low[u]==dfn[u])
{
ct2++;
do
{
int v=stk[ct--];
vs[v]=0;
bel[v]=ct2;
scc[ct2].pb(v);
}while(stk[ct+1]!=u);
}
}
int cid[N];
int rd[N];
int q[N];
int Sum;
void tarjan2(int u)
{
vs[u]=1;
dfn[u]=low[u]=++tot;
stk[++ct]=u;
For(v,1,n) if(e[u][v])
{
if(!dfn[v]) { tarjan2(v); low[u]=min(low[u],low[v]); }
else if(vs[v]) low[u]=min(low[u],low[v]);
}
if(low[u]==dfn[u])
{
Sum++;
do
{
int v=stk[ct--];
vs[v]=0;
}while(stk[ct+1]!=u);
}
}
void cls()
{
tot=ct=ct2=0;
memset(vs,0,n+2);
memset(dfn,0,n+2<<2);
memset(stk,0,n+2<<2);
}
void solve(vector<int> nw)
{
// cout<<"A";
int sz=nw.size();
// cout<<" "<<sz<<endl;
// For(i,0,sz-1) cout<<nw[i]<<" "; puts("");
vector<int> h;
for(int u:nw)
{
if(h.empty()) { h.pb(u); continue; }
if(e[u][h[0]]) { h.insert(h.begin(),u); continue; }
if(e[h.back()][u]) { h.pb(u); continue; }
for(int i=0;;i++)
{
if(e[h[i]][u]&&e[u][h[i+1]])
{
h.insert(h.begin()+i+1,u);
break;
}
}
}
// cout<<"B";
// for(int u:h) cout<<u<<" "; puts("");
int t=0;
if(sz==1) goto ok;
for(int i=1;;i++)
{
if(e[h[i]][h[0]]) { t=i; break; }
}
for(int i=t+1;i<sz;i++)
{
For(j,0,t)
{
if(e[h[i]][h[j]])
{
vector<int> ls;
For(l,j,t) ls.pb(h[l]);
For(l,0,j-1) ls.pb(h[l]);
For(l,t+1,i) ls.pb(h[l]);
For(l,0,i) h[i]=ls[i];
t=i;
break;
}
}
}
// cout<<"C";
for(int i=0;i<sz;i++)
{
int u=h[i],v=h[(i+1)%sz];
if(!e[u][v]) puts("FLY");
}
// puts("FLY");
// for(int u:nw) cout<<u<<" "; puts("");
// for(int u:h) cout<<u<<" "; puts("");
// return;
For(i,0,sz-1)
{
int u=h[i],v=h[(i+1)%sz];
e[u][v]=0,e[v][u]=1;
cls();
Sum=0;
For(u,1,n) if(!dfn[u]) tarjan2(u);
ans[u][v]=Sum;
e[u][v]=1,e[v][u]=0;
}
ok: ;
// cout<<"D";
}
int h[N][N];
int pw2[N*N];
int work()
{
n=read();
For(i,1,n) For(j,1,n) e[i][j]=h[i][j]=0;
For(i,1,n) scc[i].clear();
For(i,1,n) e2[i].clear();
// int m=n*(n-1)/2;
// For(i,1,m)
// {
// int u=read(),v=read();
// e[u][v]=1;
// }
For(i,1,n-1)
{
int up=(i+3)>>2;
For(j,1,up)
{
int t=turn(getc());
For(k,0,3)
{
bool tt=t>>k&1;
int t1=i+1,t2=4*j+k-3;
if(t2<t1)
{
if(tt) e[t1][t2]=1;
else e[t2][t1]=1;
}
}
}
}
// For(i,1,n)
// {
// For(j,1,n) putchar(e[i][j]+'0'); puts("");
// }
cls();
// puts("FLY");
For(i,1,n) if(!dfn[i]) tarjan(i);
// puts("SKY");
memset(rd,0,n+2<<2);
For(u,1,n)
{
For(v,1,n) if(e[u][v]&&bel[u]!=bel[v])
{
int t1=bel[u],t2=bel[v];
h[t1][t2]++;
e2[t1].pb(t2);
rd[t2]++;
}
}
int l=1,r=0;
For(i,1,ct2) if(!rd[i]) q[++r]=i;
while(l<=r)
{
int u=q[l++];
cid[u]=l-1;
for(auto v:e2[u])
{
rd[v]--;
if(!rd[v]) q[++r]=v;
}
}
// cout<<ct2<<endl;
// puts("RUI");
For(i,1,n) For(j,1,n) ans[i][j]=ct2;
// For(i,1,r) cout<<bel[q[i]]<<" "; puts("");
For(i,1,n) For(j,1,n) if(e[i][j]&&bel[i]!=bel[j])
{
int u=bel[i],v=bel[j];
ans[i][j]=ct2-(cid[v]-cid[u]);
if(cid[v]-cid[u]==1&&h[u][v]==1) ans[i][j]++;
// cout<<i<<" "<<j<<" "<<cid[u]<<" "<<cid[v]<<" "<<u<<" "<<v<<" "<<ans[i][j]<<endl;
}
int tct2=ct2;
For(i,1,tct2) solve(scc[i]);
// puts("ONE");
int Ans=0;
For(i,1,n)
{
For(j,1,i-1)
{
int t=(e[i][j]?ans[i][j]:ans[j][i]);
Ans=(Ans+pw2[(i-2)*(i-1)/2+j-1]*1ll*t)%P;
// cout<<" "<<j<<" "<<i<<" "<<t<<endl;
}
}
return Ans;
// For(i,1,n)
// {
// For(j,1,n) putchar(e[i][j]+'0');
// puts("");
// }
}
int main()
{
// return 0;
pw2[0]=1;
For(i,1,N*N-5) pw2[i]=(pw2[i-1]+pw2[i-1])%P;
int T=read();
while(T--) printf("%d\n",work());
return 0;
}
/*
1
6
1 2
2 3
3 1
4 5
5 6
6 4
1 4
1 5
1 6
2 4
2 5
2 6
3 4
3 5
3 6
*/
Details
Tip: Click on the bar to expand more detailed information
Subtask #1:
score: 0
Wrong Answer
Test #1:
score: 0
Wrong Answer
time: 102ms
memory: 110416kb
input:
10000 100 1 2 2 8 C0 F0 27 78 AE1 C01 511 D87 EF20 3873 2742 73D0 DC9B0 FB2A3 9C011 9B4E0 95DC00 A7B980 F43531 6A6245 5347BE0 1A6C8A1 88E46D6 64CF3AE D25F63C1 C894E4C3 1C0AFD73 EC1C3F9A 087CE17C0 22149A380 B28038AF1 B9CA21C7F D78F5307C1 49045489A2 72C4DE6FD1 7713F40D05 EEE8878EEC1 310E62812B1 DA9D5B...
output:
FLY 281603732 13 FLY 285212672 FLY 371842543 84 0 1983 2 FLY 268505087 268435455 FLY 719476259 32785 2 719476771 FLY 111 2621567 2523 0 719476275 FLY 371842543 2097159 FLY 41087 34815 3113984 FLY 719478307 502774846 719476267 719476259 FLY 719476259 FLY 65128 FLY 268435467 719477283 36863 2171007 71...
result:
wrong output format Expected integer, but "FLY" found
Subtask #2:
score: 0
Skipped
Dependency #1:
0%
Subtask #3:
score: 0
Skipped
Dependency #1:
0%
Subtask #4:
score: 0
Skipped
Dependency #1:
0%
Subtask #5:
score: 0
Skipped
Dependency #1:
0%