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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#569999 | #9319. Bull Farm | lixp | RE | 2ms | 13936kb | C++17 | 3.3kb | 2024-09-17 13:09:48 | 2024-09-17 13:09:48 |
Judging History
answer
#include<bits/stdc++.h>
#define mk make_pair
using namespace std;
const int N=2005,M=1e6+10;
int n,m,t,ans[N],p[N][N];
char s[N];
struct qst {
int nm,ts,a,b;
} q[M];
bitset<N> opt[N],f[N];
int tg[N],pre[N];
int fir[N],ne[M],to[M],cnt;
void add(int x,int y) {
ne[++cnt]=fir[x];
fir[x]=cnt;
to[cnt]=y;
}
int Fir[N],Ne[M],To[M],Cnt;
void Add(int x,int y) {
Ne[++Cnt]=Fir[x];
Fir[x]=Cnt;
To[Cnt]=y;
}
int dfn[N],low[N],cl[N],nm,st[N],tp,tt;
void dfs(int x) {
dfn[x]=low[x]=++tt;
st[++tp]=x;
for(int i=fir[x];i;i=ne[i]) {
int y=to[i];
if(!dfn[y]) dfs(y),low[x]=min(low[x],low[y]);
else if(!cl[y]) low[x]=min(low[x],dfn[y]);
}
if(low[x]==dfn[x]) {
// cout<<"!@# "<<x<<"\n";
nm++;f[nm][x]=1;cl[x]=nm;
while(st[tp]!=x) f[nm][st[tp]]=1,cl[st[tp]]=nm,tp--;
tp--;
}
}
void init() {
for(int i=1;i<=n;i++) opt[i].reset();
for(int i=1;i<=n;i++) fir[i]=0; cnt=0;
}
bool cmp(const qst &x,const qst &y) {
return x.ts<y.ts;
}
int rd[N];
void ins(int tm) {
int flag=0; pair<int,int> W;
for(int i=1;i<=n;i++) tg[i]=0;
for(int i=1;i<=n;i++) pre[i]=0;
for(int i=1;i<=n;i++) {
pre[p[tm][i]]=i;
if(tg[p[tm][i]]) {
if(flag) return;
flag=p[tm][i]; W=mk(tg[p[tm][i]],i);
} else tg[p[tm][i]]=i;
}
// cout<<"! "<<flag<<"\n";
if(!flag) {
for(int i=1;i<=n;i++)
add(i,p[tm][i]);
} else {
int xx=W.first,yy=W.second;
while(pre[xx] && pre[xx]!=flag) xx=pre[xx];
while(pre[yy] && pre[yy]!=flag) yy=pre[yy];
if(!pre[yy]) xx=yy;
// cout<<"! "<<W.first<<" "<<W.second<<" "<<xx<<"\n";
add(W.first,xx);add(W.second,xx);
}
// cout<<"----------------------------------------\n";
// for(int i=1;i<=n;i++) cout<<f[i]<<"\n";
// cout<<endl;
for(int i=1;i<=n;i++) dfn[i]=low[i]=cl[i]=0,rd[i]=0;
for(int i=1;i<=nm;i++) f[i].reset();
for(int i=1;i<=nm;i++) Fir[i]=0;
tp=nm=tt=0;Cnt=0;
for(int i=1;i<=n;i++) if(!dfn[i]) dfs(i);
for(int x=1;x<=n;x++) {
for(int i=fir[x];i;i=ne[i]) {
int y=to[i];
if(cl[x]!=cl[y]) Add(cl[y],cl[x]),rd[cl[x]]++;
}
}
queue<int> q;
for(int i=1;i<=nm;i++) if(!rd[i]) q.push(i);
// for(int i=1;i<=n;i++) cout<<i<<" -> "<<cl[i]<<"\n";
while(q.size()) {
int x=q.front();q.pop();
// cout<<x<<" "<<f[x][1]<<f[x][2]<<f[x][3]<<"\n";
for(int i=Fir[x];i;i=Ne[i]) {
int y=To[i]; rd[y]--;
f[y]|=f[x];
if(!rd[y]) q.push(y);
}
}
for(int i=1;i<=n;i++) opt[i]=f[cl[i]];
// for(int i=1;i<=n;i++) cout<<":: "<<i<<" "<<opt[i][1]<<opt[i][2]<<opt[i][3]<<"\n";
}
void solve() {
scanf("%d%d%d",&n,&m,&t);
for(int i=1;i<=n;i++) opt[i][i]=1;
for(int i=1;i<=m;i++) {
scanf("%s",s+1);
for(int j=1;j<=2*n;j+=2)
p[i][j/2+1]=(s[j]-'0')*50+(s[j+1]-'0');
}
for(int i=1;i<=t;i++) {
scanf("%s",s+1);
q[i].a=(s[1]-'0')*50+(s[2]-'0');
q[i].b=(s[3]-'0')*50+(s[4]-'0');
q[i].ts=(s[5]-'0')*50+(s[6]-'0'); q[i].nm=i;
}
sort(q+1,q+t+1,cmp);
int nw=1;
for(int i=1;i<=t;i++) {
// cout<<i<<" "<<q[i].ts<<"\n";
while(nw<=m && nw<=q[i].ts) ins(nw++);
ans[q[i].nm]=opt[q[i].a][q[i].b];
}
// cout<<"####### ";
for(int i=1;i<=t;i++) cout<<ans[i];
cout<<endl;
}
int main() {
int T;scanf("%d",&T);
while(T--) {
init(); solve();
}
return 0;
}
/*
1
3 1 1
030301
010202
*/
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 2ms
memory: 13876kb
input:
2 5 2 4 0305040201 0404040404 030300 020500 050102 020501 6 2 4 030603010601 010203060504 030202 060402 050602 060401
output:
1011 0100
result:
ok 2 lines
Test #2:
score: 0
Accepted
time: 2ms
memory: 13936kb
input:
1 3 3 6 020202 030301 030201 020102 030203 010201 010303 020303 010202
output:
010101
result:
ok single line: '010101'
Test #3:
score: -100
Runtime Error
input:
200 10 10 5000 01060:04020305080709 0103070:060204050908 09070503080401060:02 050308010204090:0607 03010502040607080:09 03080109020504060:07 06050:09040302080107 07080305010409060:02 030809010:0204060507 0:060908070201050304 060700 090:03 09080: 070405 010703 0:0100 080601 030600 070206 0:0:09 08040...