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QOJ
ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
---|---|---|---|---|---|---|---|---|---|
#99045 | #5504. Flower Garden | ice_cup | ML | 1ms | 15764kb | C++14 | 4.2kb | 2023-04-21 09:31:07 | 2023-04-21 09:31:12 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
int z,n,Q,head[5001000],to[10001000],nxt[10001000],v[5001000],cnt,tot;
int head1[5001000],to1[10001000],nxt1[10001000],cnt1;
int tr1[100100<<2],tr2[100100<<2];
int dfn[5001000],low[5001000],s[5001000],t,be[5001000],val[5001000],bel,tim,vis[5001000];
int c[5000100],dfs[5000100];
int in[5000100],d[5000100];
void add(int u,int e){
nxt[++cnt]=head[u];
to[cnt]=e;
head[u]=cnt;
}
void addd(int u,int e){
nxt1[++cnt1]=head1[u];
to1[cnt1]=e;
head1[u]=cnt1;
}
#define ls p<<1
#define rs p<<1|1
#define MID int mid=(l+r)>>1
//1向上连边 2向下连边
void build1(int l,int r,int p){
if(l==r){
tr1[p]=l;
v[tr1[p]]=1;
return;
}
tr1[p]=++tot;
MID;
build1(l,mid,ls),build1(mid+1,r,rs);
add(tr1[ls],tr1[p]),add(tr1[rs],tr1[p]);
}
void build2(int l,int r,int p){
if(l==r){
tr2[p]=l;
v[tr2[p]]=1;
return;
}
tr2[p]=++tot;
MID;
build2(l,mid,ls),build2(mid+1,r,rs);
add(tr2[p],tr2[ls]),add(tr2[p],tr2[rs]);
}
void link1(int l,int r,int lin,int rin,int p,int point){
if(l==lin&&r==rin){
add(tr1[p],point);
return;
}
MID;
if(rin<=mid)link1(l,mid,lin,rin,ls,point);
else if(lin>mid)link1(mid+1,r,lin,rin,rs,point);
else link1(l,mid,lin,mid,ls,point),link1(mid+1,r,mid+1,rin,rs,point);
}
void link2(int l,int r,int lin,int rin,int p,int point){
// cout<<l<<' '<<r<<' '<<lin<<' '<<rin<<endl;
if(l==lin&&r==rin){
add(point,tr2[p]);
return;
}
MID;
if(rin<=mid)link2(l,mid,lin,rin,ls,point);
else if(lin>mid)link2(mid+1,r,lin,rin,rs,point);
else link2(l,mid,lin,mid,ls,point),link2(mid+1,r,mid+1,rin,rs,point);
}
void tarjan(int u){
low[u]=dfn[u]=++tim;
s[++t]=u;
for(int i=head[u];i;i=nxt[i]){
if(!dfn[to[i]]){
tarjan(to[i]);//if(u==3)cout<<to[i]<<' '<<low[to[i]]<<endl;
low[u]=min(low[u],low[to[i]]);
}
else if(!vis[to[i]])low[u]=min(low[u],dfn[to[i]]);
}
if(low[u]==dfn[u]){
bel++;
// cout<<"oh "<<u<<endl;
while(s[t+1]!=u){
// cout<<s[t]<<' ';
be[s[t]]=bel;
vis[s[t]]=1;
val[bel]+=v[s[t]];
t--;
}
// cout<<endl;
}
}
queue<int>q;
int bfs1(int s){
int ans=0;
q.push(s);
while(!q.empty()){
int u=q.front();q.pop();
c[u]=1;
ans+=val[u];
for(int i=head1[u];i;i=nxt1[i]){
q.push(to1[i]);
}
}
return ans;
}
void bfs(){
for(int i=1;i<=tot;i++){
vis[i]=0;
}
for(int i=1;i<=bel;i++){
d[i]=-1;
if(!in[i])q.push(i),d[i]=0;
}
while(!q.empty()){
int u=q.front();q.pop();
vis[u]=0;
// cout<<u<<' ';
if(val[u])d[u]++;
for(int i=head1[u];i;i=nxt1[i]){
if(d[to1[i]]<d[u]){
d[to1[i]]=d[u];
if(!vis[to1[i]])q.push(to1[i]);
}
}
}
}
void solve(){
cin>>n>>Q;
tot=3*n;
build1(1,3*n,1);
build2(1,3*n,1);
int a1,a2,b1,b2;
while(Q--){
scanf("%d%d%d%d",&a1,&a2,&b1,&b2);
int ne=++tot;
link1(1,3*n,a1,a2,1,ne);
link2(1,3*n,b1,b2,1,ne);
}
// for(int u=1;u<=tot;u++){
// cout<<"p "<<u<<endl;
// for(int i=head[u];i;i=nxt[i]){
// cout<<to[i]<<' ';
// }
// cout<<endl;
// }
for(int i=1;i<=tot;i++){
if(!dfn[i]){
tarjan(i);
}
}
for(int u=1;u<=tot;u++){
for(int i=head[u];i;i=nxt[i]){
if(be[u]!=be[to[i]]){
addd(be[u],be[to[i]]);
// cout<<be[u]<<' '<<be[to[i]]<<endl;
in[be[to[i]]]++;
// cout<<to[i]<<' ';
}
}
}
int f=0;
for(int i=1;i<=bel;i++){
if(val[i]>n){
int re=bfs1(i);
if(re>=n&&re<=2*n){
f=1;
cout<<"TAK\n";
for(int i=1;i<=3*n;i++){
if(c[be[i]]==1)cout<<'F';
else cout<<'R';
}
cout<<'\n';
break;
}
else{
f=1;
cout<<"NIE\n";
}
}
}
if(!f){
bfs();
for(int i=1;i<=bel;i++){
if(val[i]){
dfs[d[i]]=i;
// cout<<d[i]<<' ';
}
}
int ans=0;
for(int i=1;i<=bel;i++){
ans+=val[dfs[i]];
c[dfs[i]]=1;
if(ans>=n&&ans<=2*n)break;
}
cout<<"TAK\n";
for(int i=1;i<=3*n;i++){
if(c[be[i]]==0)cout<<'F';
else cout<<'R';
}
cout<<'\n';
}
cnt=cnt1=t=0;
for(int i=1;i<=tot;i++){
head[i]=head1[i]=0;
dfn[i]=low[i]=0;
}
tot=0;
for(int i=1;i<=bel;i++){
be[i]=val[i]=c[i]=in[i]=0;
vis[i]=d[i]=dfs[i]=0;
}
bel=0;
}
int main(){
cin>>z;
while(z--)solve();
}
/*
1
1 3
1 1 2 2
1 2 3 3
1 1 3 3
*/
详细
Test #1:
score: 100
Accepted
time: 1ms
memory: 15764kb
input:
2 1 3 1 1 2 2 1 2 3 3 1 1 3 3 1 3 1 1 2 2 2 2 3 3 3 3 1 1
output:
TAK RFF NIE
result:
ok good!
Test #2:
score: -100
Memory Limit Exceeded
input:
10 33333 100000 28701 40192 93418 95143 95902 97908 78378 78461 36823 44196 22268 23996 23977 24786 33315 48829 83965 90411 4923 8445 20235 21177 32543 47454 29598 35414 72477 73049 2014 12632 42163 46466 64305 65518 98825 99552 32331 41625 92772 96224 26500 54122 76990 77126 18249 20335 31165 36080...
output:
NIE