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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 |
---|---|---|---|---|---|---|---|---|---|
#243105 | #4758. Captivating process | serene_analysis | WA | 63ms | 292256kb | C++14 | 6.8kb | 2023-11-07 21:01:51 | 2023-11-07 21:01:52 |
Judging History
answer
#include<algorithm>
#include<cstdio>
#include<vector>
#include<map>
#include<set>
const int maxn=4e5+5;
const int logn=2e1+5;
int n,m;
struct tree{
std::vector<int>son[maxn];
bool vis[maxn],in[maxn],lop[maxn];
int to[maxn],stk[maxn],scnt,bel[maxn],pid[maxn],up[maxn][logn];
std::vector<int>apr[maxn];
int bcnt;
void go(int x){
// printf("go:%d,to[x]=%d,vis[to]=%d,in[to[x]]=%d\n",x,to[x],vis[to[x]],in[to[x]]);
stk[++scnt]=x,in[x]=true,vis[x]=true;
if(!vis[to[x]])go(to[x]);
else if(in[to[x]]){
bcnt++,stk[scnt+1]=0;
while(stk[scnt+1]!=to[x])bel[stk[scnt]]=bcnt,in[stk[scnt]]=false,lop[stk[scnt]]=true,scnt--;
int p=to[x];
do{
// printf("pid[%d]=%d\n",p,(int)apr[bcnt].size());
pid[p]=apr[bcnt].size(),apr[bcnt].push_back(p),p=to[p];
}while(p!=to[x]);
while(scnt)in[stk[scnt]]=false,scnt--;
}
if(scnt)scnt--,in[x]=false;
return;
}
int d[maxn],size[maxn],dfn[maxn],alt;
int over(int x,int gd){
if(gd>d[x])fprintf(stderr,"shik\n");
for(int i=logn-2;i>=0;i--)if((gd>>i)&1)x=up[x][i];
return x;
}
bool have(int x,int y){return dfn[y]>=dfn[x]&&dfn[y]<=dfn[x]+size[x]-1;}
void divide(int x){
// printf("x=%d,d[x]=%d\n",x,d[x]);
size[x]=1,dfn[x]=++alt;
for(int j=1;j<=logn-2;j++)up[x][j]=up[up[x][j-1]][j-1];
for(int v:son[x]){
if(lop[v])continue;
// printf("x=%d,v=%d\n",x,v);
d[v]=d[x]+1,up[v][0]=x,divide(v),size[x]+=size[v];
}
return;
}
void init(){
for(int i=1;i<=n;i++)scanf("%d",to+i),son[to[i]].push_back(i);
for(int i=1;i<=n;i++)if(!vis[i])go(i);
for(int i=1;i<=n;i++)if(lop[i])divide(i);
return;
}
}ft,st;
struct seg{
int l,r;
friend bool operator<(seg now,seg oth){return now.l==oth.l?now.r<oth.r:now.l<oth.l;}
};
bool can[maxn][3];
struct ques{int wz,id;};
std::vector<ques>fqu[maxn],squ[maxn];
std::set<seg>sapr[maxn];
bool have(int ip,int x){
// if(ip<=0||ip>=maxn)fprintf(stderr,"shik\n");
auto dt=sapr[ip].lower_bound((seg){x,0});
if(dt==sapr[ip].begin())return false;
// fprintf(stderr,"have=%d\n",std::prev(dt)->r>=x);
return std::prev(dt)->r>=x;
}
void fgo(int x){
int ip=ft.d[x]-st.d[x]+maxn/2;
// printf("fgo:%d,ip=%d,lin={%d,%d}\n",x,ip,ft.dfn[x],ft.dfn[x]+ft.size[x]-1);
bool ins=false;
if(!have(ip,ft.dfn[x]))ins=true,sapr[ip].insert((seg){ft.dfn[x],ft.dfn[x]+ft.size[x]-1});
// if(x==60){
// printf("x=%d,ft.dfn[x]=%d,st.up[x][0]=%d,ip=%d,ins=%d\n",x,ft.dfn[x],st.up[x][0],ip,ins);
// }
for(ques now:fqu[x]){
// printf("query,now.wz=%d,now.id=%d\n",now.wz,now.id);
can[now.id][0]|=have(ft.d[now.wz]-st.d[x]+maxn/2,ft.dfn[now.wz]);
// if(now.id==4708)printf("can[now.id][0]=%d,ft.dfn[now.wz]=%d\n",can[now.id][0],ft.dfn[now.wz]);
}
for(int v:st.son[x])if(!st.lop[v])fgo(v);
if(ins)sapr[ip].erase((seg){ft.dfn[x],ft.dfn[x]+ft.size[x]-1})/*,printf("ctrl_z:%d\n",x)*/;
return;
}
std::set<int>papr[maxn];
void sgo(int x){
// if(x==11)printf("sgo:%d\n",x);
if(!ft.lop[x]){
// printf("not on loop\n");
for(ques now:squ[x])can[now.id][1]|=papr[ft.bel[now.wz]]
.find((ft.pid[now.wz]+st.d[x])%ft.apr[ft.bel[now.wz]].size())!=papr[ft.bel[now.wz]].end();
for(int v:st.son[x])if(!st.lop[v])sgo(v);
return;
}
bool ins=false;
int ip=(ft.pid[x]+st.d[x])%ft.apr[ft.bel[x]].size();
if(papr[ft.bel[x]].empty()||papr[ft.bel[x]].find(ip)==papr[ft.bel[x]].end())ins=true,papr[ft.bel[x]].insert(ip);
// if(x==3||x==11){
// printf("x=%d,ft.bel[x]=%d,papr[ft.bel[x]].size()=%d,st.up[x][0]=%d,ip=%d,ins=%d\n",
// x,ft.bel[x],(int)papr[ft.bel[x]].size(),st.up[x][0],ip,ins);
// }
for(ques now:squ[x]){
// if(x==40489)printf("now.wz=%d,ft.bel[now.wz]=%d,x=%d,gv=%d\n",now.wz,ft.bel[now.wz],x,
// (int)((ft.pid[now.wz]+st.d[x])%ft.apr[ft.bel[now.wz]].size()));
can[now.id][1]|=papr[ft.bel[now.wz]].find
((ft.pid[now.wz]+st.d[x])%ft.apr[ft.bel[now.wz]].size())!=papr[ft.bel[now.wz]].end();
// if(now.id==2665)printf("can[now.id][1]=%d\n",can[now.id][1]);
}
for(int v:st.son[x])if(!st.lop[v])sgo(v);
if(ins)papr[ft.bel[x]].erase(ip);
return;
}
int qx[maxn],qy[maxn];
int gcd(int a,int b){return b?gcd(b,a%b):a;}
struct pii{
int x,y;
friend bool operator<(pii now,pii oth){return now.x==oth.x?now.y<oth.y:now.x<oth.x;}
};
std::map<pii,bool>apr[maxn];
signed main(){
// freopen("wait.in","r",stdin);
// freopen("wait.out","w",stdout);
scanf("%d%d",&n,&m);
ft.init(),st.init();
// printf("st.lop[11]=%d,st.d[11]=%d,st.up[11][0]=%d\n",st.lop[11],st.d[11],st.up[11][0]);
for(int i=1;i<=n;i++)if(ft.lop[i]&&st.lop[i]){
int fp=ft.bel[i],sp=st.bel[i],d=gcd(ft.apr[fp].size(),st.apr[sp].size());
// if(i==28){
// printf("i=%d,ft.lop&&st.lop\n",i);
// printf("fp=%d,sp=%d,d=%d\n",fp,sp,d);
// }
apr[((ft.pid[i]-st.pid[i])%d+d)%d][{fp,sp}]=true;
}
for(int i=1;i<=m;i++){
scanf("%d%d",qx+i,qy+i),fqu[qy[i]].push_back((ques){qx[i],i});
int fd=ft.d[qx[i]],sd=st.d[qy[i]];
// printf("qx[i]=%d,qy[i]=%d,fd=%d,sd=%d\n",qx[i],qy[i],fd,sd);
// if(i==4708){
// fprintf(stderr,"qx[i]=%d,qy[i]=%d\n",qx[i],qy[i]);
// for(int x=1;x<=n;x++)if(ft.have(x,qx[i])&&st.have(x,qy[i])&&
// ft.d[x]-st.d[x]==ft.d[qx[i]]-st.d[qy[i]])printf("x=%d\n",x);
// int x=qx[i],y=qy[i];
// while(x!=y){
// printf("x=%d,y=%d\n",x,y);
// x=ft.to[x],y=st.to[y];
// }
// printf("ok,x=%d\n",x);
// printf("ok,x=%d,ft.pid[x]=%d,ft.pid[qx[i]]=%d,st.d[qy[i]]=%d,st.d[x]=%d,ft.apr[ft.bel[x]].size()=%d,ans=%d\n",
// x,ft.pid[x],ft.pid[qx[i]],st.d[qy[i]],st.d[x],(int)ft.apr[ft.bel[x]].size(),
// (int)((ft.pid[x]-ft.pid[qx[i]]-st.d[qy[i]]+st.d[x])%ft.apr[ft.bel[x]].size()));
// }
if(fd<=sd){
int x=ft.over(qx[i],fd),y=st.over(qy[i],fd);
squ[y].push_back((ques){x,i});
x=ft.apr[ft.bel[x]][(ft.pid[x]+sd-fd)%ft.apr[ft.bel[x]].size()],y=st.over(y,sd-fd);
int fp=ft.bel[x],sp=st.bel[y],d=gcd(ft.apr[fp].size(),st.apr[sp].size());
can[i][2]|=apr[((ft.pid[x]-st.pid[y])%d+d)%d][{fp,sp}];
}
else{
int x=ft.over(qx[i],fd),y=st.over(qy[i],sd);
y=st.apr[st.bel[y]][(st.pid[y]+fd-sd)%st.apr[st.bel[y]].size()];
int fp=ft.bel[x],sp=st.bel[y],d=gcd(ft.apr[fp].size(),st.apr[sp].size());
can[i][2]|=apr[((ft.pid[x]-st.pid[y])%d+d)%d][{fp,sp}];
}
}
for(int i=1;i<=n;i++)if(st.lop[i])fgo(i),sgo(i);
for(int i=1;i<=n;i++)fqu[i].clear(),squ[i].clear();
// printf("fir,ok\n");
std::swap(ft,st);
for(int i=1;i<=m;i++){
std::swap(qx[i],qy[i]);
int fd=ft.d[qx[i]],sd=st.d[qy[i]];
// printf("qx[i]=%d,qy[i]=%d\n",qx[i],qy[i]);
if(fd<=sd){
int x=ft.over(qx[i],fd),y=st.over(qy[i],fd);
// printf("fd=%d,sd=%d,over,x=%d,y=%d\n",fd,sd,x,y);
squ[y].push_back((ques){x,i});
}
}
for(int i=1;i<=n;i++)if(st.lop[i])sgo(i);
for(int i=1;i<=m;i++){
// printf("i=%d\n",i);
printf("%s\n",can[i][0]||can[i][1]||can[i][2]?"YES":"NO");
}
return 0;
}
/*
10 5
1 4 5 8 3 3 2 7 8 1
1 4 5 8 3 3 2 7 8 1
2 3
4 5
6 7
8 9
1 10
*/
//namespace burningContract
详细
Test #1:
score: 100
Accepted
time: 43ms
memory: 292184kb
input:
3 2 2 3 1 2 3 1 1 2 1 1
output:
NO YES
result:
ok 2 token(s): yes count is 1, no count is 1
Test #2:
score: 0
Accepted
time: 63ms
memory: 292200kb
input:
4 2 2 3 4 2 2 4 4 1 1 2 1 4
output:
NO YES
result:
ok 2 token(s): yes count is 1, no count is 1
Test #3:
score: 0
Accepted
time: 36ms
memory: 292132kb
input:
10 10 7 7 8 10 5 7 9 3 2 3 4 2 7 1 3 3 10 1 9 3 7 8 7 6 7 9 1 5 3 6 5 3 10 6 8 9 9 4 6 7
output:
NO NO YES NO YES NO YES NO NO NO
result:
ok 10 token(s): yes count is 3, no count is 7
Test #4:
score: 0
Accepted
time: 47ms
memory: 292184kb
input:
10 10 5 7 8 2 6 8 7 5 5 10 8 2 5 8 3 9 10 7 2 8 8 7 5 6 4 9 3 6 5 6 2 3 8 4 5 9 6 8 3 4
output:
NO NO YES NO NO NO NO NO NO YES
result:
ok 10 token(s): yes count is 2, no count is 8
Test #5:
score: 0
Accepted
time: 56ms
memory: 292256kb
input:
10 10 1 9 4 4 2 6 7 8 9 4 1 9 9 5 5 1 3 9 3 10 1 7 3 8 7 8 9 8 6 9 10 7 3 5 1 7 8 5 8 5
output:
NO NO NO YES NO NO NO NO NO NO
result:
ok 10 token(s): yes count is 1, no count is 9
Test #6:
score: 0
Accepted
time: 51ms
memory: 292240kb
input:
10 10 8 2 4 4 7 10 9 9 10 5 5 4 9 3 10 6 10 10 5 4 7 8 2 3 6 2 1 2 2 10 5 4 10 4 10 9 10 7 6 1
output:
YES NO YES YES NO YES YES YES YES YES
result:
ok 10 token(s): yes count is 8, no count is 2
Test #7:
score: 0
Accepted
time: 53ms
memory: 292180kb
input:
10 10 4 4 8 3 7 7 7 2 10 9 4 10 6 6 4 10 5 8 5 9 3 7 6 2 1 2 3 2 4 7 1 9 6 5 5 10 6 1 5 2
output:
YES NO YES YES YES YES NO NO NO NO
result:
ok 10 token(s): yes count is 5, no count is 5
Test #8:
score: 0
Accepted
time: 53ms
memory: 292184kb
input:
10 10 3 10 1 8 8 3 8 4 9 10 8 6 4 2 10 3 6 3 4 10 2 7 8 3 2 8 3 3 1 9 4 3 6 8 5 10 8 8 6 8
output:
NO YES NO YES NO NO YES NO YES YES
result:
ok 10 token(s): yes count is 5, no count is 5
Test #9:
score: 0
Accepted
time: 48ms
memory: 292184kb
input:
10 10 1 8 3 5 4 2 6 7 8 7 6 4 6 3 8 7 4 3 9 4 8 2 4 2 4 2 4 3 3 10 4 10 7 1 7 8 4 2 6 3
output:
NO NO NO NO YES NO YES NO NO NO
result:
ok 10 token(s): yes count is 2, no count is 8
Test #10:
score: 0
Accepted
time: 60ms
memory: 292184kb
input:
10 10 5 4 7 3 3 6 4 8 2 9 1 5 2 2 6 3 2 4 1 5 4 4 10 2 2 7 6 4 9 6 9 10 10 9 7 4 7 7 5 4
output:
YES YES YES YES YES YES NO YES YES YES
result:
ok 10 token(s): yes count is 9, no count is 1
Test #11:
score: 0
Accepted
time: 55ms
memory: 292144kb
input:
100 100 41 55 57 45 38 30 83 53 33 51 90 57 82 35 28 54 35 47 39 68 67 98 57 8 71 99 83 39 83 44 76 88 18 41 15 17 39 46 79 79 54 28 57 22 81 33 63 17 1 21 32 58 47 17 4 46 10 45 97 44 29 71 5 50 79 66 83 88 43 97 50 56 5 100 23 1 66 16 76 34 71 60 59 57 87 47 6 23 68 55 79 32 73 10 98 65 90 30 79 5...
output:
YES NO NO YES NO YES YES NO NO YES NO NO YES YES NO NO NO NO YES YES NO YES NO NO NO NO NO NO NO NO NO NO YES NO NO NO NO NO YES NO YES NO NO NO YES YES NO YES NO YES YES NO NO NO NO NO NO NO YES NO NO NO YES NO NO YES NO NO NO NO NO NO YES YES NO YES NO NO YES NO NO NO NO YES YES YES NO NO NO YES N...
result:
ok 100 token(s): yes count is 35, no count is 65
Test #12:
score: 0
Accepted
time: 48ms
memory: 292104kb
input:
100 100 70 57 94 89 18 74 52 32 87 20 73 47 60 55 74 37 33 81 55 2 23 23 69 23 52 12 92 85 38 25 41 66 49 94 27 50 23 35 23 38 58 81 75 92 11 6 36 33 8 60 13 2 58 93 59 67 46 95 45 12 56 87 31 25 18 5 17 10 95 47 38 72 87 84 17 39 74 36 39 23 91 90 86 68 23 20 38 29 60 60 56 19 66 43 21 7 84 25 41 5...
output:
YES NO NO YES NO YES NO NO NO NO NO NO YES NO YES YES NO NO NO NO NO NO NO NO NO NO NO NO YES NO YES NO NO YES YES YES YES YES YES NO NO YES NO YES YES NO NO NO NO YES NO NO YES NO NO YES YES YES NO NO NO NO YES YES NO NO NO NO YES NO YES NO NO NO NO NO NO NO NO YES NO YES NO NO NO NO NO NO NO NO NO...
result:
ok 100 token(s): yes count is 28, no count is 72
Test #13:
score: -100
Wrong Answer
time: 42ms
memory: 292208kb
input:
100 100 48 86 67 28 67 38 10 31 5 90 67 38 64 38 86 22 29 71 25 27 89 34 4 83 99 82 45 79 50 12 13 38 4 49 77 90 4 81 87 92 4 50 65 37 86 90 45 69 17 34 32 38 13 77 10 68 2 69 39 80 82 32 95 25 1 87 100 74 63 57 61 99 14 87 10 11 28 46 23 71 14 80 10 88 79 70 92 13 79 24 83 5 48 68 65 20 61 27 13 39...
output:
NO NO NO NO NO YES NO NO NO NO YES YES NO NO NO YES NO NO NO NO NO NO YES NO NO NO NO NO NO NO NO NO NO NO NO NO NO YES NO YES NO NO YES NO NO YES NO NO NO NO NO NO NO NO YES NO NO NO NO NO YES NO NO NO NO NO NO NO YES NO YES NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO YES NO NO NO NO NO N...
result:
wrong answer expected YES, found NO [75th token]