oj.uz

답안 #937217

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
937217 2024-03-03T16:16:27 Z sleepntsheep Rigged Roads (NOI19_riggedroads) C++17
58 / 100
 2000 ms 30804 KB 
#include<stdio.h>
int hi(int a,int b){return a>b?a:b;}
unsigned X=12345;int rand_(){return(X*=3)>>1;}
int(*compar)(int,int);void sort(int*aa,int l,int r){ while(l<r){ int i=l,j=l,k=r,t,p=aa[l+rand_()%(r-l)]; while(j<k)switch(compar(aa[j],p)){case 0:++j;break;case -1:t=aa[i],aa[i]=aa[j],aa[j]=t,++i,++j;break;case 1:t=aa[--k],aa[k]=aa[j],aa[j]=t;break;}sort(aa,l,i);l=k; }}

#define N 300005


int ttt[N],n,m,h[N],e[N<<1][2],ne,y[N],id,pp[N],jj[N],ee[N],dd[N],w[N],tin[N],tout[N],timer;
void _l(int u,int v){e[++ne][0]=v,e[ne][1]=h[u],h[u]=ne;}

void __u(int*t,int p,int k){ for(;p<N;p+=p&-p)t[p]+=k; }
int __q(int*t,int p){int z=0;for(;p;p-=p&-p)z+=t[p];return z;}
int __s(int*t,int k){int p=0,v=0,j=1<<20;for(;j>>=1;)if(p+j<N&&v+t[p+j]<k)v+=t[p+=j];return p+1;}

void doedge(int v,int k){
    __u(ttt,tin[v],k);
    __u(ttt,tout[v]+1,-k);
}

void dfs(int u,int p){
    tin[u]=timer++;
    for(int v,j=h[u];j;j=e[j][1])if((v=e[j][0])!=p&&y[(j+1)/2]){
        dd[v]=dd[pp[v]=u]+1;
        ee[v]=(j+1)/2;
        pp[v]=u;
        jj[v]=(dd[p]-dd[jj[u]]==dd[jj[u]]-dd[jj[jj[u]]])?jj[jj[u]]:u;
        dfs(v,u);
        doedge(v,1);
    }
    tout[u]=timer-1;
}

int qq(int u,int v){
    if(dd[u]>dd[v])return qq(v,u);
    while(dd[v]>dd[u])
        if(dd[jj[v]]>=dd[u]) v=jj[v];
        else v=pp[v];
    while(u-v)
        if(jj[v]-jj[u])u=jj[u],v=jj[v];
        else u=pp[u],v=pp[v];
    return u;
}

int nx(int u,int aa){
    int base=__q(ttt,tin[u]);
    while(dd[u]>dd[aa]&&__q(ttt,tin[pp[u]])==base){
        u=(dd[jj[u]]>dd[aa]&&__q(ttt,tin[jj[u]])==base)?jj[u]:pp[u];
    }
    return u;
}

int need[N],np;

int c1(int i,int j){return ee[i]<ee[j]?-1:ee[i]>ee[j]?1:0;}

int main(){
    scanf("%d%d",&n,&m);
    for(int u,v,i=1;i<=m;++i)scanf("%d%d",&u,&v),_l(u,v),_l(v,u);
    for(int j,i=1;i<n;++i)scanf("%d",&j),y[j]=1;
    pp[1]=jj[1]=1;dfs(1,1);

    int ord = 1;
    for(int j=1;j<=m;++j){
        int u=e[j*2-1][0],v=e[j*2][0];
        if(dd[v]+1==dd[u]){int t=u;u=v;v=t;}
        if(w[j])continue;
        if(!y[j]){
            int lca=qq(u,v);
            for(int ii=nx(u,lca);dd[ii]>dd[lca];ii=nx(ii,lca)) doedge(ii,-1),need[np++]=ii;
            for(int ii=nx(v,lca);dd[ii]>dd[lca];ii=nx(ii,lca)) doedge(ii,-1),need[np++]=ii;
            compar=c1;sort(need,0,np);
            for(int i=0;i<np;++i) w[ee[need[i]]]=ord++;
            np=0;
            w[j]=ord++;
        }else{
            w[j]=ord++;
            doedge(v,-1);
        }
    }
    for(int j=1;j<=m;++j)printf("%d ",w[j]);
}

Compilation message

riggedroads.cpp: In function 'int main()':
riggedroads.cpp:58:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   58 |     scanf("%d%d",&n,&m);
      |     ~~~~~^~~~~~~~~~~~~~
riggedroads.cpp:59:35: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 |     for(int u,v,i=1;i<=m;++i)scanf("%d%d",&u,&v),_l(u,v),_l(v,u);
      |                              ~~~~~^~~~~~~~~~~~~~
riggedroads.cpp:60:32: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   60 |     for(int j,i=1;i<n;++i)scanf("%d",&j),y[j]=1;
      |                           ~~~~~^~~~~~~~~

Subtask #1
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct

Subtask #2
19.0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 2 ms 6492 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 47 ms 12124 KB Output is correct
2 Correct 78 ms 13904 KB Output is correct
3 Correct 83 ms 14932 KB Output is correct
4 Correct 100 ms 17744 KB Output is correct
5 Correct 115 ms 18260 KB Output is correct

Subtask #4
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 2013 ms 18740 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 108 ms 25712 KB Output is correct
2 Correct 127 ms 30804 KB Output is correct
3 Correct 34 ms 15188 KB Output is correct
4 Correct 45 ms 17748 KB Output is correct
5 Correct 130 ms 29248 KB Output is correct

Subtask #6
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 97 ms 21848 KB Output is correct
2 Correct 67 ms 18144 KB Output is correct
3 Correct 143 ms 25552 KB Output is correct
4 Correct 135 ms 23636 KB Output is correct
5 Correct 15 ms 7772 KB Output is correct

Subtask #7
0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 2 ms 6492 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 47 ms 12124 KB Output is correct
10 Correct 78 ms 13904 KB Output is correct
11 Correct 83 ms 14932 KB Output is correct
12 Correct 100 ms 17744 KB Output is correct
13 Correct 115 ms 18260 KB Output is correct
14 Execution timed out 2013 ms 18740 KB Time limit exceeded
15 Halted 0 ms 0 KB -