oj.uz

답안 #937237

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
937237 2024-03-03T16:37:43 Z sleepntsheep Rigged Roads (NOI19_riggedroads) C++17
58 / 100
 2000 ms 31172 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=1,y[N],id,pp[N],jj[N],ee[N],dd[N],w[N],tin[N],tout[N],timer=1;
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){if(p<1)p=1; for(;p<N;p+=p&-p)t[p]+=k; }
int __q(int*t,int p){if(p<1)return 0;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]){
        dd[v]=dd[pp[v]=u]+1;
        ee[v]=j>>1;
        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,ord=1;

int c1(int i,int j){return i<j?-1:i>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);

    for(int j=1;j<=m;++j)if(!w[j]){
        int u=e[j*2][0],v=e[j*2+1][0];
        if(dd[v]+1==dd[u]){int t=u;u=v;v=t;}
        if(!y[j]){
            int lca=qq(u,v),aa[]={u,v};
            for(int kk=0;kk<2;++kk){
                int ii=nx(aa[kk],lca);
                while(dd[ii]>dd[lca])
                {
                    doedge(ii,-1),need[np++]=ee[ii];
                    ii=nx(ii,lca);
                }
            }
            compar=c1;sort(need,0,np);
            for(int i=0;i<np;++i) w[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 2 ms 10588 KB Output is correct
2 Correct 1 ms 10588 KB Output is correct
3 Correct 1 ms 10588 KB Output is correct

Subtask #2
19.0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 10588 KB Output is correct
2 Correct 1 ms 10588 KB Output is correct
3 Correct 1 ms 10588 KB Output is correct
4 Correct 3 ms 10588 KB Output is correct
5 Correct 2 ms 10740 KB Output is correct
6 Correct 2 ms 10588 KB Output is correct
7 Correct 2 ms 10584 KB Output is correct
8 Correct 2 ms 10584 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 43 ms 14164 KB Output is correct
2 Correct 72 ms 15528 KB Output is correct
3 Correct 87 ms 17088 KB Output is correct
4 Correct 100 ms 17888 KB Output is correct
5 Correct 135 ms 18504 KB Output is correct

Subtask #4
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 2005 ms 20392 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 122 ms 26216 KB Output is correct
2 Correct 137 ms 31172 KB Output is correct
3 Correct 34 ms 17748 KB Output is correct
4 Correct 44 ms 19792 KB Output is correct
5 Correct 128 ms 29292 KB Output is correct

Subtask #6
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 95 ms 23360 KB Output is correct
2 Correct 51 ms 20308 KB Output is correct
3 Correct 178 ms 25944 KB Output is correct
4 Correct 132 ms 24148 KB Output is correct
5 Correct 15 ms 11100 KB Output is correct

Subtask #7
0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 10588 KB Output is correct
2 Correct 1 ms 10588 KB Output is correct
3 Correct 1 ms 10588 KB Output is correct
4 Correct 3 ms 10588 KB Output is correct
5 Correct 2 ms 10740 KB Output is correct
6 Correct 2 ms 10588 KB Output is correct
7 Correct 2 ms 10584 KB Output is correct
8 Correct 2 ms 10584 KB Output is correct
9 Correct 43 ms 14164 KB Output is correct
10 Correct 72 ms 15528 KB Output is correct
11 Correct 87 ms 17088 KB Output is correct
12 Correct 100 ms 17888 KB Output is correct
13 Correct 135 ms 18504 KB Output is correct
14 Execution timed out 2005 ms 20392 KB Time limit exceeded
15 Halted 0 ms 0 KB -