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Submission #12759

# Submission time Handle Problem Language Result Execution time Memory
12759 2015-01-02T16:56:09 Z dohyun0324 전선 연결하기 (GA9_wire) C++
61 / 100
 1000 ms 51872 KB 
#include<stdio.h>
#include<algorithm>
#include<string.h>
using namespace std;
int n;
int p,t=1,a[600010],ch[600010],top,q[2500010],s[600010],e[600010],dap[600010],f,r,treeb[2500010],treef[2500010],tree[2500010];
void update(int x,int gap)
{
    int s=x+t-1;
    tree[s]=gap;
    s/=2;
    while(s>0){
        tree[s]=max(tree[s*2],tree[s*2+1]);
        s/=2;
    }
}
void updatef(int x,int gap)
{
    int s=x+t-1;
    treef[s]=gap;
    s/=2;
    while(s>0){
        treef[s]=min(treef[s*2],treef[s*2+1]);
        s/=2;
    }
}
void updateb(int x,int gap)
{
    int s=x+t-1;
    treeb[s]=gap;
    s/=2;
    while(s>0){
        treeb[s]=max(treeb[s*2],treeb[s*2+1]);
        s/=2;
    }
}
int queryf(int x,int y,int k,int s,int e)
{
    if(s>e) return 2147483647;
    if(s<=x && y<=e) return treef[k];
    if(s>y || e<x) return 2147483647;
    return min(queryf(x,(x+y)/2,k*2,s,e),queryf((x+y)/2+1,y,k*2+1,s,e));
}
int queryb(int x,int y,int k,int s,int e)
{
    if(s>e) return 0;
    if(s<=x && y<=e) return treeb[k];
    if(s>y || e<x) return 0;
    return max(queryb(x,(x+y)/2,k*2,s,e),queryb((x+y)/2+1,y,k*2+1,s,e));
}
int query(int x,int y,int k,int s,int e)
{
    if(s>e) return 0;
    if(s<=x && y<=e) return tree[k];
    if(s>y || e<x) return 0;
    return max(query(x,(x+y)/2,k*2,s,e),query((x+y)/2+1,y,k*2+1,s,e));
}
void check()
{
    int i;
    //1
    for(i=1;i<=n;i++){
        if(dap[i]==1) update(s[i],e[i]);
    }
    for(i=1;i<=n;i++){
        if(dap[i]==1 && query(1,t,1,s[i]+1,e[i]-1)>e[i]){printf("IMPOSSIBLE"); exit(0);}
    }
    memset(tree,0,sizeof tree);
    //0
    for(i=1;i<=n;i++){
        if(dap[i]==0) update(s[i],e[i]);
    }
    for(i=1;i<=n;i++){
        if(dap[i]==0 && query(1,t,1,s[i]+1,e[i]-1)>e[i]){printf("IMPOSSIBLE"); exit(0);}
    }
}
int main()
{
    int i;
    scanf("%d",&n);
    for(i=1;i<=n*2;i++)
    {
        scanf("%d",&a[i]);
        if(s[a[i]]==0) s[a[i]]=i;
        else e[a[i]]=i;
    }
    for(i=1;;i++){if(t>=n*2) break; t*=2;}
    for(i=1;i<=t*2;i++) treef[i]=2147483647;
    for(i=1;i<=n;i++)
    {
        updatef(e[i],s[i]);
        updateb(s[i],e[i]);
    }
    for(i=1;i<=n;i++)
    {
        if(ch[i]==0)
        {
            ch[i]=1;
            dap[i]=1;
            q[++r]=i;
            updatef(e[i],2147483647);
            updateb(s[i],0);
            while(f!=r)
            {
                f++;
                for(;;)
                {
                    p=queryf(1,t,1,s[q[f]]+1,e[q[f]]-1);
                    if(p>=s[q[f]]) break;
                    updatef(e[a[p]],2147483647);
                    dap[a[p]]=(dap[q[f]]+1)%2;
                    ch[a[p]]=1;
                    q[++r]=a[p];
                }
                for(;;)
                {
                    p=queryb(1,t,1,s[q[f]]+1,e[q[f]]-1);
                    if(p<=e[q[f]]) break;
                    updateb(s[a[p]],0);
                    dap[a[p]]=(dap[q[f]]+1)%2;
                    ch[a[p]]=1;
                    q[++r]=a[p];
                }
            }
        }
    }
    check();
    for(i=1;i<=n*2;i++)
    {
        if(dap[a[i]]==0) printf("v");
        else printf("^");
    }
    return 0;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 51872 KB Output is correct
2 Correct 0 ms 51872 KB Output is correct
3 Correct 0 ms 51872 KB Output is correct
4 Correct 0 ms 51872 KB Output is correct
5 Correct 0 ms 51872 KB Output is correct
6 Correct 0 ms 51872 KB Output is correct
7 Correct 0 ms 51872 KB Output is correct
8 Correct 0 ms 51872 KB Output is correct
9 Correct 0 ms 51872 KB Output is correct
10 Correct 0 ms 51872 KB Output is correct
11 Correct 0 ms 51872 KB Output is correct
12 Correct 0 ms 51872 KB Output is correct
13 Correct 4 ms 51872 KB Output is correct
14 Correct 4 ms 51872 KB Output is correct
15 Correct 0 ms 51872 KB Output is correct
16 Correct 4 ms 51872 KB Output is correct
17 Correct 0 ms 51872 KB Output is correct
18 Correct 0 ms 51872 KB Output is correct
19 Correct 0 ms 51872 KB Output is correct
20 Correct 0 ms 51872 KB Output is correct
21 Correct 0 ms 51872 KB Output is correct
22 Correct 0 ms 51872 KB Output is correct
23 Correct 0 ms 51872 KB Output is correct
24 Correct 0 ms 51872 KB Output is correct
25 Correct 0 ms 51872 KB Output is correct
26 Correct 0 ms 51872 KB Output is correct
27 Correct 0 ms 51872 KB Output is correct
28 Correct 0 ms 51872 KB Output is correct
29 Correct 0 ms 51872 KB Output is correct
30 Correct 0 ms 51872 KB Output is correct
31 Correct 0 ms 51872 KB Output is correct
32 Correct 0 ms 51872 KB Output is correct
33 Correct 0 ms 51872 KB Output is correct
34 Correct 0 ms 51872 KB Output is correct
35 Correct 0 ms 51872 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 51872 KB Output is correct
2 Correct 0 ms 51872 KB Output is correct
3 Correct 0 ms 51872 KB Output is correct
4 Correct 0 ms 51872 KB Output is correct
5 Correct 0 ms 51872 KB Output is correct
6 Correct 0 ms 51872 KB Output is correct
7 Correct 0 ms 51872 KB Output is correct
8 Correct 0 ms 51872 KB Output is correct
9 Correct 0 ms 51872 KB Output is correct
10 Correct 0 ms 51872 KB Output is correct
11 Correct 0 ms 51872 KB Output is correct
12 Correct 4 ms 51872 KB Output is correct
13 Correct 0 ms 51872 KB Output is correct
14 Correct 0 ms 51872 KB Output is correct
15 Correct 0 ms 51872 KB Output is correct
16 Correct 4 ms 51872 KB Output is correct
17 Correct 4 ms 51872 KB Output is correct
18 Correct 0 ms 51872 KB Output is correct
19 Correct 0 ms 51872 KB Output is correct
20 Correct 4 ms 51872 KB Output is correct
21 Correct 0 ms 51872 KB Output is correct
22 Correct 4 ms 51872 KB Output is correct

Subtask #3
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 51872 KB Output is correct
2 Correct 28 ms 51872 KB Output is correct
3 Correct 200 ms 51872 KB Output is correct
4 Correct 168 ms 51872 KB Output is correct
5 Correct 136 ms 51872 KB Output is correct
6 Correct 116 ms 51872 KB Output is correct
7 Correct 156 ms 51872 KB Output is correct
8 Correct 12 ms 51872 KB Output is correct
9 Correct 20 ms 51872 KB Output is correct
10 Correct 140 ms 51872 KB Output is correct
11 Correct 104 ms 51872 KB Output is correct
12 Correct 120 ms 51872 KB Output is correct
13 Correct 116 ms 51872 KB Output is correct
14 Correct 148 ms 51872 KB Output is correct
15 Correct 176 ms 51872 KB Output is correct
16 Correct 24 ms 51872 KB Output is correct
17 Correct 28 ms 51872 KB Output is correct
18 Correct 208 ms 51872 KB Output is correct
19 Correct 116 ms 51872 KB Output is correct
20 Correct 196 ms 51872 KB Output is correct
21 Correct 168 ms 51872 KB Output is correct
22 Correct 196 ms 51872 KB Output is correct
23 Correct 220 ms 51872 KB Output is correct
24 Correct 236 ms 51872 KB Output is correct
25 Correct 236 ms 51872 KB Output is correct
26 Correct 176 ms 51872 KB Output is correct
27 Correct 360 ms 51872 KB Output is correct
28 Correct 352 ms 51872 KB Output is correct
29 Correct 300 ms 51872 KB Output is correct
30 Correct 296 ms 51872 KB Output is correct

Subtask #4
0.0 / 39.0

# Verdict Execution time Memory Grader output
1 Correct 324 ms 51872 KB Output is correct
2 Correct 592 ms 51872 KB Output is correct
3 Correct 340 ms 51872 KB Output is correct
4 Correct 556 ms 51872 KB Output is correct
5 Correct 604 ms 51872 KB Output is correct
6 Correct 752 ms 51872 KB Output is correct
7 Correct 920 ms 51872 KB Output is correct
8 Correct 720 ms 51872 KB Output is correct
9 Correct 440 ms 51872 KB Output is correct
10 Correct 364 ms 51872 KB Output is correct
11 Correct 440 ms 51872 KB Output is correct
12 Correct 472 ms 51872 KB Output is correct
13 Correct 892 ms 51872 KB Output is correct
14 Correct 628 ms 51872 KB Output is correct
15 Correct 360 ms 51872 KB Output is correct
16 Correct 392 ms 51872 KB Output is correct
17 Correct 456 ms 51872 KB Output is correct
18 Correct 424 ms 51872 KB Output is correct
19 Correct 640 ms 51872 KB Output is correct
20 Correct 916 ms 51872 KB Output is correct
21 Correct 840 ms 51872 KB Output is correct
22 Execution timed out 1000 ms 51872 KB Program timed out
23 Halted 0 ms 0 KB -