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Submission #12754

# Submission time Handle Problem Language Result Execution time Memory
12754 2015-01-02T16:48:44 Z dohyun0324 전선 연결하기 (GA9_wire) C++
61 / 100
 592 ms 44060 KB 
#include<stdio.h>
#include<algorithm>
#include<string.h>
using namespace std;
int n;
int p,t=1,a[600010],ch[600010],top,q[2000010],s[600010],e[600010],dap[600010],f,r,treeb[2000010],treef[2000010],tree[2000010];
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++;
                while(queryf(1,t,1,s[q[f]]+1,e[q[f]]-1)<s[q[f]])
                {
                    p=queryf(1,t,1,s[q[f]]+1,e[q[f]]-1);
                    updatef(e[a[p]],2147483647);
                    dap[a[p]]=(dap[q[f]]+1)%2;
                    ch[a[p]]=1;
                    q[++r]=a[p];
                }
                while(queryb(1,t,1,s[q[f]]+1,e[q[f]]-1)>e[q[f]])
                {
                    p=queryb(1,t,1,s[q[f]]+1,e[q[f]]-1);
                    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 44060 KB Output is correct
2 Correct 0 ms 44060 KB Output is correct
3 Correct 0 ms 44060 KB Output is correct
4 Correct 0 ms 44060 KB Output is correct
5 Correct 0 ms 44060 KB Output is correct
6 Correct 0 ms 44060 KB Output is correct
7 Correct 4 ms 44060 KB Output is correct
8 Correct 0 ms 44060 KB Output is correct
9 Correct 0 ms 44060 KB Output is correct
10 Correct 0 ms 44060 KB Output is correct
11 Correct 0 ms 44060 KB Output is correct
12 Correct 0 ms 44060 KB Output is correct
13 Correct 0 ms 44060 KB Output is correct
14 Correct 0 ms 44060 KB Output is correct
15 Correct 0 ms 44060 KB Output is correct
16 Correct 0 ms 44060 KB Output is correct
17 Correct 0 ms 44060 KB Output is correct
18 Correct 0 ms 44060 KB Output is correct
19 Correct 0 ms 44060 KB Output is correct
20 Correct 0 ms 44060 KB Output is correct
21 Correct 0 ms 44060 KB Output is correct
22 Correct 0 ms 44060 KB Output is correct
23 Correct 0 ms 44060 KB Output is correct
24 Correct 0 ms 44060 KB Output is correct
25 Correct 0 ms 44060 KB Output is correct
26 Correct 0 ms 44060 KB Output is correct
27 Correct 0 ms 44060 KB Output is correct
28 Correct 0 ms 44060 KB Output is correct
29 Correct 0 ms 44060 KB Output is correct
30 Correct 4 ms 44060 KB Output is correct
31 Correct 0 ms 44060 KB Output is correct
32 Correct 0 ms 44060 KB Output is correct
33 Correct 0 ms 44060 KB Output is correct
34 Correct 4 ms 44060 KB Output is correct
35 Correct 0 ms 44060 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 44060 KB Output is correct
2 Correct 0 ms 44060 KB Output is correct
3 Correct 0 ms 44060 KB Output is correct
4 Correct 0 ms 44060 KB Output is correct
5 Correct 0 ms 44060 KB Output is correct
6 Correct 0 ms 44060 KB Output is correct
7 Correct 4 ms 44060 KB Output is correct
8 Correct 0 ms 44060 KB Output is correct
9 Correct 0 ms 44060 KB Output is correct
10 Correct 4 ms 44060 KB Output is correct
11 Correct 0 ms 44060 KB Output is correct
12 Correct 0 ms 44060 KB Output is correct
13 Correct 0 ms 44060 KB Output is correct
14 Correct 0 ms 44060 KB Output is correct
15 Correct 0 ms 44060 KB Output is correct
16 Correct 4 ms 44060 KB Output is correct
17 Correct 0 ms 44060 KB Output is correct
18 Correct 0 ms 44060 KB Output is correct
19 Correct 0 ms 44060 KB Output is correct
20 Correct 4 ms 44060 KB Output is correct
21 Correct 0 ms 44060 KB Output is correct
22 Correct 4 ms 44060 KB Output is correct

Subtask #3
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 44060 KB Output is correct
2 Correct 20 ms 44060 KB Output is correct
3 Correct 200 ms 44060 KB Output is correct
4 Correct 156 ms 44060 KB Output is correct
5 Correct 140 ms 44060 KB Output is correct
6 Correct 112 ms 44060 KB Output is correct
7 Correct 148 ms 44060 KB Output is correct
8 Correct 12 ms 44060 KB Output is correct
9 Correct 28 ms 44060 KB Output is correct
10 Correct 148 ms 44060 KB Output is correct
11 Correct 116 ms 44060 KB Output is correct
12 Correct 128 ms 44060 KB Output is correct
13 Correct 108 ms 44060 KB Output is correct
14 Correct 144 ms 44060 KB Output is correct
15 Correct 172 ms 44060 KB Output is correct
16 Correct 24 ms 44060 KB Output is correct
17 Correct 32 ms 44060 KB Output is correct
18 Correct 188 ms 44060 KB Output is correct
19 Correct 120 ms 44060 KB Output is correct
20 Correct 196 ms 44060 KB Output is correct
21 Correct 172 ms 44060 KB Output is correct
22 Correct 204 ms 44060 KB Output is correct
23 Correct 212 ms 44060 KB Output is correct
24 Correct 232 ms 44060 KB Output is correct
25 Correct 244 ms 44060 KB Output is correct
26 Correct 168 ms 44060 KB Output is correct
27 Correct 348 ms 44060 KB Output is correct
28 Correct 340 ms 44060 KB Output is correct
29 Correct 296 ms 44060 KB Output is correct
30 Correct 296 ms 44060 KB Output is correct

Subtask #4
0.0 / 39.0

# Verdict Execution time Memory Grader output
1 Correct 312 ms 44060 KB Output is correct
2 Correct 592 ms 44060 KB Output is correct
3 Correct 316 ms 44060 KB Output is correct
4 Correct 536 ms 44060 KB Output is correct
5 Correct 588 ms 44060 KB Output is correct
6 Runtime error 204 ms 44056 KB Program hung waiting for input
7 Halted 0 ms 0 KB -