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Submission #12755

# Submission time Handle Problem Language Result Execution time Memory
12755 2015-01-02T16:50:13 Z tncks0121 전선 연결하기 (GA9_wire) C++14
61 / 100
 624 ms 55776 KB 
#include<stdio.h>
#include<algorithm>
#include<string.h>
using namespace std;
int n;
int p,t=1,a[1200010],ch[1200010],top,q[2000010],s[1200010],e[1200010],dap[1200010],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 55776 KB Output is correct
2 Correct 0 ms 55776 KB Output is correct
3 Correct 0 ms 55776 KB Output is correct
4 Correct 4 ms 55776 KB Output is correct
5 Correct 4 ms 55776 KB Output is correct
6 Correct 4 ms 55776 KB Output is correct
7 Correct 4 ms 55776 KB Output is correct
8 Correct 0 ms 55776 KB Output is correct
9 Correct 0 ms 55776 KB Output is correct
10 Correct 0 ms 55776 KB Output is correct
11 Correct 0 ms 55776 KB Output is correct
12 Correct 0 ms 55776 KB Output is correct
13 Correct 0 ms 55776 KB Output is correct
14 Correct 0 ms 55776 KB Output is correct
15 Correct 0 ms 55776 KB Output is correct
16 Correct 0 ms 55776 KB Output is correct
17 Correct 0 ms 55776 KB Output is correct
18 Correct 0 ms 55776 KB Output is correct
19 Correct 4 ms 55776 KB Output is correct
20 Correct 0 ms 55776 KB Output is correct
21 Correct 0 ms 55776 KB Output is correct
22 Correct 0 ms 55776 KB Output is correct
23 Correct 4 ms 55776 KB Output is correct
24 Correct 0 ms 55776 KB Output is correct
25 Correct 4 ms 55776 KB Output is correct
26 Correct 4 ms 55776 KB Output is correct
27 Correct 0 ms 55776 KB Output is correct
28 Correct 0 ms 55776 KB Output is correct
29 Correct 0 ms 55776 KB Output is correct
30 Correct 0 ms 55776 KB Output is correct
31 Correct 0 ms 55776 KB Output is correct
32 Correct 0 ms 55776 KB Output is correct
33 Correct 0 ms 55776 KB Output is correct
34 Correct 0 ms 55776 KB Output is correct
35 Correct 0 ms 55776 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 55776 KB Output is correct
2 Correct 0 ms 55776 KB Output is correct
3 Correct 0 ms 55776 KB Output is correct
4 Correct 0 ms 55776 KB Output is correct
5 Correct 0 ms 55776 KB Output is correct
6 Correct 0 ms 55776 KB Output is correct
7 Correct 0 ms 55776 KB Output is correct
8 Correct 0 ms 55776 KB Output is correct
9 Correct 4 ms 55776 KB Output is correct
10 Correct 0 ms 55776 KB Output is correct
11 Correct 0 ms 55776 KB Output is correct
12 Correct 0 ms 55776 KB Output is correct
13 Correct 4 ms 55776 KB Output is correct
14 Correct 0 ms 55776 KB Output is correct
15 Correct 0 ms 55776 KB Output is correct
16 Correct 0 ms 55776 KB Output is correct
17 Correct 0 ms 55776 KB Output is correct
18 Correct 0 ms 55776 KB Output is correct
19 Correct 0 ms 55776 KB Output is correct
20 Correct 0 ms 55776 KB Output is correct
21 Correct 0 ms 55776 KB Output is correct
22 Correct 0 ms 55776 KB Output is correct

Subtask #3
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 55776 KB Output is correct
2 Correct 28 ms 55776 KB Output is correct
3 Correct 200 ms 55776 KB Output is correct
4 Correct 160 ms 55776 KB Output is correct
5 Correct 144 ms 55776 KB Output is correct
6 Correct 120 ms 55776 KB Output is correct
7 Correct 160 ms 55776 KB Output is correct
8 Correct 4 ms 55776 KB Output is correct
9 Correct 20 ms 55776 KB Output is correct
10 Correct 156 ms 55776 KB Output is correct
11 Correct 104 ms 55776 KB Output is correct
12 Correct 136 ms 55776 KB Output is correct
13 Correct 108 ms 55776 KB Output is correct
14 Correct 136 ms 55776 KB Output is correct
15 Correct 172 ms 55776 KB Output is correct
16 Correct 28 ms 55776 KB Output is correct
17 Correct 36 ms 55776 KB Output is correct
18 Correct 204 ms 55776 KB Output is correct
19 Correct 124 ms 55776 KB Output is correct
20 Correct 192 ms 55776 KB Output is correct
21 Correct 180 ms 55776 KB Output is correct
22 Correct 204 ms 55776 KB Output is correct
23 Correct 216 ms 55776 KB Output is correct
24 Correct 232 ms 55776 KB Output is correct
25 Correct 264 ms 55776 KB Output is correct
26 Correct 176 ms 55776 KB Output is correct
27 Correct 356 ms 55776 KB Output is correct
28 Correct 356 ms 55776 KB Output is correct
29 Correct 304 ms 55776 KB Output is correct
30 Correct 304 ms 55776 KB Output is correct

Subtask #4
0.0 / 39.0

# Verdict Execution time Memory Grader output
1 Correct 316 ms 55776 KB Output is correct
2 Correct 592 ms 55776 KB Output is correct
3 Correct 336 ms 55776 KB Output is correct
4 Correct 568 ms 55776 KB Output is correct
5 Correct 624 ms 55776 KB Output is correct
6 Runtime error 220 ms 55772 KB Program hung waiting for input
7 Halted 0 ms 0 KB -