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Submission #12765

# Submission time Handle Problem Language Result Execution time Memory
12765 2015-01-03T01:43:31 Z dohyun0324 전선 연결하기 (GA9_wire) C++
61 / 100
 1000 ms 51872 KB 
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<algorithm>
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)
        {
            if(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)
        {
            if(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);
                    updateb(s[a[p]],0);
                    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);
                    updatef(e[a[p]],2147483647);
                    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 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 0 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 4 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 4 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 0 ms 51872 KB Output is correct
15 Correct 4 ms 51872 KB Output is correct
16 Correct 0 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 4 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

Subtask #3
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 51872 KB Output is correct
2 Correct 20 ms 51872 KB Output is correct
3 Correct 108 ms 51872 KB Output is correct
4 Correct 140 ms 51872 KB Output is correct
5 Correct 120 ms 51872 KB Output is correct
6 Correct 104 ms 51872 KB Output is correct
7 Correct 140 ms 51872 KB Output is correct
8 Correct 4 ms 51872 KB Output is correct
9 Correct 20 ms 51872 KB Output is correct
10 Correct 104 ms 51872 KB Output is correct
11 Correct 100 ms 51872 KB Output is correct
12 Correct 108 ms 51872 KB Output is correct
13 Correct 104 ms 51872 KB Output is correct
14 Correct 124 ms 51872 KB Output is correct
15 Correct 148 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 124 ms 51872 KB Output is correct
19 Correct 96 ms 51872 KB Output is correct
20 Correct 176 ms 51872 KB Output is correct
21 Correct 152 ms 51872 KB Output is correct
22 Correct 152 ms 51872 KB Output is correct
23 Correct 196 ms 51872 KB Output is correct
24 Correct 212 ms 51872 KB Output is correct
25 Correct 200 ms 51872 KB Output is correct
26 Correct 164 ms 51872 KB Output is correct
27 Correct 296 ms 51872 KB Output is correct
28 Correct 296 ms 51872 KB Output is correct
29 Correct 304 ms 51872 KB Output is correct
30 Correct 304 ms 51872 KB Output is correct

Subtask #4
0.0 / 39.0

# Verdict Execution time Memory Grader output
1 Correct 280 ms 51872 KB Output is correct
2 Correct 516 ms 51872 KB Output is correct
3 Correct 316 ms 51872 KB Output is correct
4 Correct 488 ms 51872 KB Output is correct
5 Correct 544 ms 51872 KB Output is correct
6 Correct 684 ms 51872 KB Output is correct
7 Correct 800 ms 51872 KB Output is correct
8 Correct 604 ms 51872 KB Output is correct
9 Correct 384 ms 51872 KB Output is correct
10 Correct 332 ms 51872 KB Output is correct
11 Correct 432 ms 51872 KB Output is correct
12 Correct 408 ms 51872 KB Output is correct
13 Correct 788 ms 51872 KB Output is correct
14 Correct 632 ms 51872 KB Output is correct
15 Correct 344 ms 51872 KB Output is correct
16 Correct 356 ms 51872 KB Output is correct
17 Correct 400 ms 51872 KB Output is correct
18 Correct 368 ms 51872 KB Output is correct
19 Correct 564 ms 51872 KB Output is correct
20 Correct 812 ms 51872 KB Output is correct
21 Correct 772 ms 51872 KB Output is correct
22 Execution timed out 1000 ms 51872 KB Program timed out
23 Halted 0 ms 0 KB -