oj.uz

Submission #278241

# Submission time Handle Problem Language Result Execution time Memory
278241 2020-08-21T11:25:08 Z Revo7 Xylophone (JOI18_xylophone) C++14
100 / 100
 71 ms 520 KB 
#include "xylophone.h"
#include <bits/stdc++.h>

using namespace std;
static int a[5100];
int n;
int bs(){
    int l=1,r=n,ret;
    while(l<=r){
        int mid=(l+r)/2;
        if(query(mid,n)==n-1){
            ret=mid;
            l=mid+1;
        }
        else r=mid-1;
    }
    return ret;
}
bool vis[5100];

bool av(int x){
    if(x>=1&&x<=n)return 1-vis[x];
    return 0;
}
void solve(int N) {
    n=N;
	int on=bs();
    //cout<<on<<endl;
    a[on]=1;
    vis[1]=1;
    a[on+1]=1+query(on,on+1);
    vis[a[on+1]]=1;
    for(int i=on;i+2<=n;i++){
        int d12=query(i+1,i+2);
        int d01=a[i+1]-a[i];
        d01=max(d01,-d01);
        if(!av(a[i+1]+d12)||!av(a[i+1]-d12)){
            if(!av(a[i+1]+d12)){
                a[i+2]=a[i+1]-d12;
                vis[a[i+2]]=1;
            }
            else{
                a[i+2]=a[i+1]+d12;
                vis[a[i+2]]=1;
            }
            continue;
        }

        int d03=query(i,i+2);
        if(d03==d01+d12){
            if(a[i+1]>a[i])a[i+2]=a[i+1]+d12;
            else a[i+2]=a[i+1]-d12;
            vis[a[i+2]]=1;
        }
        else{
            if(a[i+1]>a[i])a[i+2]=a[i+1]-d12;
            else a[i+2]=a[i+1]+d12;
            vis[a[i+2]]=1;
        }
    }

    if(on-1>=1){
        a[on-1]=a[on]+query(on-1,on);
        vis[a[on-1]]=1;
    }

    for(int i=on;i-2>=1;i--){
        int d21=query(i-2,i-1);
        if(!av(a[i-1]+d21)||!av(a[i-1]-d21)){
            if(!av(a[i-1]+d21)){
                a[i-2]=a[i-1]-d21;
            }
            else{
                a[i-2]=a[i-1]+d21;
            }
            vis[a[i-2]]=1;
            continue;
        }
        int d10=a[i-1]-a[i];
        d10=max(d10,-d10);
        int d20=query(i-2,i);
        if(d20==d21+d10){
            if(a[i-1]>a[i])a[i-2]=a[i-1]+d21;
            else a[i-2]=a[i-1]-d21;
        }
        else{
            if(a[i-1]>a[i])a[i-2]=a[i-1]-d21;
            else a[i-2]=a[i-1]+d21;
        }
        vis[a[i-2]]=1;
    }

    for(int i=1;i<=n;i++){
        answer(i,a[i]);
    }
}

Compilation message

xylophone.cpp: In function 'int bs()':
xylophone.cpp:17:12: warning: 'ret' may be used uninitialized in this function [-Wmaybe-uninitialized]
   17 |     return ret;
      |            ^~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 1 ms 256 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 1 ms 256 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 256 KB Output is correct
13 Correct 2 ms 256 KB Output is correct
14 Correct 2 ms 384 KB Output is correct
15 Correct 2 ms 288 KB Output is correct

Subtask #2
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 1 ms 256 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 1 ms 256 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 256 KB Output is correct
13 Correct 2 ms 256 KB Output is correct
14 Correct 2 ms 384 KB Output is correct
15 Correct 2 ms 288 KB Output is correct
16 Correct 3 ms 416 KB Output is correct
17 Correct 6 ms 256 KB Output is correct
18 Correct 12 ms 256 KB Output is correct
19 Correct 11 ms 384 KB Output is correct
20 Correct 12 ms 376 KB Output is correct
21 Correct 11 ms 384 KB Output is correct
22 Correct 11 ms 384 KB Output is correct
23 Correct 9 ms 384 KB Output is correct
24 Correct 10 ms 384 KB Output is correct
25 Correct 12 ms 384 KB Output is correct
26 Correct 8 ms 384 KB Output is correct
27 Correct 13 ms 384 KB Output is correct
28 Correct 14 ms 384 KB Output is correct
29 Correct 11 ms 256 KB Output is correct
30 Correct 14 ms 384 KB Output is correct

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 1 ms 256 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 1 ms 256 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 256 KB Output is correct
13 Correct 2 ms 256 KB Output is correct
14 Correct 2 ms 384 KB Output is correct
15 Correct 2 ms 288 KB Output is correct
16 Correct 3 ms 416 KB Output is correct
17 Correct 6 ms 256 KB Output is correct
18 Correct 12 ms 256 KB Output is correct
19 Correct 11 ms 384 KB Output is correct
20 Correct 12 ms 376 KB Output is correct
21 Correct 11 ms 384 KB Output is correct
22 Correct 11 ms 384 KB Output is correct
23 Correct 9 ms 384 KB Output is correct
24 Correct 10 ms 384 KB Output is correct
25 Correct 12 ms 384 KB Output is correct
26 Correct 8 ms 384 KB Output is correct
27 Correct 13 ms 384 KB Output is correct
28 Correct 14 ms 384 KB Output is correct
29 Correct 11 ms 256 KB Output is correct
30 Correct 14 ms 384 KB Output is correct
31 Correct 31 ms 384 KB Output is correct
32 Correct 36 ms 384 KB Output is correct
33 Correct 31 ms 376 KB Output is correct
34 Correct 54 ms 384 KB Output is correct
35 Correct 61 ms 384 KB Output is correct
36 Correct 47 ms 376 KB Output is correct
37 Correct 36 ms 436 KB Output is correct
38 Correct 48 ms 384 KB Output is correct
39 Correct 35 ms 512 KB Output is correct
40 Correct 57 ms 384 KB Output is correct
41 Correct 56 ms 384 KB Output is correct
42 Correct 51 ms 376 KB Output is correct
43 Correct 42 ms 384 KB Output is correct
44 Correct 46 ms 376 KB Output is correct
45 Correct 51 ms 384 KB Output is correct
46 Correct 61 ms 376 KB Output is correct
47 Correct 57 ms 504 KB Output is correct
48 Correct 70 ms 520 KB Output is correct
49 Correct 64 ms 384 KB Output is correct
50 Correct 47 ms 520 KB Output is correct
51 Correct 61 ms 388 KB Output is correct
52 Correct 52 ms 384 KB Output is correct
53 Correct 57 ms 384 KB Output is correct
54 Correct 59 ms 504 KB Output is correct
55 Correct 67 ms 504 KB Output is correct
56 Correct 71 ms 392 KB Output is correct
57 Correct 65 ms 388 KB Output is correct
58 Correct 66 ms 384 KB Output is correct
59 Correct 60 ms 516 KB Output is correct
60 Correct 41 ms 376 KB Output is correct