oj.uz

Submission #172300

# Submission time Handle Problem Language Result Execution time Memory
172300 2020-01-01T04:35:42 Z arnold518 Library (JOI18_library) C++14
100 / 100
 535 ms 4600 KB 
#include "library.h"
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 1000;

int N;

int memo[MAXN+10][MAXN+10];
vector<int> adj[MAXN+10];
bool vis[MAXN+10];
vector<int> ans;

int query(int l, int r)
{
    int i, j;

    if(l==r) memo[l][r]=1;
    else if(memo[l][r]==-1)
    {
        vector<int> t;
        t.resize(N);
        for(i=l; i<=r; i++) t[i-1]=1;
        memo[l][r]=Query(t);
    }
    return memo[l][r];
}

void Solve(int _N)
{
    int i, j;
    N=_N;
    memset(memo, -1, sizeof(memo));

    if(N==1)
    {
        Answer(vector<int>(1, 1));
        return;
    }

    for(i=2; i<=N; i++)
    {
        int lo, hi;

        if(query(1, i-1)+1-query(1, i)==0) continue;

        lo=1, hi=i;
        while(lo+1<hi)
        {
            int mid=lo+hi>>1, t;
            if(mid==0) t=2;
            else t=query(mid, i-1)+1-query(mid, i);

            if(t<=0) hi=mid;
            else lo=mid;
        }
        if(lo) adj[i].push_back(lo), adj[lo].push_back(i);

        if(query(1, i-1)+1-query(1, i)==1) continue;

        lo=1, hi=i;
        while(lo+1<hi)
        {
            int mid=lo+hi>>1, t;
            if(mid==0) t=2;
            else t=query(mid, i-1)+1-query(mid, i);

            if(t<=1) hi=mid;
            else lo=mid;
        }
        if(lo) adj[i].push_back(lo), adj[lo].push_back(i);
    }

    int now=0;
    for(i=1; i<=N; i++) if(adj[i].size()==1) break;
    now=i;

    while(1)
    {
        ans.push_back(now); vis[now]=1;
        int cnt=0;
        for(int nxt : adj[now])
        {
            if(vis[nxt]) continue;
            now=nxt; cnt++;
        }
        if(!cnt) break;
    }
    Answer(ans);
}

Compilation message

library.cpp: In function 'int query(int, int)':
library.cpp:20:12: warning: unused variable 'j' [-Wunused-variable]
     int i, j;
            ^
library.cpp: In function 'void Solve(int)':
library.cpp:54:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
             int mid=lo+hi>>1, t;
                     ~~^~~
library.cpp:68:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
             int mid=lo+hi>>1, t;
                     ~~^~~
library.cpp:35:12: warning: unused variable 'j' [-Wunused-variable]
     int i, j;
            ^

Subtask #1
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 4328 KB # of queries: 2380
2 Correct 44 ms 4344 KB # of queries: 2447
3 Correct 52 ms 4344 KB # of queries: 2508
4 Correct 52 ms 4424 KB # of queries: 2540
5 Correct 35 ms 4356 KB # of queries: 2533
6 Correct 35 ms 4416 KB # of queries: 2528
7 Correct 40 ms 4392 KB # of queries: 2545
8 Correct 42 ms 4412 KB # of queries: 2387
9 Correct 35 ms 4332 KB # of queries: 2500
10 Correct 30 ms 4344 KB # of queries: 1481
11 Correct 5 ms 4216 KB # of queries: 0
12 Correct 5 ms 4344 KB # of queries: 1
13 Correct 5 ms 4220 KB # of queries: 3
14 Correct 5 ms 4320 KB # of queries: 6
15 Correct 6 ms 4216 KB # of queries: 76
16 Correct 7 ms 4344 KB # of queries: 172

Subtask #2
81.0 / 81.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 4328 KB # of queries: 2380
2 Correct 44 ms 4344 KB # of queries: 2447
3 Correct 52 ms 4344 KB # of queries: 2508
4 Correct 52 ms 4424 KB # of queries: 2540
5 Correct 35 ms 4356 KB # of queries: 2533
6 Correct 35 ms 4416 KB # of queries: 2528
7 Correct 40 ms 4392 KB # of queries: 2545
8 Correct 42 ms 4412 KB # of queries: 2387
9 Correct 35 ms 4332 KB # of queries: 2500
10 Correct 30 ms 4344 KB # of queries: 1481
11 Correct 5 ms 4216 KB # of queries: 0
12 Correct 5 ms 4344 KB # of queries: 1
13 Correct 5 ms 4220 KB # of queries: 3
14 Correct 5 ms 4320 KB # of queries: 6
15 Correct 6 ms 4216 KB # of queries: 76
16 Correct 7 ms 4344 KB # of queries: 172
17 Correct 535 ms 4484 KB # of queries: 17598
18 Correct 502 ms 4600 KB # of queries: 17260
19 Correct 529 ms 4480 KB # of queries: 17436
20 Correct 417 ms 4340 KB # of queries: 16139
21 Correct 421 ms 4520 KB # of queries: 15248
22 Correct 468 ms 4592 KB # of queries: 17383
23 Correct 521 ms 4476 KB # of queries: 17489
24 Correct 177 ms 4448 KB # of queries: 7910
25 Correct 464 ms 4592 KB # of queries: 17058
26 Correct 424 ms 4344 KB # of queries: 15822
27 Correct 178 ms 4392 KB # of queries: 7913
28 Correct 450 ms 4468 KB # of queries: 15454
29 Correct 460 ms 4472 KB # of queries: 15436
30 Correct 419 ms 4420 KB # of queries: 15454