oj.uz

Submission #259232

# Submission time Handle Problem Language Result Execution time Memory
259232 2020-08-07T12:40:57 Z doowey ICC (CEOI16_icc) C++14
18 / 100
 508 ms 584 KB 
#include <bits/stdc++.h>
#include "icc.h"

using namespace std;

typedef pair<int, int> pii;

#define fi first
#define se second
#define mp make_pair

int ask(vector<int> ta, vector<int> tb){
    int n = ta.size();
    int m = tb.size();
    int f1[n];
    int f2[m];
    for(int i = 0 ; i < n; i ++ )
        f1[i]=ta[i];
    for(int i = 0 ; i < m; i ++ )
        f2[i]=tb[i];
    return query(n, m, f1, f2);
}

const int MAXN = 105;
int par[MAXN];
int sz[MAXN];

int fin(int x){
    if(x==par[x])
        return x;
    return par[x]=fin(par[x]);
}

void unite(int a, int b){
    a=fin(a);
    b=fin(b);
    if(a==b)
        return;
    if(sz[a]>sz[b])swap(a,b);
    par[a]=b;
    sz[b]+=sz[a];
}

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

void run(int N){
    for(int i = 1 ; i <= N ; i ++ )
        par[i]=i,sz[i]=1;
    int i1, i2;
    int qs = 0;
    int xi, yi;
    int sz;
    for(int i = 0 ; i < N - 1; i ++ ){
        vector<vector<int>> G(N + 1);
        for(int j = 1; j <= N; j ++ ){
            G[fin(j)].push_back(j);
        }
        vector<vector<int>> nw;
        for(int j = 1; j <= N; j ++ ){
            if(!G[j].empty())
                nw.push_back(G[j]);
        }
        sz = nw.size();
        for(int k = 0; k < 200; k ++ ){
            xi = (((int)rng() % sz) + sz) % sz;
            yi = (((int)rng() % sz) + sz) % sz;
            swap(nw[xi], nw[yi]);
        }
        vector<pii>ord;
        for(int i = 0 ; i + 1 < nw.size(); i ++ ){
            ord.push_back(mp(min(i + 1, (int)nw.size() - i), i));
        }
        sz = ord.size();
        for(int k = 0 ; k < 200 ; k ++ ){
            xi = (((int)rng() % sz) + sz) % sz;
            yi = (((int)rng() % sz) + sz) % sz;
            swap(ord[xi], ord[yi]);
        }
        int cut = -1;
        qs = 0;
        for(auto p : ord){
            vector<int> s1, s2;
            for(int j = 0 ; j < nw.size(); j ++ ){
                if(j <= p.se){
                    for(auto x : nw[j]) s1.push_back(x);
                }
                else{
                    for(auto x : nw[j]) s2.push_back(x);
                }
            }
            qs ++ ;
            if(ask(s1,s2)){
                cut = p.se;
                break;
            }
        }
        vector<int> lis1, lis2;
        for(int j = 0 ; j < nw.size(); j ++ ){
            if(j <= cut) for(auto x : nw[j]) lis1.push_back(x);
            else for(auto x : nw[j]) lis2.push_back(x);
        }
        int l = 0, r = lis1.size() - 1;
        int mid;
        while(l < r){
            mid = (l + r ) / 2;
            vector<int> fsh;
            for(int j = 0 ; j <= mid; j ++){
                fsh.push_back(lis1[j]);
            }
            if(ask(fsh,lis2))
                r = mid;
            else
                l = mid + 1;
        }
        i1 = lis1[l];
        l = 0, r = lis2.size() - 1;
        while(l < r){
            mid = (l + r) / 2;
            vector<int> fsh;
            for(int j = 0 ; j <= mid ; j ++ ){
                fsh.push_back(lis2[j]);
            }
            if(ask(lis1,fsh)){
                r = mid;
            }
            else{
                l = mid + 1;
            }
        }
        i2 = lis2[l];
        setRoad(i1, i2);
        unite(i1,i2);
    }
}

Compilation message

icc.cpp: In function 'void run(int)':
icc.cpp:70:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i = 0 ; i + 1 < nw.size(); i ++ ){
                         ~~~~~~^~~~~~~~~~~
icc.cpp:83:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(int j = 0 ; j < nw.size(); j ++ ){
                             ~~^~~~~~~~~~~
icc.cpp:98:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j = 0 ; j < nw.size(); j ++ ){
                         ~~^~~~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 512 KB Ok! 139 queries used.
2 Correct 8 ms 512 KB Ok! 117 queries used.

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 77 ms 576 KB Ok! 1031 queries used.
2 Correct 162 ms 512 KB Ok! 1627 queries used.
3 Correct 147 ms 568 KB Ok! 1588 queries used.

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Incorrect 508 ms 584 KB Number of queries more than 4500 out of 2250
2 Halted 0 ms 0 KB -

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Incorrect 419 ms 576 KB Number of queries more than 4000 out of 2000
2 Halted 0 ms 0 KB -

Subtask #5
0 / 29.0

# Verdict Execution time Memory Grader output
1 Incorrect 390 ms 584 KB Number of queries more than 3550 out of 1775
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 375 ms 512 KB Number of queries more than 3250 out of 1625
2 Halted 0 ms 0 KB -