Submission #923633

#	Time	Username	Problem	Language	Result	Execution time	Memory
923633		alexander707070	Chameleon's Love (JOI20_chameleon)	C++14	4 / 100	37 ms	596 KiB

chameleon

#include <bits/stdc++.h>
#include "chameleon.h"
#define MAXN 1007
 
using namespace std;
 
namespace {
 
int n,bad[MAXN];
vector<int> to[MAXN];
vector< pair<int,int> > sol;
 
vector<int> l,r,w;
 
void bin(){

    for(int curr:l){
        
        int lt=0,rt=n+1,mid,st=0;
        while(lt+1<rt){
            mid=(lt+rt)/2;
            
            w.clear();
            for(int f=st;f<mid;f++)w.push_back(r[f]);
            w.push_back(curr);
            
            if(Query(w)!=w.size()){
                rt=mid;
            }else{
                lt=mid;
            }
        }
        
        if(rt!=n+1)to[curr].push_back(r[rt-1]);

        
        lt=st=rt; rt=n+1;
        while(lt+1<rt){
            mid=(lt+rt)/2;
            
            w.clear();
            for(int f=st;f<mid;f++)w.push_back(r[f]);
            w.push_back(curr);
            
            if(Query(w)!=w.size()){
                rt=mid;
            }else{
                lt=mid;
            }
        }
        
        if(rt!=n+1)to[curr].push_back(r[rt-1]);
        
        lt=st=rt; rt=n+1;
        while(lt+1<rt){
            mid=(lt+rt)/2;
            
            w.clear();
            for(int f=st;f<mid;f++)w.push_back(r[f]);
            w.push_back(curr);
            
            if(Query(w)!=w.size()){
                rt=mid;
            }else{
                lt=mid;
            }
        }
        
        if(rt!=n+1)to[curr].push_back(r[rt-1]);
    }
    
    for(int curr:r){
        int lt=0,rt=n+1,mid,st=0;

        while(lt+1<rt){
            mid=(lt+rt)/2;
            
            w.clear();
            for(int f=st;f<mid;f++)w.push_back(l[f]);
            w.push_back(curr);
            
            if(Query(w)!=w.size()){
                rt=mid;
            }else{
                lt=mid;
            }
        }
        
        if(rt!=n+1)to[curr].push_back(l[rt-1]);
        
        lt=st=rt; rt=n+1;
        while(lt+1<rt){
            mid=(lt+rt)/2;
            
            w.clear();
            for(int f=st;f<mid;f++)w.push_back(l[f]);
            w.push_back(curr);
            
            if(Query(w)!=w.size()){
                rt=mid;
            }else{
                lt=mid;
            }
        }
        
        if(rt!=n+1)to[curr].push_back(l[rt-1]);
        
        lt=st=rt; rt=n+1;
        while(lt+1<rt){
            mid=(lt+rt)/2;
            
            w.clear();
            for(int f=st;f<mid;f++)w.push_back(l[f]);
            w.push_back(curr);
            
            if(Query(w)!=w.size()){
                rt=mid;
            }else{
                lt=mid;
            }
        }
        
        if(rt!=n+1)to[curr].push_back(l[rt-1]);

    }
}
 
}  // namespace
 
void Solve(int N) {
    n=N;
    for(int i=1;i<=2*n;i++){
        l.push_back(i);
        if(Query(l)!=l.size()){
            l.pop_back();
            r.push_back(i);
        }
    }
    
    bin();
    
    for(int i=1;i<=2*n;i++){
        if(to[i].size()==1)continue;
        else{
            if(Query({i,to[i][0],to[i][1]})==1)bad[i]=to[i][2];
            else if(Query({i,to[i][0],to[i][2]})==1)bad[i]=to[i][1];
            else if(Query({i,to[i][2],to[i][1]})==1)bad[i]=to[i][0];
        }
    }
    
    for(int i=1;i<=2*n;i++){
        for(int f:to[i]){
            if(bad[i]==f or bad[f]==i)continue;
            if(i<f)Answer(i,f);
        }
    }
}

/*

4
1 0 1 0 0 1 1 0
4 4 1 2 1 2 3 3
4 3 8 7 6 5 2 1
*/

Compilation message (stderr)

chameleon.cpp: In function 'void {anonymous}::bin()':
chameleon.cpp:27:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |             if(Query(w)!=w.size()){
      |                ~~~~~~~~^~~~~~~~~~
chameleon.cpp:45:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |             if(Query(w)!=w.size()){
      |                ~~~~~~~~^~~~~~~~~~
chameleon.cpp:62:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |             if(Query(w)!=w.size()){
      |                ~~~~~~~~^~~~~~~~~~
chameleon.cpp:82:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   82 |             if(Query(w)!=w.size()){
      |                ~~~~~~~~^~~~~~~~~~
chameleon.cpp:99:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   99 |             if(Query(w)!=w.size()){
      |                ~~~~~~~~^~~~~~~~~~
chameleon.cpp:116:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  116 |             if(Query(w)!=w.size()){
      |                ~~~~~~~~^~~~~~~~~~
chameleon.cpp: In function 'void Solve(int)':
chameleon.cpp:134:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  134 |         if(Query(l)!=l.size()){
      |            ~~~~~~~~^~~~~~~~~~

• Subtask 1: 4 / 4
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 36