Submission #529756

#	Time	Username	Problem	Language	Result	Execution time	Memory
529756		Koosha_mv	Meetings (JOI19_meetings)	C++14	0 / 100	69 ms	584 KiB

meetings

#include <bits/stdc++.h>
using namespace std;
#define dbgv(v) cout<<#v<<" = "; f(i,0,v.size()) cout<<v[i]<<" "; cout<<endl
#define dbga(a,x,y) cout<<#a<<" = "; f(i,x,y) cout<<a[i]<<" "; cout<<endl
#define erorp(x) cout<<#x<<"={"<<(x.F)<<" , "<<x.S<<"}"<<endl
#define eror(x) cout<<#x<<'='<<(x)<<endl
#define f_(i,a,b) for(int i=a;i>=b;i--)
#define f(i,a,b) for(int i=a;i<b;i++)
#define nb(x) __builtin_popcount(x)
#define all(v) v.begin(),v.end()
#define bit(n,k) (((n)>>(k))&1)
#define Add(x,y) x=(x+y)%mod
#define maxm(a,b) a=max(a,b)
#define minm(a,b) a=min(a,b)
#define lst(x) x[x.size()-1]
#define sz(x) int(x.size())
#define mp make_pair
#define ll long long
#define pb push_back
#define S second
#define F first
#include "meetings.h"

const int N=2020;

int n;
vector<int> g[N];
/*
void Bridge(int u, int v){
	cout<<"BRIDGE "<<u<<" "<<v<<endl;
}
int Query(int u, int v, int w){
	int x;
	cout<<"QUERY "<<u<<" "<<v<<" "<<w<<endl;	
	cin>>x;
	return x;
}*/
void findpath(vector<int> p){
	vector<int> res;
	if(p.size()<2) assert(0);
	res.pb(p[0]);
	res.pb(p[1]);
	f(i,2,p.size()){
		int u=p[i];
		int l,r;
		if(Query(u,res[0],res[1])==res[0]){
			l=-1,r=0;
		}
		else{
			int l=0,r=res.size();
			while(l+1<r){
				int mid=(l+r)>>1;
				if(Query(u,res[mid],res[mid-1])==res[mid]) l=mid;
				else r=mid;
			}
		}
		vector<int> pes;
		f(i,0,res.size()){
			if(i==r) pes.pb(u);
			pes.pb(res[i]);
		}
		if(r==res.size()) pes.pb(u);
		res=pes;
	}
	f(i,1,res.size()){
		Bridge(min(res[i],res[i-1]),max(res[i],res[i-1]));
	}
}
void solve(vector<int> vec){
	if(vec.size()==1) return ;
	vector<int> path;
	vector<pair<int,int>> e;
	int u=0,v=0;
	while(u==v) u=rand()%vec.size(),v=rand()%vec.size();
	u=vec[u],v=vec[v];
	e.pb({u,u});
	e.pb({v,v});
	for(auto x : vec){
		if(x==u || x==v) continue ;
		e.pb({Query(x,u,v),x});
	}	
	sort(all(e));
	vec.clear();
	f(i,0,e.size()){
		vec.pb(e[i].S);
		if(i==e.size()-1 || e[i].F!=e[i+1].F){
			path.pb(e[i].F);
			solve(vec);
			vec.clear();
		}
	}
	findpath(path);
}
void Solve(int pn){
	n=pn;
	vector<int> vec(n);
	iota(all(vec),0);
	solve(vec);
}
/*
int main(){
	srand(time(NULL));
	cin>>n;
	f(i,1,n){
		int u,v;
		cin>>u>>v;
		g[u].pb(v);
		g[v].pb(u);
	}
	Solve(n);
}
*/

Compilation message (stderr)

meetings.cpp: In function 'void findpath(std::vector<int>)':
meetings.cpp:8:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 | #define f(i,a,b) for(int i=a;i<b;i++)
......
   43 |  f(i,2,p.size()){
      |    ~~~~~~~~~~~~                
meetings.cpp:43:2: note: in expansion of macro 'f'
   43 |  f(i,2,p.size()){
      |  ^
meetings.cpp:8:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 | #define f(i,a,b) for(int i=a;i<b;i++)
......
   58 |   f(i,0,res.size()){
      |     ~~~~~~~~~~~~~~             
meetings.cpp:58:3: note: in expansion of macro 'f'
   58 |   f(i,0,res.size()){
      |   ^
meetings.cpp:62:7: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |   if(r==res.size()) pes.pb(u);
      |      ~^~~~~~~~~~~~
meetings.cpp:45:7: warning: variable 'l' set but not used [-Wunused-but-set-variable]
   45 |   int l,r;
      |       ^
meetings.cpp:8:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 | #define f(i,a,b) for(int i=a;i<b;i++)
......
   65 |  f(i,1,res.size()){
      |    ~~~~~~~~~~~~~~              
meetings.cpp:65:2: note: in expansion of macro 'f'
   65 |  f(i,1,res.size()){
      |  ^
meetings.cpp: In function 'void solve(std::vector<int>)':
meetings.cpp:8:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 | #define f(i,a,b) for(int i=a;i<b;i++)
......
   84 |  f(i,0,e.size()){
      |    ~~~~~~~~~~~~                
meetings.cpp:84:2: note: in expansion of macro 'f'
   84 |  f(i,0,e.size()){
      |  ^
meetings.cpp:86:7: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   86 |   if(i==e.size()-1 || e[i].F!=e[i+1].F){
      |      ~^~~~~~~~~~~~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 10
• Subtask 3: 0 / 12
• Subtask 4: 0 / 71