/*
"care a facut teste cu Lattice reduction attack e ciudat"
"linistiti va putin"
- 2023 -
*/
#include<bits/stdc++.h>
#include "icc.h"
#define debug(x) cerr << #x << " " << x << "\n"
#define debugs(x) cerr << #x << " " << x << " "
#pragma GCC optimize("Ofast")
using namespace std;
int n;
int root[101];
int sz[101];
int comp[101][101];
bool connected[101][101];
int aquery[101];
int aqsz;
int bquery[101];
int bqsz;
int c[101];
int d[101];
bool seen[101];
void unite(int a, int b)
{
a=root[a];
b=root[b];
if(sz[a]<sz[b])
{
swap(a,b);
}
int i;
for (i=1; i<=sz[b]; i++)
{
sz[a]++;
comp[a][sz[a]]=comp[b][i];
root[comp[b][i]]=a;
}
}
/*
int query(int sza, int szb, int a[], int b[])
{
int i,j;
for (i=1; i<=sza; i++)
{
for (j=1; j<=szb; j++)
{
if (connected[a[i]][b[j]])
{
return 1;
}
}
}
return 0;
}
*/
void add(int type, int &sza, int b[], int szb)
{
if (type==1)
{
int i;
for (i=1; i<=szb; i++)
{
sza++;
c[sza]=b[i];
}
}
else if (type==2)
{
int i;
for (i=1; i<=szb; i++)
{
sza++;
aquery[sza]=b[i];
}
}
else if (type==3)
{
int i;
for (i=1; i<=szb; i++)
{
sza++;
bquery[sza]=b[i];
}
}
}
bool compara(int j)
{
int i;
for (i=1; i<=n; i++)
{
seen[i]=0;
}
int x;
for (i=1; i<=n; i++)
{
x=root[i];
if (!seen[x])
{
if (x&(1<<j))
add(2,aqsz,comp[x],sz[x]);
else
add(3,bqsz,comp[x],sz[x]);
seen[x]=1;
}
}
/*
//debugs(j);
//debugs(aqsz);
//debug(bqsz);
for (i=1;i<=aqsz;i++)
{
//debug(aquery[i]);
}
for (i=1;i<=bqsz;i++)
{
//debug(bquery[i]);
}
*/
return query(aqsz,bqsz,aquery,bquery);
}
pair<int,int> find_road()
{
int i,j;
for (i=0; i<7 && (1<<i)<=n; i++)
{
aqsz=0;
bqsz=0;
//debugs(i);
//debug(compara(i));
if (compara(i)==1)
{
break;
}
}
int r,pas,apoz,bpoz,csize;
r=0;
pas=(1<<7);
while (pas)
{
if (r+pas<=aqsz)
{
csize=0;
add(1,csize,aquery,r+pas);
if (!query(r+pas,bqsz,c,bquery))
r+=pas;
}
pas=pas/2;
}
r++;
apoz=aquery[r];
r=0;
pas=(1<<7);
d[0]=0;
d[1]=apoz;
while (pas)
{
if (r+pas<=bqsz)
{
csize=0;
add(1,csize,bquery,r+pas);
if (!query(r+pas,1,c,d))
r+=pas;
}
pas=pas/2;
}
r++;
bpoz=bquery[r];
return {apoz,bpoz};
}
/*
void build_road()
{
int a,b;
cin >> a >> b;
connected[a][b]=1;
connected[b][a]=1;
}
void setroad(int a, int b)
{
cout << "am gasit lol : ";
cout << a << " " << b << "\n";
unite(a,b);
}
*/
void run(int _n)
{
n=_n;
int pasi,i;
pair<int,int> ans;
for (i=1; i<=n; i++)
{
root[i]=i;
comp[i][1]=i;
sz[i]=1;
}
pasi=0;
while (pasi<n-1)
{
//build_road();///asta trebuie comentat
ans=find_road();
unite(ans.first,ans.second);
//setroad(ans.first,ans.second);
pasi++;
}
}
signed main()
{
//ifstream fin("secvp.in");
//ofstream fout("secvp.out");
//ios_base::sync_with_stdio(0);
//cin.tie(0);
//cout.tie(0);
int en;
cin >> en;
run(en);
}
Compilation message
icc.cpp: In function 'std::pair<int, int> find_road()':
icc.cpp:131:11: warning: unused variable 'j' [-Wunused-variable]
131 | int i,j;
| ^
/usr/bin/ld: /tmp/ccqRAriw.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccSO4Lus.o:icc.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status
