#include "longesttrip.h"
#include <bits/stdc++.h>
#define pb push_back
#define fst first
#define snd second
#define fore(i,a,b) for(ll i=a,ggdem=b;i<ggdem;++i)
#define SZ(x) ((int)x.size())
#define ALL(x) x.begin(),x.end()
#define mset(a,v) memset((a),(v),sizeof(a))
#define FIN ios::sync_with_stdio(0);cin.tie(0);cout.tie(0)
#define imp(v) for(auto messi:v)cout<<messi<<" "; cout<<"\n"
using namespace std;
typedef int ll;
typedef long long LL;
typedef pair<ll,ll> ii;
ll n,d;
ll ask(vector<ll>a, vector<ll>b){
set<ll>sa,sb;
for(auto i:a)sa.insert(i);
for(auto i:b)sb.insert(i);
a.clear(),b.clear();
for(auto i:sa)a.pb(i);
for(auto i:sb)b.pb(i);
return are_connected(a,b);
}
ll find(vector<ll>&a,vector<ll>&b){
/*vector<ll>pre;
fore(i,0,SZ(a)){
pre.pb(a[i]);
if(ask(b,pre))return i;
}*/
ll l=0,r=SZ(a)-1;
while(l<=r){
ll m=(l+r)/2;
vector<ll>pre;
fore(i,0,m+1)pre.pb(a[i]);
if(ask(b,pre))r=m-1;
else l=m+1;
}
return l;
}
vector<ll> rot(vector<ll>a, ll d){ // <--
ll n=SZ(a);
vector<ll>ai(n);
fore(i,0,n)ai[i]=a[(i+d)%n];
return ai;
}
vector<int> longest_trip(int N, int D){
n=N,d=D;
vector<ll>P;
fore(i,0,n)P.pb(i);
//LL sd; srand((LL)&sd);
srand(314159265);
random_shuffle(ALL(P));
vector<vector<ll>>h;
h.pb({P[0]});
h.pb({P[1]});
ll pr=-1;
fore(i,2,n){
ll x=P[i];
if(pr==1){
if(ask({h[0].back()},{x}))h[0].pb(x),pr=0;
else h[1].pb(x),pr=1;
continue:
}
if(ask({h[0].back()},{x}))h[0].pb(x),pr=0;
else if(ask({h[1].back()},{x}))h[1].pb(x),pr=1;
else {
while(SZ(h[1]))h[0].pb(h[1].back()),h[1].pop_back();
h[1]={x};
pr=2;
}
}
/*if(SZ(h[0])>SZ(h[1]))return h[0];
else return h[1];*/
//imp(h[0]); imp(h[1]);
if(!ask({h[0][0],h[0].back()},{h[1][0],h[1].back()})){
if(!ask(h[0],h[1])){
if(SZ(h[0])>SZ(h[1]))return h[0];
else return h[1];
}
ll x=find(h[0],h[1]);
vector<ll>fi={h[0][x]};
ll y=find(h[1],fi);
h[0]=rot(h[0],x+1),h[1]=rot(h[1],y);
}
else if(ask({h[0].back()},{h[1][0]}));
else if(ask({h[0].back()},{h[1].back()}))reverse(ALL(h[1]));
else if(ask({h[0][0]},{h[1][0]}))reverse(ALL(h[0]));
else /*if(ask({h[0][0]},{h[1].back()}))*/
reverse(ALL(h[0])),reverse(ALL(h[1]));
for(auto i:h[1])h[0].pb(i);
h[1].clear();
return h[0];
}
Compilation message
longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:67:12: error: expected ';' before ':' token
67 | continue:
| ^
| ;
longesttrip.cpp:67:12: error: expected primary-expression before ':' token
