Submission #229722

#	Time	Username	Problem	Language	Result	Execution time	Memory
229722		rrrr10000	Trobojnica (COCI19_trobojnica)	C++14	0 / 110	2085 ms	384 KiB

trobojnica

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n)  for(long long i=0;i<(long long)(n);i++)
#define REP(i,k,n) for(long long i=k;i<(long long)(n);i++)
#define all(a) a.begin(),a.end()
#define pb emplace_back
#define eb emplace_back
#define lb(v,k) (lower_bound(all(v),k)-v.begin())
#define ub(v,k) (upper_bound(all(v),k)-v.begin())
#define fi first
#define se second
#define pi M_PI
#define PQ(T) priority_queue<T>
#define SPQ(T) priority_queue<T,vector<T>,greater<T>>
#define dame(a) {out(a);return 0;}
#define decimal cout<<fixed<<setprecision(15);
#define dupli(a) a.erase(unique(all(a)),a.end())
typedef long long ll;
typedef pair<ll,ll> P;
typedef tuple<ll,ll,ll> PP;
typedef tuple<ll,ll,ll,ll> PPP;
typedef multiset<ll> S;
using vi=vector<ll>;
using vvi=vector<vi>;
using vvvi=vector<vvi>;
using vvvvi=vector<vvvi>;
using vp=vector<P>;
using vvp=vector<vp>;
using vb=vector<bool>;
using vvb=vector<vb>;
const ll inf=1001001001001001001;
const ll INF=1001001001;
const ll mod=1000000007;
const double eps=1e-10;
template<class T> bool chmin(T&a,T b){if(a>b){a=b;return true;}return false;}
template<class T> bool chmax(T&a,T b){if(a<b){a=b;return true;}return false;}
template<class T> void out(T a){cout<<a<<'\n';}
template<class T> void outp(T a){cout<<'('<<a.fi<<','<<a.se<<')'<<'\n';}
template<class T> void outvp(T v){rep(i,v.size())cout<<'('<<v[i].fi<<','<<v[i].se<<')';cout<<'\n';}
template<class T> void outvvp(T v){rep(i,v.size())outvp(v[i]);}
template<class T> void outv(T v){rep(i,v.size()){if(i)cout<<' ';cout<<v[i];}cout<<'\n';}
template<class T> void outvv(T v){rep(i,v.size())outv(v[i]);}
template<class T> bool isin(T x,T l,T r){return (l)<=(x)&&(x)<=(r);}
template<class T> void yesno(T b){if(b)out("yes");else out("no");}
template<class T> void YesNo(T b){if(b)out("Yes");else out("No");}
template<class T> void YESNO(T b){if(b)out("YES");else out("NO");}
template<class T> void noyes(T b){if(b)out("no");else out("yes");}
template<class T> void NoYes(T b){if(b)out("No");else out("Yes");}
template<class T> void NOYES(T b){if(b)out("NO");else out("YES");}
void outs(ll a,ll b){if(a>=inf-100)out(b);else out(a);}
ll gcd(ll a,ll b){if(b==0)return a;return gcd(b,a%b);}
ll modpow(ll a,ll b){a%=mod;if(b==0)return 1;if(b&1)return a*modpow(a,b-1)%mod;ll k=modpow(a,b/2);return k*k%mod;}

int main(){
    ll n;cin>>n;
    vi v(n);
    string t;cin>>t;
    rep(i,n)v[i]=t[i]-'1';
    vi cnt(3);
    rep(i,n)cnt[v[i]]++;
    rep(i,3)if(cnt[i]>=n||cnt[i]%2!=n%2)dame("NE");
    out("DA");
    set<P> s;
    rep(i,n)s.insert(P(i+1,v[i]));
    while(s.size()>3){
        auto itr=s.begin();
        while(s.size()>3){
            P a=*itr;
            itr++;
            if(itr==s.end())itr=s.begin();
            P b=*itr;
            //outp(a);outp(b);outv(cnt);cout<<endl;
            if(a.se==b.se)continue;
            if(cnt[a.se]+cnt[b.se]==2)continue;
            ll c;
            itr++;
            if(itr==s.end())c=s.begin()->fi;
            else c=itr->fi;
            s.erase(a);s.erase(b);
            cout<<a.fi<<' '<<c<<' '<<4-a.se-b.se<<endl;
            s.insert(P(a.fi,3-a.se-b.se));
            cnt[a.se]--;cnt[b.se]--;cnt[4-a.se-b.se]++;
            itr--;
        }
    }
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 40
• Subtask 3: 0 / 50