Submission #293150

#	Time	Username	Problem	Language	Result	Execution time	Memory
293150		Leonardo16	Split the Attractions (IOI19_split)	C++14	40 / 100	161 ms	23792 KiB

split

///   Code by Leonardo16
/// “Your focus determines your reality.” – Qui-Gon Jinn
#include<bits/stdc++.h>
using namespace std;
#pragma GCC optimize("Ofast","unroll-loops","omit-frame-pointer","inline")
//#pragma GCC option("arch=native","tune=native","no-zero-upper")
//#pragma GCC target("avx2")
//#define int  long long
#define ll long long
#define sz size
#define ull unsigned long long
#define ld long double
#define ii pair<int,int>
#define fst first
#define scd second
#define vi vector<int>
#define vii vector<ii>
#define pb push_back
#define pf push_front
#define fl '\n'
#define el endl
#define all(x) x.begin() , x.end()
#define rall(x) x.rbegin() , x.rend()
/// Functions
#define db(x) cerr << #x << ": " << (x) << '\n';
#define random() __builtin_ia32_rdtsc()
#define lg2(x) 31-__builtin_clz(x)
#define lg2ll(x) 63-__builtin_clzll(x)
#define pi acos(-1)
#define YN(x) cout<<((x)?("YES"):("NO"))<<fl;
#define yn(x) cout<<((x)?("Yes"):("No"))<<fl;
#define des(x,s1,s2,end1,end2) cout<<((x)?(s1):(s2))<<fl;if(x){end1;}else{end2;}
#define precision(x) cout.setf(ios::fixed);cout.precision(x);
/// Red-Black Tree Template
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
//using namespace __gnu_pbds;
//typedef tree < long long ,  null_type ,  less<long long> ,  rb_tree_tag ,  tree_order_statistics_node_update > ordered_set;
//#define less_than(n) order_of_key(n)
//#define en_pos(n) find_by_order(n)
/// Prime numbers  173,179,311,331,737,1009,2011,2027,3079,4001,100003
///=====================================================================
vi g[200005];
bool mk[200005];
int n,a,b,c;

int dp[200005];

bool found=false;
bool mk2[200005];

vi vb,va,vc;

void dfb(int u){
    if(vb.sz()<b)vb.pb(u);
    else return;
    mk2[u]=true;
    for(auto v:g[u]){
        if(mk2[v])continue;
        dfb(v);
    }
}


void dfa(int u){
    if(va.sz()<a)va.pb(u);
    else return;
    mk2[u]=true;
    for(auto v:g[u]){
        if(mk2[v])continue;
        dfa(v);
    }
}


void dfc(int u){
    if(vc.sz()<c)vc.pb(u);
    else return;
    mk2[u]=true;
    for(auto v:g[u]){
        if(mk2[v])continue;
        dfc(v);
    }
}



void dfsab(int u){
    mk[u]=true;

    dp[u]=1;
    int p=-1;
    for(auto v:g[u]){
        if(mk[v]){p=v;continue;}
        dfsab(v);
        dp[u]+=dp[v];
    }



    if(!found ){
        if( dp[u]>=a && n-dp[u]>=b ){
            found=true;
            mk2[u]=1;
            dfb(p);
            va.pb(u);
            for(auto v:g[u]){
                if(v!=p){
                    dfa(v);
                }
            }
            return;
        }
        if( dp[u]>=a && n-dp[u]>=c ){
            found=true;
            mk2[u]=1;
            dfc(p);
            va.pb(u);
            for(auto v:g[u]){
                if(v!=p){
                    dfa(v);
                }
            }
            return;
        }

        if( dp[u]>=b && n-dp[u]>=c ){
            found=true;
            mk2[u]=1;
            dfc(p);
            vb.pb(u);
            for(auto v:g[u]){
                if(v!=p){
                    dfb(v);
                }
            }
            return;
        }


        if( dp[u]>=b && n-dp[u]>=a ){
            found=true;
            mk2[u]=1;
            dfa(p);
            vb.pb(u);
            for(auto v:g[u]){
                if(v!=p){
                    dfb(v);
                }
            }
            return;
        }



        if( dp[u]>=c && n-dp[u]>=a ){
            found=true;
            mk2[u]=1;
            dfa(p);
            vc.pb(u);
            for(auto v:g[u]){
                if(v!=p){
                    dfc(v);
                }
            }
            return;
        }


        if( dp[u]>=c && n-dp[u]>=b ){
            found=true;
            mk2[u]=1;
            dfb(p);
            vc.pb(u);
            for(auto v:g[u]){
                if(v!=p){
                    dfc(v);
                }
            }
            return;
        }





    }
}


vi find_split(int nn,int aa,int bb,int cc,vi p,vi q){
    n=nn;a=aa;b=bb;c=cc;

    vi sol;

    for(int i=0;i<n;i++){
        sol.pb(0);
    }
    for(int i=0;i<p.sz();i++){
        g[p[i]].pb(q[i]);
        g[q[i]].pb(p[i]);
    }



    dfsab(0);


    if(va.sz()>0 || vb.sz()>0 ){
        map<int,int>mp;
        mp[1]++;mp[2]++;mp[3]++;

        for(auto it:va){
            sol[it]=1;
            mp.erase(1);
        }

        for(auto it:vb){
            sol[it]=2;
            mp.erase(2);
        }

        for(auto it:vc){
            sol[it]=3;
            mp.erase(3);
        }

        int rem=0;
        for(auto it:mp){
           rem=it.fst;
        }

        for(int i=0;i<n;i++){
            if(sol[i]==0){
                sol[i]=rem;
            }
        }

        return sol;
    }

    return sol;
}

//main(){
//    find_split(6, 2, 2, 2, {0, 0, 0, 0, 0}, {1, 2, 3, 4, 5});
//
//}

Compilation message (stderr)

split.cpp: In function 'void dfb(int)':
split.cpp:55:15: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   55 |     if(vb.sz()<b)vb.pb(u);
      |        ~~~~~~~^~
split.cpp: In function 'void dfa(int)':
split.cpp:66:15: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   66 |     if(va.sz()<a)va.pb(u);
      |        ~~~~~~~^~
split.cpp: In function 'void dfc(int)':
split.cpp:77:15: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   77 |     if(vc.sz()<c)vc.pb(u);
      |        ~~~~~~~^~
split.cpp: In function 'std::vector<int> find_split(int, int, int, int, std::vector<int>, std::vector<int>)':
split.cpp:199:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  199 |     for(int i=0;i<p.sz();i++){
      |                 ~^~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 11 / 11
• Subtask 3: 22 / 22
• Subtask 4: 0 / 24
• Subtask 5: 0 / 36