Submission #312741

#	Time	Username	Problem	Language	Result	Execution time	Memory
312741		mohamedsobhi777	ICC (CEOI16_icc)	C++14	100 / 100	206 ms	1144 KiB

icc

#include<bits/stdc++.h>
#include "icc.h"

#define I inline void 
#define S struct 
#define vi vector<int> 
#define vii vector<pair<int,int>>
#define pii pair<int,int>
#define pll pair<ll,ll>

using namespace std ; 
using ll = long long ; 
using ld = long double ; 

const int N = 1e5 + 7 , mod = 1e9 + 7 ; 
const int inf = N ; 
// How interesting!

int n ; 
int fat[N] ;
vector<pair<int,int> > ed ; 
int U , V ; 

inline int find(int x){return fat[x] = (x == fat[x] ? x : find(fat[x])) ; }

void link(int u , int v){
        u = find(u) ; 
        v = find(v) ;
        if(u!=v) 
                fat[u] = v; 
}

int query1(int x , int y , vector<int> v1 , vector<int> v2){
        int *v11;
        int *v22 ; 
        v11 = new int[x] ; 
        v22 = new int [y] ; 
        for(int i = 0 ;i < x ; ++ i)
                v11[i] = v1[i] ; 
        for(int i = 0 ;i < y ; ++ i)
                v22[i] = v2[i] ; 
        return query(x , y , v11 , v22) ; 
}

void divide(vector<vector<int> > &vec){
        vector<vector<int> > ret ; 
        int sz = (int) vec.size() ; 
        for(int i = 0 ;i < sz ; ++ i){
                int sz2 = (int) vec[i].size() ; 
                if(sz2<2)continue ;
                vector<int> lhs, rhs ;
                for(int j = 0 ;j < sz2 ;++ j){
                        if(j < sz2 / 2 )
                                lhs.push_back(vec[i][j]) ; 
                        else 
                                rhs.push_back(vec[i][j]) ; 
                }
                if(lhs.size())
                ret.push_back(lhs) ; 
                if(rhs.size())
                ret.push_back(rhs) ; 
        }
        vec = ret ; 
}

vector<int> chd(int x){
        vector<int> ret ;
        for(int i = 1 ;i <= n; ++ i){
                if(find(i) == x)
                        ret.push_back(i) ;
        }
        return ret ;
}

int conquer(vector<vector<int> > &vec, int lmt = 1000000){
        int ret = 0 ; 
        vector<int> lhs, rhs ; 
        for(int i = 0 ; i < min(lmt , (int) vec.size() ) ; ++ i){
                for(auto u : vec[i]){
                        if(i&1)
                                for(auto v : chd(u))
                                        rhs.push_back(v) ; 
                        else for(auto v : chd(u))
                                lhs.push_back(v) ; 
                }
        }  
        return query1(lhs.size() , rhs.size() , lhs , rhs ) ; 
}

vector<int> qur(vector<int> ve){
        vector<int> ret ; 
        for(auto u : ve)
                for(auto v : chd(u))
                        ret.push_back(v) ; 
        return ret; 
}

void getRoad(vector<int> v1, vector<int> v2){
        vector<int> now = v1, oth = v2 ; 
        int lo = 1 , hi = v1.size() ; 
        int u = 0 , v = 0 ; 
        while(lo<=hi){
                int mid = (lo+hi)>>1;
                vector<int> nnow ; 
                for(int i = 0 ; i < mid ; ++ i)
                        nnow.push_back(now[i]) ; 
                if(query1(nnow.size() ,oth.size(),nnow,oth)){
                        hi = mid - 1; 
                        u = nnow.back() ; 
                }else{
                        lo = mid + 1; 
                }
        }
        swap(now,oth) ; 
        swap(u , v) ; 
        lo = 1, hi = (int) now.size() ; 
        while(lo<=hi){
                int mid = (lo+hi)>>1;
                vector<int> nnow ; 
                for(int i = 0 ; i < mid ; ++ i)
                        nnow.push_back(now[i]) ; 
                if(query1(nnow.size() ,oth.size(),nnow,oth)){
                        hi = mid - 1; 
                        u = nnow.back() ; 
                }else{
                        lo = mid + 1; 
                }
        }
        setRoad(u , v) ; 
        link(u , v) ; 
}

void divide_or_conquer(vector<int> hs){
        vector<vector<int> > dac { hs } ; 
        divide(dac) ; 
        while(!conquer(dac))divide(dac) ; 
        int lo = 1, hi = (int) dac.size(); 
        int lst = (int) dac.size() ; 
        while(lo<=hi){
                int mid = (lo+hi) >> 1;
                if(conquer(dac, min((int)dac.size(),mid) )){
                        lst = mid ; 
                        hi = mid - 1; 
                }else lo = mid + 1; 
        }
        getRoad(qur(dac[lst-2]) , qur(dac[lst-1]) ) ;
}

void run(int x){
        n = x;
        for(int i = 1;i <= n; ++ i)
                fat[i] = i ;
        for(int r = 0 ; r < n - 1; ++ r){
                vector<int> v ; 
                for(int i = 1;i <= n; ++ i){
                        if(i == fat[i])
                                v.push_back(i) ; 
                }
                random_shuffle(v.begin() , v.end()) ;
                divide_or_conquer(v) ; 
        }
}

Compilation message (stderr)

icc.cpp: In function 'int conquer(std::vector<std::vector<int> >&, int)':
icc.cpp:76:13: warning: unused variable 'ret' [-Wunused-variable]
   76 |         int ret = 0 ;
      |             ^~~

• Subtask 1: 7 / 7
• Subtask 2: 11 / 11
• Subtask 3: 22 / 22
• Subtask 4: 21 / 21
• Subtask 5: 29 / 29
• Subtask 6: 10 / 10