제출 #404265

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
404265		Andyvanh1	마라톤 경주 (COCI14_utrka)	C++14	80 / 80	221 ms	11208 KiB

utrka

#include <iostream>
#include <vector>
#include <algorithm>
#include <set>
#include <map>
#include <fstream>
#include <math.h>
#include <iomanip>


using namespace std;

#define vt vector
#define INF 0x3f3f3f3f
#define pb push_back
#define FORR1(n) for(int i = 0; i < n; i++)
#define FORR2(i,n) for(int i = 0; i < n; i++)
#define all(u) u.begin(),u.end()

typedef long long ll;
typedef vt<int> vi;
typedef pair<int,int> pii;

struct CTD{
    int size;
    vi par;
    vt<set<int>> tree;
    vi sub;
    void init(vt<set<int>> &adj){
        size = adj.size();
        par.resize(size);
        tree=adj;
        sub.resize(size);
        par[0] = -1;
        build(0,-1);
    }
    void build(int u, int p) {
        int n = dfs(u, p); // find the size of each subtree
        int centroid = find_centroid(u, p, n); // find the centroid
        par[centroid] = p;

        // for each tree resulting from the removal of the centroid
        set<int> ref = tree[centroid];
        for (auto v : ref) {
            tree[centroid].erase(v); // remove the edge to disconnect
            tree[v].erase(centroid); // the component from the tree
            build(v, centroid);
        }
    }



    int dfs(int u, int p) {
        sub[u] = 1;

        for (auto v : tree[u])
            if (v != p) sub[u] += dfs(v, u);

        return sub[u];
    }

    int find_centroid(int node, int p, int n){
        for(auto& e: tree[node]){
            if(e!=p&&sub[e]>n/2){
                return find_centroid(e,node,n);
            }
        }
        return node;
    }


};

struct fwtree{
    int size;
    vi arr;
    void init(int n){
        size = n;
        arr.resize(n+2);
        for(int i = 0; i < n+2; i++){
            arr[i] = 0;
        }
    }

    void update(int i, int x){
        for(; i <= size; i+=i&-i){
            arr[i]+=x;
        }
    }

    int get(int i){
        int ans = 0;
        for(; i > 0; i-=i&-i){
            ans+=arr[i];
        }
        return ans;
    }

    int get(int l, int r){
        return get(r)-get(l-1);
    }

};

struct point{
    long double x, y;

};

bool operator<(point p1, point p2){
   return p2.x>p1.x||(p2.x==p1.x&&p2.y>p1.y);
}

struct rect{
    int left, right, top, bottom;
};

pair<int,int> get(char c){
    if(c=='z'){
        return {9,4};
    }else if(c=='s'){
        return {7,4};
    }else if(c>'s'){
        c--;
    }

    int x = int(c-'a');
    return{x/3+2,x%3+1};

}

void solve(){
multiset<string> names;
int n;
cin>>n;
for(int i = 0; i < n; i++){
    string s;
    cin>>s;
    names.insert(s);
}
for(int i = 0; i < n-1; i++){
    string s;
    cin>>s;
    names.erase(names.find(s));
}
cout<<(*(names.begin()));

}

int main() {
    solve();
    return 0;
}

• Subtask 1: 80 / 80