AtCoder Beginner Contest 106

Submission #3031422

Source codeソースコード

#include<cstdio>
#include<queue>
#include<utility>
#include<cstring>
#include<stack>
#include<algorithm>
#include<cmath>
#include<iostream>
#include<map>
#define MAX_N 100001
#define INF_INT 2147483647
#define INF_LL 9223372036854775807
#define REP(i,n) for(int i=0;i<(int)(n);i++)
void init(int n);
int find(int n);
void unite(int x,int y);
bool same(int x, int y);
int dx[4] = {1,0,0,-1};
int dy[4] = {0,1,-1,0};
using namespace std;
typedef long long int ll;
typedef pair<ll,ll> P;
bool cmp_P(const P &a,const P &b){
  return a.second < b.second;
}
int main()
{
  ll K,ind=1;
  string s;
  cin >> s;
  cin >> K;
  if(s.size() == 1){
    cout << s[0] << endl;
    return 0;
  }
  REP(i,(int)s.size()){
    if(s[i] != '1'){
      ind = i+1;
      break;
    }
  }
  if(K < ind){
    cout << 1 << endl;
  }else{
    cout << s[ind-1] << endl;
  }
  
  return 0;
}

int par[MAX_N];
int ranks[MAX_N];

//n要素で初期化
void init(int n){
  REP(i,n){
    par[i] = i;
    ranks[i] = 0;
  }

}

//木の根を求める
int find(int x){
  if(par[x] == x){
    return x;
  }else{
    return par[x] = find(par[x]);
  }
}

void unite(int x,int y){
  x = find(x);
  y = find(y);
  if(x == y) return ;
  if(ranks[x] < ranks[y]){
    par[x] = y;
  }else{
    par[y] = x;
    if(ranks[x] == ranks[y]) ranks[x]++;
  }
}

bool same(int x, int y){
  return find(x) == find(y);
}

Submission

Task問題 C - To Infinity
User nameユーザ名 mak
Created time投稿日時
Language言語 C++14 (GCC 5.4.1)
Status状態 AC
Score得点 300
Source lengthソースコード長 1454 Byte
File nameファイル名
Exec time実行時間 1 ms
Memory usageメモリ使用量 256 KB

Test case

Set

Set name Score得点 / Max score Cases
Sample - s1.txt,s2.txt,s3.txt
All 300 / 300 in01.txt,in02.txt,in03.txt,in04.txt,in05.txt,in06.txt,in07.txt,in08.txt,in09.txt,in10.txt,in11.txt,in12.txt,in13.txt,s1.txt,s2.txt,s3.txt

Test case

Case name Status状態 Exec time実行時間 Memory usageメモリ使用量
in01.txt AC 1 ms 256 KB
in02.txt AC 1 ms 256 KB
in03.txt AC 1 ms 256 KB
in04.txt AC 1 ms 256 KB
in05.txt AC 1 ms 256 KB
in06.txt AC 1 ms 256 KB
in07.txt AC 1 ms 256 KB
in08.txt AC 1 ms 256 KB
in09.txt AC 1 ms 256 KB
in10.txt AC 1 ms 256 KB
in11.txt AC 1 ms 256 KB
in12.txt AC 1 ms 256 KB
in13.txt AC 1 ms 256 KB
s1.txt AC 1 ms 256 KB
s2.txt AC 1 ms 256 KB
s3.txt AC 1 ms 256 KB