目錄

Educational Codeforces Round 47 (Rated for Div. 2)

那天晚上报名了没打,第二天早上打的,也只出了两题。

A. Game Shopping

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
#include<iostream>
using namespace std;

int main(){
    int n,m,s=0;
    cin>>n>>m;
    int i,j;
    int c[1000],a[1000];
    for(i=0;i<n;i++)
        cin>>c[i];
    for(i=0;i<m;i++)
        cin>>a[i];
    for(i=0,j=0;i<n;){
        if(j==m)
            break;
        if(c[i]<=a[j]){
            s++;
            j++;
            i++;
        }
        else i++;
    }
    if(i==n&&s==0)
        cout<<"0\n";
    else cout<<s<<endl;
	return 0;
}

B. Minimum Ternary String

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
#include <bits/stdc++.h>
using namespace std;

string s, ans;

int main(){
    cin >> s;
    int one = 0;
    for (int i = 0; i < s.size(); i++){
        if (s[i] == '0') ans += "0";
        if (s[i] == '1') one++;
        if (s[i] == '2') ans += "2";
    }
    bool flag = false;
    for (int i = 0; i < ans.size(); i++){
        if (ans[i] == '2' && !flag) flag = true, cout << string(one, '1');
        cout << ans[i];
    }
    if (!flag) cout << string(one, '1');
    return 0;
}

/*

100210

11222121

20

2001

020201

2012101

111

000

*/