2020第一届大湾区信息学竞赛U12组参考答案

客官°小女子只卖身不卖艺 2023-03-04 08:18 111阅读 0赞

# 参考答案 #

## 一、选择 ##

1 B  
2 C  
3 D  
4 C  
5 A  
6 A  
7 C  
8 C  
9 B  
10 D

## 二、填空 ##

1.  24
2.  49/825
3.  32
4.  3
5.  3

## 三、阅读程序并填空 ##

#include <iostream>
    using namespace std;
    
    int n, cnt;
    
    int main()
    { 
        cin >> n;
        for(int i = 1; i <= n; i++)
        { 
            int flag = 1;
            if(i % 3 == 0)
            { 
                continue;
            }
    
            int x = i;
            while(x)
            { 
                if(x % 10 == 3)
                { 
                    flag = 0;
                    break;
                }
    
                x /= 10;
            }
    
            if(flag)
            { 
                cnt++;
            }
        }
    
        cout << cnt << endl;
    
        return 0;
    }

#include <iostream>
    using namespace std;
    
    int main()
    { 
        char num[50];
        int n;
        int cnt = 0;
        cin >> n;
        while(n > 0)
        { 
            num[cnt] = n % 10 + '0';
            n = n / 10;
            cnt = cnt + 1;
        }
        num[cnt] = '\0';
        cout << num;
    
        return 0;
    }

## 四、编程 ##

#include <iostream>
    using namespace std;
    
    const int maxN = 1005;
    int a[maxN];
    
    int main()
    { 
        int n;
        cin >> n;
        for(int i = 1; i <= n; i++)
        { 
            cin >> a[i];
        }
    
        //分糖果的过程
        for(int i = 1; i <= n; i++)
        { 
            int L = (1 == i) ? n : i - 1;
            a[L] += a[i] / 3;
    
            int R = (n == i) ? 1 : i + 1;
            a[R] += a[i] / 3;
    
            a[i] /= 3;
        }
    
        for(int i = 1; i <= n; i++)
        { 
            cout << a[i] << ' ';
        }
    
        return 0;
    }

#include <iostream>
    using namespace std;
    
    int main()
    { 
        string s[10] = { "zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"};
    
        int n;
        cin >> n;
        while(n--)
        { 
            int x;
            cin >> x;
            cout << s[x] << endl;
        }
    
        return 0;
    }

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[20200802171613985.png]: /images/20230208/8ec764a074d34a619162f238e0ff35a4.png