蓝桥杯30天冲刺——今天＋补

[云星のC]

 三角回文数

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char* argv[])
{
	int x = 0, y = 0, i, n;
	for (i = 1;; i++)
	{
		x += i;
		if (x > 20220514)
		{
			n = x;
			while (n != 0)
			{
				y = n % 10 + y * 10;
				n /= 10;
			}
			if (x == y)
			{
				printf("%d", x);
				break;
			}
			y = 0;
		}
	}

	return 0;
}

 分数

#include<stdio.h>
#include<math.h>

int main()
{
	int x, y;
	x = pow(2, 20) - 1;
	y = pow(2, 20);
	printf("%d/%d", x, y);
	return 0;
}

 

#include <stdio.h>
#include <stdlib.h>
 
int main(int argc, char *argv[])
{
    int days[12] = { 31,28,31,30,31,30,31,31,30,31,30,31 };
    int months[12] = { 1,2,3,4,5,6,7,8,9,10,11,12 };
    int arr[8] = { 0 };
    int n = 0;
    scanf("%d", &n);
    int l = n;
    int i = 0;
    int flag = 0;
    int flag2 = 0;
    for (i = n + 1; i < 99991231; i++)
    {
        int year = (i / 10000);
        int zhong = i% 10000;
        int month = zhong / 100;
        int day = zhong % 100;
 
        int j = 0;
        int k = 0;
 
        if ((i % 4 == 0 && i % 100 != 0) || i % 400 == 0)
        {
            days[1] = 29;
 
        }
        if (month > 12 || month <= 0)
        {
            continue;
        }
        if (day > days[month - 1] || day <= 0)
        {
            continue;
        }
 
        for (j = 3; j >= 0; j--)
        {
            arr[j] = year % 10;
            year = year / 10;
        }
 
 
        arr[4] = month / 10;
        arr[5] = month % 10;
        arr[6] = day / 10;
        arr[7] = day % 10;
 
 
        if (arr[0] == arr[7] && arr[1] == arr[6] && arr[2] == arr[5] && arr[3] == arr[4])
        {
 
            flag++;
            if (flag == 1)
            {
                for (k = 0; k < 8; k++)
                {
                    printf("%d", arr[k]);
                    
                }
            printf("\n");
            }
            if (arr[0]==arr[2]&& arr[2]== arr[5]&& arr[5]== arr[7]&& arr[1]== arr[3]&& arr[3] == arr[4]&& arr[4]== arr[6])
            {
                flag2++;
                if (flag2 == 1)
                {
                    for (k = 0; k < 8; k++)
                    {
                        printf("%d", arr[k]);
                    }
                }
 
            }
        }
        
 
 
    }
    return 0;
}