题目描述
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分析
cpp
#include<bits/stdc++.h>
using namespace std;
int main()
{
cout << 2 * 9 * 9 * 9 + 0 * 9 * 9 + 2 * 9 + 2;
return 0;
}
题目描述
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分析
全部枚举
cpp
#include<bits/stdc++.h>
using namespace std;
int ans = 0;
int m[13] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
bool is_ren(int x)
{
if((x % 4 == 0 && x % 100 != 0) || x % 400 == 0)return true;
return false;
}
int main()
{
if(is_ren(2022))m[2] = 29;
for(int i = 1; i <= 12; i ++)
{
for(int j = 1; j <= m[i]; j ++)
{
int cnt = 0;
string s = "2022";
if(i < 10)s += "0";
string k = to_string(i);
//cout << k << "KKK" << '\n';
s += k;
if(j < 10)s += "0";
string q = to_string(j);
s += q;
//cout << s << '\n';
for(int p = 0; p < s.size() - 1; p ++)
{
if(s[p] - '0' + 1 == s[p + 1] - '0' && s[p + 1] - '0' + 1 == s[p + 2] - '0')cnt ++;
}
if(cnt)ans ++;
}
}
cout << ans;
return 0;
}