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黄海 1 year ago
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2
TangDou/LanQiaoBei/ZhongGaoJi/LanQiao15STEMA202312/10.cpp
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using namespace std;
int k;
string kill(string s) {
int p = 0;
int p = s[s.size() - 1]; // 最后一位是默认值
for (int i = 0; i < s.size() - 1; i++)
if (s[i + 1] > s[i]) {
p = i;

5
TangDou/LanQiaoBei/ZhongGaoJi/LanQiao15STEMA202312/7.cpp
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@ -2,12 +2,13 @@
using namespace std;
bool check(int x) {
int sum = 0;
while (x) {
int a = x % 10;
x /= 10;
if (a % 2 == 0) return false;
sum += a;
}
return true;
return sum % 2 == 0;
}
int main() {

92
TangDou/LanQiaoBei/ZhongGaoJi/复习.md
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## 复习提纲
![](https://dsideal.obs.cn-north-1.myhuaweicloud.com/HuangHai/BlogImages/202403061946897.png)
以$A$为例，5进制理解为$5^0,5^1,5^2,5^3$
$(1234)_5=1*4+3*5+2*25+1*125=194$
$(302)_8=2*8^0+0*8^1+3*8^2=2*1+0*8+3*64=194$
$(11000100)_2=(304)_8$ 与$(302)_8$不同，所以答案是$C$
$(C2)_{16}=2*1+12*16=194$
![](https://dsideal.obs.cn-north-1.myhuaweicloud.com/HuangHai/BlogImages/202403061959229.png)
```cpp {.line-numbers}
#include <bits/stdc++.h>
using namespace std;
bool check(int x) {
int sum = 0;
while (x) {
int a = x % 10;
x /= 10;
sum += a;
}
return sum % 2 == 0;
}
int main() {
int n, m;
cin >> n >> m;
for (int i = n; i <= m; i++)
if (check(i))
cout << i << endl;
return 0;
}
```
![](https://dsideal.obs.cn-north-1.myhuaweicloud.com/HuangHai/BlogImages/202403062003538.png)
```cpp {.line-numbers}
#include <bits/stdc++.h>
using namespace std;
int main() {
string s;
cin >> s;
int m;
cin >> m;
m--;
while (m--) {
string t;
for (int i = 0; i < s.size(); i++) {
int c = 1;
while (i + 1 < s.size() && s[i + 1] == s[i]) {
c++;
i++;
}
t = t + to_string(c) + s[i];
}
s = t;
}
cout << s << endl;
return 0;
}
```
![](https://dsideal.obs.cn-north-1.myhuaweicloud.com/HuangHai/BlogImages/202403062017538.png)
```cpp {.line-numbers}
#include <bits/stdc++.h>
using namespace std;
int k;
string kill(string s) {
int p = 0;
for (int i = 0; i < s.size() - 1; i++)
if (s[i + 1] > s[i]) {
p = i;
break;
}
string res;
for (int i = 0; i < s.size(); i++)
if (i != p) res += s[i];
return res;
}
int main() {
string s;
cin >> s >> k;
for (int i = 1; i <= k; i++) s = kill(s);
cout << s << endl;
return 0;
}
```

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TangDou/LanQiaoBei/ZhongGaoJi/复习.pdf
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TangDou/LanQiaoBei/ZhongGaoJi/复习_tmp.html
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<h2 id="%E5%A4%8D%E4%B9%A0%E6%8F%90%E7%BA%B2">复习提纲</h2>
<p><img src="https://dsideal.obs.cn-north-1.myhuaweicloud.com/HuangHai/BlogImages/202403061946897.png" alt=""></p>
<p>以$A$为例，5进制理解为$5^0,5^1,5^2,5^3$
$(1234)_5=1<em>4+3</em>5+2<em>25+1</em>125=194$
$(302)_8=2<em>8^0+0</em>8^1+3<em>8^2=2</em>1+0<em>8+3</em>64=194$
$(11000100)_2=(304)_8$ 与$(302)<em>8$不同，所以答案是$C$
$(C2)</em>{16}=2<em>1+12</em>16=194$</p>
<p><img src="https://dsideal.obs.cn-north-1.myhuaweicloud.com/HuangHai/BlogImages/202403061959229.png" alt=""></p>
<pre class="hljs"><code><div><span class="hljs-meta">#<span class="hljs-meta-keyword">include</span> <span class="hljs-meta-string">&lt;bits/stdc++.h&gt;</span></span>
<span class="hljs-keyword">using</span> <span class="hljs-keyword">namespace</span> <span class="hljs-built_in">std</span>;
<span class="hljs-function"><span class="hljs-keyword">bool</span> <span class="hljs-title">check</span><span class="hljs-params">(<span class="hljs-keyword">int</span> x)</span> </span>{
<span class="hljs-keyword">int</span> sum = <span class="hljs-number">0</span>;
<span class="hljs-keyword">while</span> (x) {
<span class="hljs-keyword">int</span> a = x % <span class="hljs-number">10</span>;
x /= <span class="hljs-number">10</span>;
sum += a;
}
<span class="hljs-keyword">return</span> sum % <span class="hljs-number">2</span> == <span class="hljs-number">0</span>;
}
<span class="hljs-function"><span class="hljs-keyword">int</span> <span class="hljs-title">main</span><span class="hljs-params">()</span> </span>{
<span class="hljs-keyword">int</span> n, m;
<span class="hljs-built_in">cin</span> &gt;&gt; n &gt;&gt; m;
<span class="hljs-keyword">for</span> (<span class="hljs-keyword">int</span> i = n; i &lt;= m; i++)
<span class="hljs-keyword">if</span> (check(i))
<span class="hljs-built_in">cout</span> &lt;&lt; i &lt;&lt; <span class="hljs-built_in">endl</span>;
<span class="hljs-keyword">return</span> <span class="hljs-number">0</span>;
}
</div></code></pre>
<p><img src="https://dsideal.obs.cn-north-1.myhuaweicloud.com/HuangHai/BlogImages/202403062003538.png" alt=""></p>
<pre class="hljs"><code><div><span class="hljs-meta">#<span class="hljs-meta-keyword">include</span> <span class="hljs-meta-string">&lt;bits/stdc++.h&gt;</span></span>
<span class="hljs-keyword">using</span> <span class="hljs-keyword">namespace</span> <span class="hljs-built_in">std</span>;
<span class="hljs-function"><span class="hljs-keyword">int</span> <span class="hljs-title">main</span><span class="hljs-params">()</span> </span>{
<span class="hljs-built_in">string</span> s;
<span class="hljs-built_in">cin</span> &gt;&gt; s;
<span class="hljs-keyword">int</span> m;
<span class="hljs-built_in">cin</span> &gt;&gt; m;
m--;
<span class="hljs-keyword">while</span> (m--) {
<span class="hljs-built_in">string</span> t;
<span class="hljs-keyword">for</span> (<span class="hljs-keyword">int</span> i = <span class="hljs-number">0</span>; i &lt; s.size(); i++) {
<span class="hljs-keyword">int</span> c = <span class="hljs-number">1</span>;
<span class="hljs-keyword">while</span> (i + <span class="hljs-number">1</span> &lt; s.size() &amp;&amp; s[i + <span class="hljs-number">1</span>] == s[i]) {
c++;
i++;
}
t = t + to_string(c) + s[i];
}
s = t;
}
<span class="hljs-built_in">cout</span> &lt;&lt; s &lt;&lt; <span class="hljs-built_in">endl</span>;
<span class="hljs-keyword">return</span> <span class="hljs-number">0</span>;
}
</div></code></pre>
<p><img src="https://dsideal.obs.cn-north-1.myhuaweicloud.com/HuangHai/BlogImages/202403062017538.png" alt=""></p>
<pre class="hljs"><code><div><span class="hljs-meta">#<span class="hljs-meta-keyword">include</span> <span class="hljs-meta-string">&lt;bits/stdc++.h&gt;</span></span>
<span class="hljs-keyword">using</span> <span class="hljs-keyword">namespace</span> <span class="hljs-built_in">std</span>;
<span class="hljs-keyword">int</span> k;
<span class="hljs-function"><span class="hljs-built_in">string</span> <span class="hljs-title">kill</span><span class="hljs-params">(<span class="hljs-built_in">string</span> s)</span> </span>{
<span class="hljs-keyword">int</span> p = <span class="hljs-number">0</span>;
<span class="hljs-keyword">for</span> (<span class="hljs-keyword">int</span> i = <span class="hljs-number">0</span>; i &lt; s.size() - <span class="hljs-number">1</span>; i++)
<span class="hljs-keyword">if</span> (s[i + <span class="hljs-number">1</span>] &gt; s[i]) {
p = i;
<span class="hljs-keyword">break</span>;
}
<span class="hljs-built_in">string</span> res;
<span class="hljs-keyword">for</span> (<span class="hljs-keyword">int</span> i = <span class="hljs-number">0</span>; i &lt; s.size(); i++)
<span class="hljs-keyword">if</span> (i != p) res += s[i];
<span class="hljs-keyword">return</span> res;
}
<span class="hljs-function"><span class="hljs-keyword">int</span> <span class="hljs-title">main</span><span class="hljs-params">()</span> </span>{
<span class="hljs-built_in">string</span> s;
<span class="hljs-built_in">cin</span> &gt;&gt; s &gt;&gt; k;
<span class="hljs-keyword">for</span> (<span class="hljs-keyword">int</span> i = <span class="hljs-number">1</span>; i &lt;= k; i++) s = kill(s);
<span class="hljs-built_in">cout</span> &lt;&lt; s &lt;&lt; <span class="hljs-built_in">endl</span>;
<span class="hljs-keyword">return</span> <span class="hljs-number">0</span>;
}
</div></code></pre>
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