题目及AC代码：

181.迭代法求值

#include<bits/stdc++.h>
using namespace std;
int main(){double a,b;cin>>a;b=sqrt(a);printf("%.4lf\n",b);return 0;
}

182.级数求和

#include<bits/stdc++.h>
using namespace std;
int main(){int k,i;double s=0;cin>>k;for(int i=1;;i++){s=s+1.0/i;if(s>k){k=i;break;}}cout<<k;return 0;
}

183.角谷猜想

#include<bits/stdc++.h>
using namespace std;
int main(){long long a,b;cin>>a;if(a==1){cout<<"End";return0;}while(a!=1){if(a%2==0){cout<<a<<"/2="<<a/2<<endl;a=a/2;}elseif(a%2==1){cout<<a<<"*3+1="<<a*3+1<<endl;a=a*3+1;}}cout<<"End";return 0;
}

184.对对交换

#include<bits/stdc++.h>
using namespace std;
int main(){long long a,b;cin>>a;for(int i=1;i<=a-1;i=i+2){cout<<i+1<<" "<<i<<" ";}return 0;
}

185.找规律填数字

#include<bits/stdc++.h>
using namespace std;
int main(){int a,b,c,d,e,f,h;double g;while(1){cin>>a>>b>>c>>d>>e;if(a==0&&b==0&&c==0&&d==0&&e==0){break;}if(b-a==c-b&&c-b==d-c){f=b-a;for(int i=0;i<5;i++){e=e+f;cout<<e<<" ";}cout<<endl;}elseif((b*1.0/a==c*1.0/b)&&(c*1.0/b==d*1.0/c)){g=b*1.0/a;for(int i=0;i<5;i++){e=e*g;cout<<e<<" ";}cout<<endl;}else{for(int i=0;i<5;i++){h=e+d;cout<<h<<" ";d=e;e=h;}cout<<endl;}}return 0;
}

186.求分数序列和

#include<bits/stdc++.h>
using namespace std;
int main(){double a,p=1,q=2,d=0,e;cin>>a;for(int i=1;i<=a;i++){d=d+q/p;e=q;q=q+p;p=e;}printf("%.4lf",d);return 0;
}

187.计算分数加减表达式的值

#include<bits/stdc++.h>
using namespace std;
int main(){double a,p=1,q=2,d=0,e,b;cin>>a;for(int i=1;i<=a;i++){if(i%2!=0){d=d+1.0/i;}else{d=d-1.0/i;}}printf("%.4lf",d);return 0;
}

188.求阶乘的和

#include<bits/stdc++.h>
using namespace std;
int main(){int n;scanf("%d",&n);long long s=0,t=1;for(int i=1;i<=n;i++){t=1;for(int j=1;j<=i;j++){t=t*j;}s=s+t;}cout<<s;return 0;
}

189.求出e的值

#include<bits/stdc++.h>
using namespace std;
int main(){int n;cin>>n;double s=0,t=1;for(int i=1;i<=n;i++){t=1;for(int j=1;j<=i;j++){t/=j;}s+=t;}printf("%.10lf",s+1);return 0;
}

190.计算多项式的值

#include<bits/stdc++.h>
using namespace std;
int main(){long double x,n,s=1,a=1;cin>>x>>n;for(int i=1;i<=n;i++){a=a*x;s=s+a;}printf("%.2Lf",s);return 0;
}

191.年龄与疾病

#include<bits/stdc++.h>
using namespace std;
int main(){double x,n,s=0,a=0,b=0,c=0;cin>>x;for(int i=0;i<x;i++){cin>>n;if(n<19){s++;}elseif(n>=19&&n<=35){a++;}elseif(n>=61){c++;}else{b++;}}printf("%.2lf%\n",s*100/x);printf("%.2lf%\n",a*100/x);printf("%.2lf%\n",b*100/x);printf("%.2lf%\n",c*100/x);return 0;
}

192.不高兴的津津

#include<bits/stdc++.h>
using namespace std;
int main(){longlong a,b,s=0,max=0,c,d;for(int i=0;i<7;i++){s=0;cin>>a>>b;s=s+a+b;if(s>max){max=s;c=i+1;d=b;}}if(max>8) cout<<c;else cout<<"0";return 0;
}

193.最长平台

#include<bits/stdc++.h>
using namespace std;
int main(){int n,a[1001],s=1,max=1;cin>>n;for(int i=0;i<n;i++){cin>>a[i];}for(int i=0;i<n;i++){if(a[i]==a[i+1]){s++;if(max<s){max=s;}}else{s=1;}}cout<<max;return 0;
}

194.雇佣兵

#include<bits/stdc++.h>
using namespace std;
int main(){int m,n,x;cin>>m>>n>>x;int a=m,s=0;  m=0;  while(x){m+=n;x--;if(m>=a){m=a;break;}}if(m==a){while(m){m--;s++;if(s==n){n++;s=0;}if(m==0){s=0;while(x){m+=n;x--; if(m>=a){m=a;break;}}}}}cout<<n;return 0;
}

195.计算多项式的导函数

#include<bits/stdc++.h>
using namespace std;
int main(){int n,a;cin>>n;if(n==0){printf("0");} n++;while(n--){cin>>a;if(n){cout<<a*n<<" ";}}return 0;
}

196.与7无关的数

#include<bits/stdc++.h>
using namespace std;
int main(){int a,s=0;cin>>a;for(int i=1;i<=a;i++){if(i%7!=0&&i%10!=7&&i/10%10!=7&&i/100%10!=7){s=s+i*i;}}cout<<s;return 0;
}

197.数1的个数

#include<bits/stdc++.h>
using namespace std;
int main(){int a,s=0,b;cin>>a;for(int i=1;i<=a;i++){int c=i;while(c){b=c%10;if(b==1){s++;}c=c/10;}}cout<<s;return 0;
}

198.数字统计

#include<bits/stdc++.h>
using namespace std;
int main(){int a,s=0,b,d;cin>>a>>d;for(int i=a;i<=d;i++){int c=i;while(c){b=c%10;if(b==2){s++;}c=c/10;}}cout<<s;return 0;
}

199.正整数分解

#include<bits/stdc++.h>
using namespace std;
int main(){int a,s=0;cin>>a;for(int i=1;i<a;i++){if(i%7==0&&(a-i)%3==0){if((i>a/2)&&(i%3==0&&(a-i)%7==0)){continue;}s++;cout<<i<<" "<<a-i<<endl;}}cout<<s;return 0;
}