首师大附中科创教育平台 我的刷题记录（7）

首师大附中科创教育平台我的刷题记录（这次给大家刷多一点，31--40题吧）

仅供同学们参考，禁止抄袭！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！

#include<iostream>
using namespace std;
int main()
{
    int n;
    cin>>n;
    if(n%4==0&&n%100!=0||n%400==0)
        cout<<"yes"<<endl;
    else
        cout<<"no"<<endl;
    return 0;
}

#include<iostream>
using namespace std;
int main()
{
    int n;
    cin>>n;
    if(n<101&&n>84)
        cout<<"A"<<endl;
    if(n<85&&n>74)   
        cout<<"B"<<endl;
    if(n<75&&n>59)
        cout<<"C"<<endl;
    if(n<60)
        cout<<"D"<<endl;
    return 0;
}

#include<iostream> 
using namespace std; 
int main() 
{ 
     int n; 
     cin>>n; 
     if(n==1) 
         cout<<"星期一"<<endl;  
     if(n==2) 
         cout<<"星期二"<<endl;  
     if(n==3) 
         cout<<"星期三"<<endl;  
     if(n==4) 
         cout<<"星期四"<<endl;  
     if(n==5) 
         cout<<"星期五"<<endl;  
     if(n==6) 
         cout<<"星期六"<<endl;  
     if(n==7) 
         cout<<"星期日"<<endl;  
     if(n!=1&&n!=2&&n!=3&&n!=4&&n!=5&&n!=6&&n!=7) 
         cout<<"输入有误"<<endl; 
    return 0; 
} 

#include<iostream>
using namespace std;
int main()
{
    int n;
    cin>>n;
    if(n<=3)cout<<"10";
    if(n>3&&n<=15)cout<<(n-3)*2+10;
    if(n>15)cout<<(n-15)*2.4+34;
    return 0;    
} 

#include<iostream>
using namespace std;
int main()
{
    double n,a;
    cin>> n;
    if(n<=100)cout<<n<<endl;
    if(n>100&&n<=300)cout<<9*n/10<<endl;
    a=(n-300)*8/10;
    if(n>300)cout<<300*9/10+a<<endl;
    return 0;
}

#include<iostream>
using namespace std;
int main()
{
    double n;
    cin>> n;
    if(n<300)cout<<n<<endl;
    if(n>=300&&n<500)cout<<n*9/10<<endl;
    if(n>=500&&n<1000)cout<<8*n/10<<endl;
    if(n>=1000)cout<<n-300<<endl;
    return 0;
}

#include<iostream>
#include<cmath>
using namespace std;
int main()
{
    double a,b,c,m,x1,x2;
    cin>>a>>b>>c;
    m=b*b-4*a*c;
    if(m>0)
    {
       x1=(-b-sqrt(m))/(2*a);
       x2=(-b+sqrt(m))/(2*a);
       cout<<x1<<" "<<x2;
    }
    else
    {
       if(m<0)cout<<"No";
       else cout<<-b/(2*a);
    }
    return 0;
}

#include <cstdlib>  
#include <iostream> 
using namespace std; 
int main(int argc, char *argv[]) 
{ 
    long int y,m,d,a; char x;  
    cin>>y>>x>>m>>x>>d;  
    if(y%4==0&&y%100!=0||y%400==0) a=29;  
    else a=28; 
    if(m>1) d=d+31;  
    if(m>2) d=d+a;  
    if(m>3) d=d+31;  
    if(m>4) d=d+30; 
    if(m>5) d=d+31;  
    if(m>6) d=d+30;  
    if(m>7) d=d+31;  
    if(m>8) d=d+31;  
    if(m>9) d=d+30;  
    if(m>10) d=d+31;  
    if(m>11) d=d+30;  
    cout<<d<<endl; //system("PAUSE");  
    return EXIT_SUCCESS;  
} 

#include<iostream>
using namespace std;
int main()
{
    int a1,a2,a3,a4,a5,max,min,ans;
    cin>>a1>>a2>>a3>>a4>>a5;
    if(a1>a2) max=a1;
    else max=a2;
    if(a3>max) max=a3;
    if(a4>max) max=a4;
    if(a5>max) max=a5; 
    if(a1<a2) min=a1;
    else min=a2;
    if(a3<min) min=a3;
    if(a4<min) min=a4;
    if(a5<min) min=a5;
    ans=min*max;
    cout<<ans; 
}

#include<iostream>
using namespace std;
int main()
{
    int a,b,c,e;
    char d;
    cin>>a>>d>>b>>d>>c;
    e=3600*a+60*b+c;
    cout<<e<<endl;
    cin>>e; 
    a=e/3600; 
    e=e%3600;
    b=e/60;
    e=e%60;
    c=e;
    if(a<10)cout<<"0";
    cout<<a<<d;
    if(b<10)cout<<"0";
    cout<<b<<d;
    if(c<10)cout<<"0";
    cout<<c;
}