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#include<bits/stdc++.h>
using namespace std;
int n;
int main()
{
cin>>n;
if((n==1)||(n==3)||(n==5)) cout<<"NO"<<endl;
else cout<<"YES"<<endl;
return 0;
}
#include<bits/stdc++,h>
using namespace std;
int s;
double bike,walk;
int main()
{
cin>>s;
bike=s/3.0+50;
walk=s/1.2;
if(bike==walk) cout<<"All"<<endl;
else if(bike>walk) cout<<"Walk"<<endl;
else cout<<"Bike"<<endl;
return 0;
}
#include<bits/stdc++.h>
using namespace std;
double x,y,t;
int main()
{
cin>>x;
t=int(x)/5.0;
switch(int (t))
{
case 0:
y=(-x)+2.5;
break;
case 1:
y=2-1.5*(x-3)*(x-3);
break;
case 2:
case 3:
y=x/2-1.5;
break;
}
cout<<setiosflags(ios::fixed)<<setprecision(3)<<y<<endl;
return 0;
}
#include<bits/stdc++.h>
using namespace std;
int m,money;
char ch
int main()
{
cin>>m>>ch;
if(m>1000) money=8+ceil((m-1000)/500.0)*4;
else money=8;
if(ch=='y') money=money+5;
cout<<money<<endl;
return 0;
}
#include<bits/stdc++.h>
using namespace std;
int a,b,c,max;
int main()
{
cin>>a>>b>>c;
if(a>b) max=a;
else max=b;
if(c>max) max=c;
cout<<max<<endl;
return 0;
}
#include<bits/stdc++.h>
using namespace std;
int a,b,c;
int main()
{
cin>>a>>b>>c;
if((a+b>c)&&(a+c>b)&&(b+c>a)) cout<<"yes"<<endl;
else cout<<"no"<<endl;
return 0;
}
#include<bits/stdc++.h>
using namespace std;
int a;
int main()
{
cin>>a;
if(a%4==0)
{
if(a%100==0)
{
if(a%400) cout<<"N"<<endl;
else cout<<"Y"<<endl;
}
else cout<<"Y"<<endl;
}
else cout<<"N"<<endl;
return 0;
}
#include<bits/stdc++.h>
using namespace std;
double x,y;
int main()
{
cin>>x>>y;
if( (x>=-1&&x<=1) && (y>=-1&&y<=1) ) cout<<"yes"<<endl;
else cout<<"no"<<endl;
return 0;
}
#include<bits/stdc++.h>
using namespace std;
int a,b;
char ch;
int main()
{
cin>>a>>b>>ch;
if((ch=='+')||(ch=='-')||(ch=='*')||(ch=='/'))
{
switch (ch)
{
case '+':
cout<<a+b<<endl;
break;
case '-':
cout<<a-b<<endl;
break;
case '*':
cout<<a*b<<endl;
break;
case '/':
{
if(b==0) cout<<"Divided by zero!"<<endl;
else cout<<a/b<<endl;
}
}
}
else cout<<"Invalid operator!"<<endl;
return 0;
}
#include<bits/stdc++.h>
#define precision_1 1e-12
#define precision_2 1e-6
using namespace std;
int main()
{
double a,b,c,x1,x2,delta;
cin>>a>>b>>c;
delta=b*b-4*a*c;
if(delta<0&&fabs(delta)>precision_1) printf("No answer!\n");
else if(fabs(delta)<precision_1)
{
x1=-b/(2*a);
if(fabs(x1)<precision_2) printf("x1=x2=%.5lf\n",0);
else printf("x1=x2=%.5lf\n",x1);
}
else
{
x1=(-b+sqrt(delta))/(2*a);
x2=(-b-sqrt(delta))/(2*a);
if(fabs(x1)<precision_2) x1=fabs(x1);
if(fabs(x2)<precision_2) x2=fabs(x2);
if(x1<x2) printf("x1=%.5lf;x2=%.5lf",x1,x2);
else printf("x1=%.5lf;x2=%.5lf",x2,x1);
}
return 0;
}
明天发:
信息学奥赛一本通---第四章---?循环结构的程序设计--- 1059-1084 (第二节)题解
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