1209

#include<stdio.h>
#include<math.h>
int main(void)
{
    double x1,x2,y1,y2,a,b,c,d;

    while(scanf("%lf %lf %lf %lf",&x1,&y1,&x2,&y2)!=EOF){
        a=(x1-x2)*(x1-x2);
        b=(y1-y2)*(y1-y2);
        c=a+b;
        d=sqrt(c);
        printf("%.2f
",d);
    }
    return 0;
}

#include<stdio.h>
int main(void)
{
    int r,x,y,z,count=0;
    scanf("%d",&r);
    for(z=r;z!=x,z!=y,z>=5;z--){
        for(y=1;y<=r;y++){
            for(x=y+1;x<=r;x++){
                if((x*x+y*y==z*z)&&(x+y>z))
                    count++;
            }
        }
    }
    printf("%d
",count);
    return 0;
}

#include<stdio.h>
int main(void)
{
    int a,b,c,d;
    scanf("%d %d %d %d",&a,&b,&c,&d);
    printf("%d %d %d
",a,b,c);
    printf("%d %d %d
",a,c,b);
    printf("%d %d %d
",b,a,c);
    printf("%d %d %d
",b,c,a);
    printf("%d %d %d
",c,a,b);
    printf("%d %d %d
",c,b,a);
    printf("%d %d %d
",a,b,d);
    printf("%d %d %d
",a,d,b);
    printf("%d %d %d
",b,a,d);
    printf("%d %d %d
",b,d,a);
    printf("%d %d %d
",d,a,b);
    printf("%d %d %d
",d,b,a);
    printf("%d %d %d
",a,c,d);
    printf("%d %d %d
",a,d,c);
    printf("%d %d %d
",c,a,d);
    printf("%d %d %d
",c,d,a);
    printf("%d %d %d
",d,a,c);
    printf("%d %d %d
",d,c,a);
    printf("%d %d %d
",b,c,d);
    printf("%d %d %d
",b,d,c);
    printf("%d %d %d
",c,b,d);
    printf("%d %d %d
",c,d,b);
    printf("%d %d %d
",d,b,c);
    printf("%d %d %d
",d,c,b);

    return 0;
}

#include <stdio.h>
#include<string.h>
int main(void)
{    
    char stext[300],*p=stext;    
    gets(stext);
    int len=strlen(stext);
    char lastChar=stext[len-1];
    stext[len-1]='';
    while(*p) 
        p++;    
    for(p--;p>stext;p--){        
        if(*p==' '){
            printf("%s ",p+1);            
            *p='';
        }
    }
    printf("%s",stext);
    printf("%c
",lastChar);
    return 0;
}

#include<stdio.h> 
#include<math.h> 
int main(void) 
{ 
    double money,year,rate,sum; 
    scanf("%lf %lf %lf",&money,&year,&rate); 
    sum=money*pow(1+rate,year); 
    printf("%.1f
",sum); 
    return 0;  
}

#include<stdio.h>
int main(void)
{
    double x,y,z,s;
    scanf("%lf %lf",&x,&y);
    z=x*x+y*y;
    s=4.5*4.5;
    if(z<s)
        printf("in");
    else if(z>s)
        printf("out");
    else
        printf("on");
    return 0;
}

#include<stdio.h>
int main(void)
{
    int n,y;
    scanf("%d",&n);
    if(n<=160){
        y=n*10;
    }
    else{
        y=1600+(n-160)*30;
    }
    printf("%d
",y);
    return 0;
}

#include <stdio.h> 
int main(void) 
{     
    int i;     
    float M=0,N=0,sum=0;     
    scanf("%f %f",&M,&N);     
    sum=M;     
    if(N==1){            
        M=M/2; 
    } 
    else{        
        for(i=2;i<=N;i++){             
            sum+=M;             
            M=M/2; 
        } 
    } 
    M=M/2;        
    printf("%.2f %.2f",M,sum);     
    return 0; 
}