#include<stdio.h>

int main(){

 char a,b,c,d,e;

 a = getchar();

 b = getchar();

 c = getchar();

 d = getchar();

 e = getchar();

 putchar(a);

 putchar(b);

 putchar(c);

 putchar(d);

 putchar(e);

 return 0;

}

#include<stdio.h>

int main()

{

 int year;

 scanf("%d", &year);

 if((year%100 != 0 && year%4 == 0) || year%400 == 0){

  printf("year:%d, day:29\n",year);

 } else  {

  printf("year:%d,day:28\n",year);

 }

 return 0;

}

#include<stdio.h>

int main()

{

 double a,b,c;

 scanf("%lf%lf%lf",&a,&b,&c);

 if((a + b)<=c||(a+c)<=b||(b+c)<=a){

  printf("无法构成三角形");

 } else if (a==b&&b==c){

  printf("构成等边三角形");

 } else if(a==b||a==c||b==c){

  printf("构成等腰三角形");

 } else if((a*a+b*b)==c*c||(a*a+c*c)==b*b||(b*b+c*c)==a*a){

  printf("构成直角三角形");

 } else {

  printf("构成一般三角形");

 } return 0;

}

 

 

 

 

 

 

 

#include<stdio.h>

#include<math.h>

int main(){  

int a;

 double r[5];

 r[0]=0.00;

 r[1]=0.05;

 r[2]=0.08;

 r[3]=0.10;

 r[4]=0.15;

 scanf("%d",&a);

 if(a<500){   printf("a=%d,rate=%lf,tax=%lf,profit=%lf\n",a,r[0],a*r[0],a-a*r[0]);  }

 if(a>=500&&a<1000){   printf("a=%d,rate=%lf,tax=%lf,profit=%lf\n",a,r[1],a*r[1],a-a*r[1]);  }

 if(a>=1000&&a<2000){   printf("a=%d,rate=%lf,tax=%lf,profit=%lf\n",a,r[2],a*r[2],a-a*r[2]);  }

 if(a>=2000&&a<5000){   printf("a=%d,rate=%lf,tax=%lf,profit=%lf\n",a,r[3],a*r[3],a-a*r[3]);  }

 if(a>=5000){   printf("a=%d,rate=%lf,tax=%lf,profit=%lf\n",a,r[4],a*r[4],a-a*r[4]);  }

 return 0; }