算法竞赛入门【码蹄集新手村600题】(MT1001-1050）

#include<stdio.h>
int main() 
{ 
    printf("This is my first program!\n");
     printf("Coding is fun!");
    return 0; 
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int x;
    cin>>x;
    printf("You entered:%d",x);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int x,y;
    scanf("%d,%d",&x,&y);
    printf("%d+%d=%d\n",x,y,x+y);
    printf("%d-%d=%d",x,y,x-y);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int x,y,z,w;
    scanf("%d %d",&x,&y);
    scanf("%d %d",&z,&w);
    printf("%d%%%d=%d\n",x,y,x%y);
    printf("%d%%%d=%d",z,w,z%w);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    float x;
    double y;
    scanf("%f %lf",&x,&y);
    printf("You entered:%.2f and %.3f",x,y);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    double x,y;
    scanf("%lf %lf",&x,&y);
    printf("%.6f*%.6f=%.6f\n",x,y,x*y);
     printf("%.6f/%.6f=%.6f",x,y,x/y);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    double x,y,z;
    scanf("%lf %lf %lf",&x,&y,&z);
    printf("%.6f\n",x+y+z);
    printf("%.6f",(x+y+z)/3);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    double r,h;
    double PI=3.1415926;
    scanf("%lf %lf",&r,&h);
    printf("%.2f\n",2*r*PI);
    printf("%.2f\n",PI*r*r);
    printf("%.2f\n",4*PI*r*r);
    printf("%.2f\n",PI*r*r*r*4/3);
    printf("%.2f\n",PI*r*r*h);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int x,a;
    float y;
    scanf("%d %d",&x,&a);
    y=0.5*(a*x+(a+x)/(4.0*a));
    printf("%.2f",y);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    char a,b;
    scanf("%c,%c",&a,&b);
    printf("The ASCII code of %c is %d\n",a,a);
    printf("The ASCII code of %c is %d",b,b);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    printf("X %d\nA %d",(int)'X',(int)'A');
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    printf("Size of int: %d bytes\n",sizeof(int));
    printf("Size of float: %d bytes\n",sizeof(float));
    printf("Size of double: %d bytes\n",sizeof(double));
    printf("Size of char: %d byte\n",sizeof(char));
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    printf("Size of int = %d bytes\n",sizeof(int));
    printf("Size of long int = %d bytes\n",sizeof(long int));
    printf("Size of long long int = %d bytes\n",sizeof(long long int));
    printf("Size of double = %d bytes\n",sizeof(double));
    printf("Size of long double = %d bytes\n",sizeof(long double));
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int a,b,c;
    scanf("%d/%d/%d",&a,&b,&c);
    printf("%.4d%.2d%.2d",c,a,b);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int a,c;
    char b,d;
    scanf("a=%d,b=%c,c=%d,d=%c",&a,&b,&c,&d);
    printf("%d %c %d %c",a,b,c,d);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int a,c;
    char b,d;
    scanf("a=%d,b=%c,c=%d,d=%c",&a,&b,&c,&d);
    printf("%d %c %d %c",a,b,c,d);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    printf("%-14.6f %14.6f\n",3.141593,3.141593);
    printf("%-14.6f %14.6f\n",22.345600,22.345600);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int a1,a2,a3;
    scanf("%3d%3d%3d",&a1,&a2,&a3);
    printf("%3d %3d %3d",a1,a2,a3);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int m,n;
    cin>>m>>n;
    cout<<setw(m)<<fixed<<setprecision(n)<<18.16054<<" "<<setw(m)<<setprecision(n)<<17.676767<<endl;
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    char str[20];
    cin.getline(str,4);
    cout<<setw(6)<<right<<str<<endl;
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    double a;
    cin >> a;
    cout << fixed << setprecision(6) << a << " " << fixed <<
setprecision(2) << a << " " << fixed << setprecision(3) << setw(8) << a << endl;
    return 0;
}

char str[20];
cin.getline(str,4);
cout<<setw(6)<<right<<str<<ebdl;

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    double a = 3.1415926, b = 12345678.123456789;
    printf("%lf ",a);
    int i;
    for(i=-1;a>1;i++) a/=10;
    printf("%lfe+%03d\n",a*10,i);
    printf("%lf ",b);
    for(i=-1;b>1;i++) b /= 10;
    printf("%lfe+%03d\n",b*10,i);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int a;
    scanf("%d",&a);
    printf("%d %o %x %u\n",a,a,a,a);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int a = 128,b=456789;
    printf("%d %o %X\n",a,a,a);
     printf("%d %o %X\n",b,b,b);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{ 
    int a=202,b=117,c=70,d=130;
    printf("%d %.4o 0X%X\n",a,a,a);
    printf("%d %.4o 0X%X\n",b,b,b);
    printf("%d %.4o 0X%X\n",c,c,c);
    printf("%d %.4o 0X%X\n",d,d,d);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int a,b,c;
    scanf("%d %d %d",&a,&b,&c);
    printf("%d%d%d",a,b,c);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int a,b,c;
    scanf("%d",&a);
    b=a/10;
    c=a%10;
    a=b+c*10;
    printf("%.2d",a);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    char a[4];
    cin>>a;
    for(int i=3;i>=0;i--){
        cout<<a[i];
    }
    cout<<endl;
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int a,num=0;
    scanf("%d",&a);
    if(a==0) num=1;
    while(a){
         a=a/10;
         num++;
    }
    printf("%d",num);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int x=0,y=0,c=0;
    scanf("%d%d",&x,&y);
    c=(x>y)?y:x;
    while((x%c !=0) || (y%c !=0)) c--;
    printf("%d",c);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int a,b;
    scanf("%d/%d",&a,&b);
    int gcd = __gcd(a,b);
    printf("%d/%d",a/gcd,b/gcd);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int a=0,b=0;
    scanf("%d %d\n",&a,&b);
    cout<<(a*b)/__gcd(a,b)<<endl;
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int x,sum;
    scanf("%d",&x);
    sum=pow(x,6)-2*pow(x,5)+3*pow(x,4)-5*pow(x,2)+6*x+7;
    printf("%d",sum);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int n;
    scanf("%d",&n);
    for(int i=4;i<=n;i+=2){
       for(int j=2;j*j<=i;j+=2)
            if(i==j*j) printf("%d\n",i);
    }
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int n;
    scanf("%d",&n);
    for(int i=1;i<=n;i+=2){
       for(int j=1;j*j<=i;j+=2)
            if(i==j*j) printf("%d\n",i);
    }
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int x,y,sum;
    scanf("%d %d",&x,&y);
    sum=x+y;
    sum=pow(sum,3);
    printf("%d",sum);   
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    double a,res;
    scanf("%lf",&a);
    res=abs(a);
    printf("%lf",res);

    //法二
    // if(a<0) a=-a;
    // else if(a==0) a=0;
    // printf("%lf",a); 
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int a,b;
    scanf("%d %d",&a,&b);
    printf("%d %d",b,a);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int n;
    cin>>n;
    int a[100];
    while(n!=0){
        for(int i=0;i<100;i++){
            a[i] = n%2;
            n/=2;
        }
    }
    for(int i=0;i<100;i++){
        if(i%2==0){
            a[i]=0;
        }else continue;
    }
    int temp=0;
    for(int i=0;i<100;i++) temp+=a[i]*pow(2,i);
    cout<<temp<<endl;
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int n;
    cin>>n;
    int a[100];
    while(n!=0){
        for(int i=0;i<100;i++){
            a[i] = n%2;
            n/=2;
        }
    }
    for(int i=0;i<100;i++){
        if(i%2!=0){
            a[i]=0;
        }else continue;
    }
    int temp=0;
    for(int i=0;i<100;i++) temp+=a[i]*pow(2,i);
    cout<<temp<<endl;
    return 0;
}

#include<bits/stdc++.h> 
#define PI 3.1415926
using namespace std;

int main( )
{
    double r;
    scanf("%lf",&r);
    printf("Area=%lf\nCircumference=%lf",PI*r*r,2*PI*r);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    double x,y;
    scanf("%lf %lf",&x,&y);
    printf("Area=%lf\nPerimeter=%lf",x*y,2*(x+y));
    return 0;
}

#include<bits/stdc++.h> 
#define PI 3.1415926
using namespace std;

int main( )
{
    double x,y;
    scanf("%lf %lf",&x,&y);
    printf("Area = %lf",x*PI*y);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    float x,y;
    scanf("%f %f",&x,&y);
    printf("Area=%.2f",x*y/2);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    double x,y;
    scanf("%lf %lf",&x,&y);
    printf("%lf",x*y);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    double x,y;
    scanf("%lf %lf",&x,&y);
    printf("%.2lf",x*y/2);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    double x,y,z;
    scanf("%lf %lf %lf",&x,&y,&z);
    printf("%.2lf",(x+y)*z/2);
    return 0;
}

#include<bits/stdc++.h> 
#define PI 3.1415926
using namespace std;

int main( )
{
    double r,n;
    scanf("%lf %lf",&r,&n);
    printf("%lf",r*r*PI*n/360);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int x1,y1,x2,y2,x3,y3;
    double sum;
    scanf("%d %d %d %d %d %d",&x1,&y1,&x2,&y2,&x3,&y3);
    sum = (double)abs(x1*y2+x2*y3+x3*y1-x1*y3-x2*y1-x3*y2)*1/2;
    printf("%.2f",sum);
    return 0;
}

#include<bits/stdc++.h> 

using namespace std;

int main( )
{
    int x1,x2,x3,y1,y2,y3,z1,z2,z3;
    double a,b,c,p;
    scanf("%d %d %d %d %d %d %d %d %d",&x1,&y1,&z1,&x2,&y2,&z2,&x3,&y3,&z3);
    a=sqrt(pow(x1-x2,2)+pow(y1-y2,2)+pow(z1-z2,2));
    b=sqrt(pow(x1-x3,2)+pow(y1-y3,2)+pow(z1-z3,2));
    c=sqrt(pow(x3-x2,2)+pow(y3-y2,2)+pow(z3-z2,2));
    p=1.0/2*(a+b+c);
    printf("%.2lf",sqrt(p*(p-a)*(p-b)*(p-c)));
    return 0;
}

//海伦公式：s=sqrt(p*(p-a)*(p-b)*(p-c)) p=1.0/2*(a+b+c)