1 solutions

  • 0
    @ 2025-11-5 15:16:05

    C :

    #include "stdio.h"
     
    int main()
    {
        int a,b;
        int EX=5,EY=3,DX=2,DY=3,EXY=0;/*对任意X,Y有D(X+Y)=D(X)+D(Y)+2cov(X,Y)
    	又求cov(X,Y)=E(XY)-E(X)E(Y);D(2X-3Y)=4*DX+9*DY+2*(-6E(XY)+6*E(X)E(Y))的值*/ 
        while(scanf("%d",&a) != EOF)
     {
     if (a==1)
       b=4*DX+9*DY+2*(-6*EXY+6*EX*EY);  
     else if (a==0)   
        b=1;
         printf("%d\n",b);	
     
      }
        return 0;
    }
    
    

    C++ :

    #include<stdio.h>
    #include<iostream>
    using namespace std;
    int main(){
    	int a;
    	int b=5;int c=3; int d=2;int e=3;int f=0;
    	scanf("%d",&a);
    	if(a==0) printf("%d",1);
    	else printf("%d",4*d+9*e+12*15);
    	return 0;
    }
    

    Java :

    import java.util.*;
    public class Main {
    	public static void main(String args[]) {
    		Scanner cin = new Scanner(System.in);
    		int a;
    		int b;
    		while (cin.hasNext()) {
    			a = cin.nextInt(); 
    			if (a==1){
    System.out.printf("215\n");
       
    }
    else if (a==0){
    System.out.printf("1\n");}
    }
    	}	}
    
    • 1

    Information

    ID
    16586
    Time
    1000ms
    Memory
    128MiB
    Difficulty
    (None)
    Tags
    # Submissions
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