9 条题解

  • 1
    @ 2023-8-21 19:28:03

    #include <stdio.h> int main () { int n; int m=1; double x=0.0; scanf("%d",&n); for (int i=1;i<=n;i++) { m*=i; x+=1.0/m; } printf("%.2f",x); return 0; }

    • 1
      @ 2022-10-4 16:03:17
      #include<stdio.h>
      int main(){
      	
      	float i,term=0,sum=1;
      	int n;
      	scanf("%d",&n);
      	for(i=1;i<=n;i++){
      		sum*=i;
      	
      	term+=1/sum;
      }
      	printf("%.2f",term);
      	
      	
      	return 0;
      }
      
      • @ 2025-8-29 13:53:56

        牛逼

    • 0
      @ 2025-10-2 14:03:08
      #include <stdio.h>
      int main()
      {
          int c=1,b=1,n;
          double a=0;
          scanf("%d",&n);
          while(b<=n){
              c*=b;
              a+=1.0/c;
              b++;
          }printf("%.2f",a);
      }
      
      • 0
        @ 2024-12-12 21:12:11

        #include <stdio.h> int main() { int n; double num=0; scanf("%d",&n);

        for(int i=1;i<=n;i++){ double x=1.0; for(int j=1;j<=i;j++){ x*=j; } num+=1/x; } printf("%.2f",num); return 0;

        }

        • 0
          @ 2024-4-24 22:13:23
          #include <stdio.h>
          int main()
          {
              int sp(int a);
              int a,b;
              scanf("%d",&a);
              double s=0.0;
              b=1;
              while(b<=a)
              {
                  s=s+1.0/sp(b);
                  b++;
              }
              printf("%.2lf",s);
              return 0;
          }
          int sp(int a)
          {
              int i=1,c=1;
              while(i<=a){c=c*i;i++;}
              return c;
          }//
          
          • 0
            @ 2023-10-18 11:52:32

            #include<stdio.h> int main() { int n; double sum=0.00,s=1; scanf("%d",&n); for(int i=1;i<=n;i++){ s*=i; sum+=1/s; } printf("%.2lf",sum); return 0; }

            • 0
              @ 2022-10-26 16:59:04

              #include<iostream> #include<iomanip> using namespace std;

              int main() { int n; cin>>n; int i=1; float b=1.00,sum=0.00; while(i<=n) { b=b*i; sum+=1/b; i++; } cout<<fixed<<setprecision(2)<<sum<<endl;

              return 0; }

              • 0
                @ 2022-10-6 10:48:07

                #include<stdio.h> int main(){ int n; double a=1.0,b=0.0; scanf("%d",&n); for(int i=1.0;i<=n;i++){ a=a*i ,b=b+1/a; } printf("%.2lf",b); return 0; }

                • 0
                  @ 2022-10-3 23:40:47
                  #include <stdio.h>
                  int jiecheng(int k)
                  {
                  	if(k==1) return 1;
                  	else return jiecheng(k-1)*k;
                  }
                  int main()
                  {
                  	int n; 
                  	double sum=0;
                  	scanf("%d",&n);
                  	for(int k=1;k<=n;k++)
                  		{
                  		sum+= 1.0/jiecheng(k);
                  		}
                  	printf("%.2f",sum);	
                  	return 0;
                  }
                  相比只加了一个阶乘(业余玩家写写玩)
                  
                  • 1

                  信息

                  ID
                  34
                  时间
                  1000ms
                  内存
                  128MiB
                  难度
                  6
                  标签
                  递交数
                  4620
                  已通过
                  1474
                  上传者