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  1. #include<stdio.h>
  2. int main()
  3. {
  4.     int t;
  5.     int a[200]; //array will have the capacity to store 200 digits.
  6.     int n,i,j,temp,m,x;
  7.  
  8.     scanf("%d",&t);
  9.     while(t--)
  10.     {
  11.        scanf("%d",&n);
  12.        a[0]=1;  //initializes array with only 1 digit, the digit 1.
  13.        m=1;    // initializes digit counter
  14.  
  15.        temp = 0; //Initializes carry variable to 0.
  16.        for(i=1;i<=n;i++)
  17.        {
  18.             for(j=0;j<m;j++)
  19.             {
  20.                x = a[j]*i+temp; //x contains the digit by digit product
  21.                a[j]=x%10; //Contains the digit to store in position j
  22.                temp = x/10; //Contains the carry value that will be stored on later indexes
  23.             }
  24.              while(temp>0) //while loop that will store the carry value on array.
  25.              { 
  26.                a[m]=temp%10;
  27.                temp = temp/10;
  28.                m++; // increments digit counter
  29.              }
  30.       }
  31.               for(i=m-1;i>=0;i--) //printing answer
  32.               printf("%d",a[i]);
  33.               printf("\n");
  34.     }
  35.     return 0;
  36. }
Success #stdin #stdout 0s 9432KB
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https://ideone.com/VfJStj
language:
C (gcc 8.3)
created:
6 years ago
visibility:
public

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