C program to find the array of integers contain a duplicate number

#include <stdio.h> 
 #include <conio.h> 
 int main() 
 { 
     int array1 [10], i, number , j, flag=0; 
     clrscr (); 
     printf("\n Enter the size of the array:"); 
     scanf ("%d", &number); 
     for(i=0;i<number;i++) 
        { 
            scanf("%d", &array1[i]); 
        } 
     for(i=0;i<number;i++) 
        { 
           for(j= i+1;j<number;j++) 
              { 
                 if(array1[i] == array1[j] && i!=j) 
                   { 
                        flag=1; 
                        printf("\n Duplicate number %d found at location %d and %d", array1 [i],i, j); 
                   } 
             } 
       } 
        if (flag==60) 
           { 
                printf ("\n No Duplicate"); 
           } 
           return 0; 
 }