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  1. #include <stdio.h>
  2. #define size 1000
  3.  
  4. int main() {
  5.     int t;
  6.     scanf("%d", &t);
  7.  
  8.     for(int test = 0; test < t; test++) {
  9.         int n, arr[size];
  10.         scanf("%d", &n);
  11.  
  12.         for(int i = 0; i < n; i++) {
  13.             scanf("%d", &arr[i]);
  14.         }
  15.  
  16.         int c = 0;  // duplicate flag
  17.  
  18.         for(int i = 0; i < n; i++) {
  19.             int f = 0;
  20.             for(int j = 0; j < n; j++) {
  21.                 if(arr[i] == arr[j]) {
  22.                     f++;
  23.                 }
  24.                 if(f > 1) {
  25.                     c = 1;
  26.                     break;
  27.                 }
  28.             }
  29.             if(c == 1) break;
  30.         }
  31.  
  32.         if(c == 1) {
  33.             printf("NO\n");
  34.         } else {
  35.             printf("YES\n");
  36.         }
  37.     }
  38.     return 0;
  39. }
  40.  
Success #stdin #stdout 0.01s 5288KB
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YES
https://ideone.com/S9Mqp7
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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