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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. int main()
  5. {
  6.     int n,temp;
  7.     scanf("%d",&n);
  8.     if (n==1)
  9.     {
  10.         int l;
  11.         scanf("%d",l);
  12.         printf("Yes");
  13.     }
  14.     else
  15. {
  16.     int a,b;
  17.     int last;
  18.     int changes =0;
  19.     int dec =0 , inc =0; //flag: checking if the set is incremental or decremental till now
  20.     scanf("%d %d",&a,&b);
  21.  
  22.     if (a>b)
  23.     {
  24.         dec=1;
  25.     }
  26.     else if (a<b)
  27.     {
  28.         inc = 1;
  29.     }
  30.     else
  31.     {
  32.         inc =1;
  33.         dec = 1;
  34.     }
  35.     last = b;
  36.     for (int i =2;i<n;i++)
  37.     {
  38.  
  39.         scanf("%d",&temp);
  40.         if (temp>last && dec==1)
  41.         {
  42.             inc = 1;
  43.             dec= 0;
  44.             changes++;
  45.         }
  46.         if (temp<last && inc==1)
  47.         {
  48.             inc =0;
  49.             dec=1;
  50.             changes++;
  51.         }
  52.         last = temp;
  53.     }
  54.     if (changes <=1)
  55.     {
  56.  
  57.         printf("Yes");
  58.     }
  59.     else
  60.     {
  61.         printf("No");
  62.     }
  63. }
  64.     return 0;
  65. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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5
534565463 654645645 798956554 860554521 1
compilation info 
prog.c: In function ‘main’:
prog.c:11:17: error: format ‘%d’ expects argument of type ‘int *’, but argument 2 has type ‘int’ [-Werror=format=]
         scanf("%d",l);
                 ^
prog.c:11:9: error: ‘l’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
         scanf("%d",l);
         ^~~~~~~~~~~~~
cc1: all warnings being treated as errors
stdout
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Standard output is empty
https://ideone.com/MKq3WK
language:
C99 (gcc 8.3)
created:
6 years ago
visibility:
public

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