Language: C

c[5004],d[5004],m,t,u,i,f="%d\n";main(x){for(scanf("%d%*d",c);i<*a;scanf(f,++i+c));for(;~scanf(f,&x);)for(u=i=t=0;i++<*c;t=d[i],d[i]=m<u?m=u:u)u=x-c[i]?u:t+1;m=!printf(f,m);}

Compiler output:
main.c:1:1: warning: data definition has no type or storage class
    1 | c[5004],d[5004],m,t,u,i,f="%d\n";main(x){for(scanf("%d%*d",c);i<*a;scanf(f,++i+c));for(;~scanf(f,&x);)for(u=i=t=0;i++<*c;t=d[i],d[i]=m<u?m=u:u)u=x-c[i]?u:t+1;m=!printf(f,m);}
      | ^
main.c:1:1: error: type defaults to 'int' in declaration of 'c' [-Wimplicit-int]
main.c:1:9: error: type defaults to 'int' in declaration of 'd' [-Wimplicit-int]
    1 | c[5004],d[5004],m,t,u,i,f="%d\n";main(x){for(scanf("%d%*d",c);i<*a;scanf(f,++i+c));for(;~scanf(f,&x);)for(u=i=t=0;i++<*c;t=d[i],d[i]=m<u?m=u:u)u=x-c[i]?u:t+1;m=!printf(f,m);}
      |         ^
main.c:1:17: error: type defaults to 'int' in declaration of 'm' [-Wimplicit-int]
    1 | c[5004],d[5004],m,t,u,i,f="%d\n";main(x){for(scanf("%d%*d",c);i<*a;scanf(f,++i+c));for(;~scanf(f,&x);)for(u=i=t=0;i++<*c;t=d[i],d[i]=m<u?m=u:u)u=x-c[i]?u:t+1;m=!printf(f,m);}
      |                 ^
main.c:1:19: error: type defaults to 'int' in declaration of 't' [-Wimplicit-int]
    1 | c[5004],d[5004],m,t,u,i,f="%d\n";main(x){for(scanf("%d%*d",c);i<*a;scanf(f,++i+c));for(;~scanf(f,&x);)for(u=i=t=0;i++<*c;t=d[i],d[i]=m<u?m=u:u)u=x-c[i]?u:t+1;m=!printf(f,m);}
      |                   ^
main.c:1:21: error: type defaults to 'int' in declaration of 'u' [-Wimplicit-int]
    1 | c[5004],d[5004],m,t,u,i,f="%d\n";main(x){for(scanf("%d%*d",c);i<*a;scanf(f,++i+c));for(;~scanf(f,&x);)for(u=i=t=0;i++<*c;t=d[i],d[i]=m<u?m=u:u)u=x-c[i]?u:t+1;m=!printf(f,m);}
      |                     ^
main.c:1:23: error: type defaults to 'int' in declaration of 'i' [-Wimplicit-int]
    1 | c[5004],d[5004],m,t,u,i,f="%d\n";main(x){for(scanf("%d%*d",c);i<*a;scanf(f,++i+c));for(;~scanf(f,&x);)for(u=i=t=0;i++<*c;t=d[i],d[i]=m<u?m=u:u)u=x-c[i]?u:t+1;m=!printf(f,m);}
      |                       ^
main.c:1:25: error: type defaults to 'int' in declaration of 'f' [-Wimplicit-int]
    1 | c[5004],d[5004],m,t,u,i,f="%d\n";main(x){for(scanf("%d%*d",c);i<*a;scanf(f,++i+c));for(;~scanf(f,&x);)for(u=i=t=0;i++<*c;t=d[i],d[i]=m<u?m=u:u)u=x-c[i]?u:t+1;m=!printf(f,m);}
      |                         ^
main.c:1:27: error: initialization of 'int' from 'char *' makes integer from pointer without a cast [-Wint-conversion]
    1 | c[5004],d[5004],m,t,u,i,f="%d\n";main(x){for(scanf("%d%*d",c);i<*a;scanf(f,++i+c));for(;~scanf(f,&x);)for(u=i=t=0;i++<*c;t=d[i],d[i]=m<u?m=u:u)u=x-c[i]?u:t+1;m=!printf(f,m);}
      |                           ^~~~~~
main.c:1:27: error: initializer element is not computable at load time
main.c:1:34: error: return type defaults to 'int' [-Wimplicit-int]
    1 | c[5004],d[5004],m,t,u,i,f="%d\n";main(x){for(scanf("%d%*d",c);i<*a;scanf(f,++i+c));for(;~scanf(f,&x);)for(u=i=t=0;i++<*c;t=d[i],d[i]=m<u?m=u:u)u=x-c[i]?u:t+1;m=!printf(f,m);}
      |                                  ^~~~
main.c: In function 'main':
main.c:1:34: error: type of 'x' defaults to 'int' [-Wimplicit-int]
main.c:1:46: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    1 | c[5004],d[5004],m,t,u,i,f="%d\n";main(x){for(scanf("%d%*d",c);i<*a;scanf(f,++i+c));for(;~scanf(f,&x);)for(u=i=t=0;i++<*c;t=d[i],d[i]=m<u?m=u:u)u=x-c[i]?u:t+1;m=!printf(f,m);}
      |                                              ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | c[5004],d[5004],m,t,u,i,f="%d\n";main(x){for(scanf("%d%*d",c);i<*a;scanf(f,++i+c));for(;~scanf(f,&x);)for(u=i=t=0;i++<*c;t=d[i],d[i]=m<u?m=u:u)u=x-c[i]?u:t+1;m=!printf(f,m);}
main.c:1:46: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    1 | c[5004],d[5004],m,t,u,i,f="%d\n";main(x){for(scanf("%d%*d",c);i<*a;scanf(f,++i+c));for(;~scanf(f,&x);)for(u=i=t=0;i++<*c;t=d[i],d[i]=m<u?m=u:u)u=x-c[i]?u:t+1;m=!printf(f,m);}
      |                                              ^~~~~
main.c:1:46: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:1:66: error: 'a' undeclared (first use in this function)
    1 | c[5004],d[5004],m,t,u,i,f="%d\n";main(x){for(scanf("%d%*d",c);i<*a;scanf(f,++i+c));for(;~scanf(f,&x);)for(u=i=t=0;i++<*c;t=d[i],d[i]=m<u?m=u:u)u=x-c[i]?u:t+1;m=!printf(f,m);}
      |                                                                  ^
main.c:1:66: note: each undeclared identifier is reported only once for each function it appears in
main.c:1:74: error: passing argument 1 of 'scanf' makes pointer from integer without a cast [-Wint-conversion]
    1 | c[5004],d[5004],m,t,u,i,f="%d\n";main(x){for(scanf("%d%*d",c);i<*a;scanf(f,++i+c));for(;~scanf(f,&x);)for(u=i=t=0;i++<*c;t=d[i],d[i]=m<u?m=u:u)u=x-c[i]?u:t+1;m=!printf(f,m);}
      |                                                                          ^
      |                                                                          |
      |                                                                          int
main.c:1:74: note: expected 'const char *' but argument is of type 'int'
main.c:1:90: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    1 | c[5004],d[5004],m,t,u,i,f="%d\n";main(x){for(scanf("%d%*d",c);i<*a;scanf(f,++i+c));for(;~scanf(f,&x);)for(u=i=t=0;i++<*c;t=d[i],d[i]=m<u?m=u:u)u=x-c[i]?u:t+1;m=!printf(f,m);}
      |                                                                                          ^~~~~
main.c:1:90: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:1:96: error: passing argument 1 of 'scanf' makes pointer from integer without a cast [-Wint-conversion]
    1 | c[5004],d[5004],m,t,u,i,f="%d\n";main(x){for(scanf("%d%*d",c);i<*a;scanf(f,++i+c));for(;~scanf(f,&x);)for(u=i=t=0;i++<*c;t=d[i],d[i]=m<u?m=u:u)u=x-c[i]?u:t+1;m=!printf(f,m);}
      |                                                                                                ^
      |                                                                                                |
      |                                                                                                int
main.c:1:96: note: expected 'const char *' but argument is of type 'int'
main.c:1:162: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
    1 | c[5004],d[5004],m,t,u,i,f="%d\n";main(x){for(scanf("%d%*d",c);i<*a;scanf(f,++i+c));for(;~scanf(f,&x);)for(u=i=t=0;i++<*c;t=d[i],d[i]=m<u?m=u:u)u=x-c[i]?u:t+1;m=!printf(f,m);}
      |                                                                                                                                                                  ^~~~~~
main.c:1:162: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:1:162: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:1:162: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:1:169: error: passing argument 1 of 'printf' makes pointer from integer without a cast [-Wint-conversion]
    1 | c[5004],d[5004],m,t,u,i,f="%d\n";main(x){for(scanf("%d%*d",c);i<*a;scanf(f,++i+c));for(;~scanf(f,&x);)for(u=i=t=0;i++<*c;t=d[i],d[i]=m<u?m=u:u)u=x-c[i]?u:t+1;m=!printf(f,m);}
      |                                                                                                                                                                         ^
      |                                                                                                                                                                         |
      |                                                                                                                                                                         int
main.c:1:169: note: expected 'const char *' but argument is of type 'int'