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#import <objc/objc.h>
#import <objc/Object.h>
#import <Foundation/Foundation.h>
 
@interface Police : NSObject
{}
 
- (NSInteger) minimalCost : (NSArray*)cost junctionInfo:(NSArray*)roads;
 
@end
 
@implementation Police
 
- (NSInteger) minimalCost : (NSArray*)cost junctionInfo:(NSArray*)roads
{
   NSUInteger n = [cost count];
   id *e[][];
   for(int i=0; i<n; i++)
	for(int j=0; j<n; j++)
	  e[i][j] = (BOOL)([roads[i] characterAtIndex:j] == 'Y');
   return 0;
}
 
@end
 
int main()
{
	id *costs = [NSArray arrayWithObjects:1,2,3,4,5];
	id *roads = [NSArray arrayWithObjects:@"NNNYY", @"YNNNN", @"NNNYN", @"NNYNN", "NYNNN"];
 
	return 0;
}

prog.m: In function '-[Police minimalCost:junctionInfo:]':
prog.m:17:8: error: array type has incomplete element type
prog.m:18:4: error: 'for' loop initial declarations are only allowed in C99 mode
prog.m:18:4: note: use option -std=c99 or -std=gnu99 to compile your code
prog.m:19:2: error: 'for' loop initial declarations are only allowed in C99 mode
prog.m:20:4: warning: 'NSArray' may not respond to '-characterAtIndex:'
prog.m:20:4: warning: (Messages without a matching method signature
prog.m:20:4: warning: will be assumed to return 'id' and accept
prog.m:20:4: warning: '...' as arguments.)
prog.m:20:4: error: cannot convert to a pointer type
prog.m:20:51: warning: comparison between pointer and integer
prog.m: In function 'main':
prog.m:28:2: warning: passing argument 1 of 'arrayWithObjects:' makes pointer from integer without a cast
prog.m:28:2: note: expected 'id' but argument is of type 'int'
prog.m:28:14: warning: initialization from incompatible pointer type
prog.m:29:14: warning: initialization from incompatible pointer type

Standard output is empty