Objective-C solution boilerplate for HackerRank

HackerRank.m

#import <Foundation/Foundation.h>

@interface Solver : NSObject
- (void)findSolutionForInput: (NSArray)input;
@end

@interface Solver()
{
}
@end

@implementation Solver

- (void)findSolutionForInput: (NSArray*)input
{
    NSString *solution = @"Solution!";
    //PRINTING AN NSSTRING
    printf("%s", [solution UTF8String]);
}
@end

int main (int argc, const char * argv[])
{
    @autoreleasepool
    {
        Solver *solver = [[Solver alloc] init];
        
        //GETTING AN INTEGER
        int numberOftestCases;
        scanf("%i", &numberOftestCases);
        
        /* you can also do it with NSInteger like this
            NSInteger testCases;
            scanf("%ld", &testCases);
        */
    
        for (int i=0; i<numberOftestCases; i++)
        {
            NSMutableArray *solutionArray = [NSMutableArray array];
            
            //GETTING A STRING
            int stringLength;
            scanf("%d", &stringLength); //anytime hacker rank is going to give you a string, they'll give you its length fist
            char text[stringLength + 1];
            scanf("%s", text);
            NSString *row = [[NSString alloc] initWithBytes:text length:stringLength encoding:NSUTF8StringEncoding];
            
            [solutionArray addObject: row];
            
            //GETTING SPACE-SEPARATED VALUES ON A SINGLE LINE
            NSInteger first;
            NSInteger second;
            scanf("%ld %ld", &first, &second); //you can do this with int as well, just change the scan f to use %i
        }
    }
    return 0;
}