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#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <time.h>

#ifdef ENABLE_LOG 
	void printFormatted(const char* format, ...);

	#define LOG(TAG, ...) {\
                	char buffer[256];\
                	time_t now = time(0);\
                	struct tm* timeVal = gmtime(&now);\
                	strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", timeVal);\
                	printFormatted("%s| %s:%d: %s ", buffer, __FILE__, __LINE__, TAG);\
                	printFormatted(__VA_ARGS__);\
        	        printFormatted("\n");\
        	}

	FILE* initLogIfNecessary() {
        	static FILE* fp = NULL;
        	if(fp == NULL) {
        	        fp=fopen("log.txt", "a");
        	        if(fp == NULL) {
        	                fprintf(stderr, ("Unable to open log file.\n"));
        	                return NULL;
        	        }
        	        printFormatted("Compiled on %s %s\n", __DATE__, __TIME__);
        	}
        	return fp;
	}

	void printFormatted(const char * format, ... ) {
        	FILE* logFile = initLogIfNecessary();
        	va_list args;
        	va_start (args, format);
        	vfprintf (logFile, format, args);
        	va_end (args);
        	fflush(logFile);
	}
#else
	#define LOG(TAG, ...) 
#endif

unsigned long long squares[10];

void setSquareValue(char c, unsigned long long value) {
	int i = c - '0';
	squares[i] = value;
}

int getSquareValue(char c) {
	int i = c - '0';
	return squares[i];
}

void initSquares() {
	setSquareValue('0', 0);
	setSquareValue('1', 1);
	setSquareValue('2', 4);
	setSquareValue('3', 9);
	setSquareValue('4', 16);
	setSquareValue('5', 25);
	setSquareValue('6', 36);
	setSquareValue('7', 49);
	setSquareValue('8', 64);
	setSquareValue('9', 81);

}

void helloWorldFunction() {
	LOG(__FUNCTION__, "HelloWorld\n");
}

unsigned long long suchNumbersCount = 0;
unsigned long long prefilteredCount= 0;

void processCandidate(unsigned long long candidate, unsigned long long factor) {
	char buffer[32];
	unsigned long long i = 0;
	memset(buffer, '0', sizeof(buffer));
	sprintf(buffer, "%llu",candidate);
	unsigned long long squareSum = 0;
	char c = '\0';
	do {
		c = buffer[i];
		if(c >= '0' && c <= '9') {
			squareSum += getSquareValue(c);
		}
		i++;
	}
	while(c != '\0');
	unsigned long long fN = squareSum * factor;
	LOG(__FUNCTION__, "f(n) = %llu",fN);
	if(squareSum * factor == candidate) {
		LOG(__FUNCTION__,"SuchNumber is : %llu",candidate);
		suchNumbersCount ++;
	}
	prefilteredCount ++;
}

void findFactors2(unsigned long long k, unsigned long long a, unsigned long long b) {
	LOG(__FUNCTION__, "(%llu,%llu,%llu)", k, a, b);
        unsigned long long i = 0;
	unsigned long long j = (a/k)*k;
		if(j != a) {
				j += k;
		}	
        for (i = j; i <= b; i = i + k) {
                processCandidate(i, k);
		LOG(__FUNCTION__,"Candidate: %llu",i);                
        }
}

void findFactors3(unsigned long long k, unsigned long long a, unsigned long long b) {
        unsigned long long i = 0;
		i = a;
		unsigned long long val;
		do {
			val = i%k;
			i++;
		}
		while(val != 0);
		a = i - 1;
        for (i = a; i <= b; i = i + k) {
              //  if(i%k == 0) {
                        processCandidate(i, k);
			LOG(__FUNCTION__,"Candidate: %llu",i);
                //}
        }
}

void findFactors(unsigned long long k, unsigned long long a, unsigned long long b) {
        unsigned long long i = 0;
        for (i = a; i <= b; i++) {
              //  if(i%k == 0) {
                        processCandidate(i, k);
			LOG(__FUNCTION__,"Candidate: %llu",i);
                //}
        }
}



#ifndef UNIT_TEST
int main(int argc, char* argv) {
	initSquares();
	unsigned long long k, a, b;
	scanf("%llu %llu %llu", &k, &a, &b);
	LOG(__FUNCTION__,"Read values: %llu, %llu, %llu", k, a, b);
	findFactors3(k,a,b);
	printf("%llu\n", suchNumbersCount);
	LOG(__FUNCTION__,"Total count is %llu, prefiltered = %llu",prefilteredCount,suchNumbersCount);
}
#endif