Submission #1611926

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Source Code Expand

#include<iostream>
#include<string>
#include<string.h>
#include<algorithm>
#include<stdio.h>
#include<cmath>
#include<vector>
#include<utility>
#include<queue>
#include<stack>
#include<stdlib.h>
#define FOR(i, a, b) for(int i=(a);i<=(b);i++)
#define RFOR(i, a, b) for(int i=(a);i>=(b);i--)
#define MOD 1000000007

using namespace std;


int main(void) {
	char a[4], b[4];
	char p[4], q[4];
	
	cin >> a >> b;
	FOR(i, 0, 2) {
		p[i] = a[i];
		q[i] = b[i];
	}
	p[3] = q[3] = '\0';
	if (a[0] != '9') {
		p[0] = '9';
	}
	else if (a[1] != '9') {
		p[1] = '9';
	}
	else {
		p[2] = '9';
	}
	if (b[0] != '1') {
		q[0] = '1';
	}
	else if (b[1] != '0') {
		q[1] = '0';
	}
	else {
		q[2] = '0';
	}
	if (atoi(p) - atoi(b) >= atoi(a) - atoi(q)) {
		cout << atoi(p) - atoi(b) << endl;
	}
	else {
		cout << atoi(a) - atoi(q) << endl;
	}
	return 0;
}

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