Freshman's Database

input/code.cpp: In function 'int main()':
input/code.cpp:17:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d", &database[i]);
                             ^

#include <iostream>
#include <string.h>
#include <cstdio>
#include <cmath>
#include <algorithm>
using namespace std;
const int MAX=1e6+5;

int main()
{
	ios::sync_with_stdio(0);
	int database[MAX];
	int num, ans;
	while(scanf("%d", &num)!=EOF){
		ans=0;
		for(int i=0; i<num; i++)
			scanf("%d", &database[i]);
		for(int i=0; i<num-1; ){
			if(database[i+1]==database[i]-1){
				ans+=1;
				i+=2;
			}
			else if(database[i+1]==database[i]+1){
				int tmpIndex = i;
				while(database[i+1]==database[i]+1 && i<num-2){
					i++;
				}
				if(database[i+1]==database[tmpIndex]-1){
					ans+=1;
					i+=2;
				}
			}
			else
				i++;
		}
		printf("%d\n", ans);
	}	

	return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: WRONG ANSWER

Test 4

Verdict: WRONG ANSWER

Test 5

Verdict: WRONG ANSWER

Test 6

Verdict: WRONG ANSWER

Test 7

Verdict: WRONG ANSWER

Test 8

Verdict: WRONG ANSWER

Test 9

Verdict: WRONG ANSWER

Test 10

Verdict: WRONG ANSWER