Submission #1449642

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Source Code Expand

#include <cstdio>
#include <cstring>
#include <cmath>
#include <algorithm>
#include <vector>
#include <string>
#include <map>
#include <set>
#include <cassert>
using namespace std;
#define rep(i,a,n) for (int i=a;i<n;i++)
#define per(i,a,n) for (int i=n-1;i>=a;i--)
#define pb push_back
#define mp make_pair
#define all(x) (x).begin(),(x).end()
#define fi first
#define se second
#define SZ(x) ((int)(x).size())
typedef vector<int> VI;
typedef long long ll;
typedef pair<int,int> PII;
const ll mod=1000000007;
ll powmod(ll a,ll b) {ll res=1;a%=mod; assert(b>=0); for(;b;b>>=1){if(b&1)res=res*a%mod;a=a*a%mod;}return res;}
// head

int n,k,g[101000];
int main() {
	scanf("%d%d",&n,&k);
	rep(i,0,n) scanf("%d",g+i);
	sort(g,g+n);
	if (g[0]==g[n-1]) {
		puts(g[0]==k?"POSSIBLE":"IMPOSSIBLE");
		return 0;
	}
	int d=g[n-1]-g[0];
	rep(i,0,n-1) if (g[n-1]!=g[i]) d=__gcd(d,g[n-1]-g[i]);
	if (k<=g[n-1]&&(g[n-1]-k)%d==0) puts("POSSIBLE");
	else puts("IMPOSSIBLE");
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:28:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&k);
                     ^
./Main.cpp:29:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  rep(i,0,n) scanf("%d",g+i);
                            ^

Judge Result