Submission #66627

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Source Code Expand

#include<iostream>
#include<cstdio>
using namespace std;
typedef long long ll;

ll gcd(ll x, ll y){
	return x ? gcd(y%x,x) : y;
}

int main(){
	ll x,y,num;
	scanf("%lld/%lld",&x,&y);
	ll g=gcd(x,y);
	x/=g;
	y/=g;

	num=(x*2)/y;
	ll min_min=1,min_max=1000000000000000001L;
	while(min_max-min_min>1){
		ll mid=(min_max+min_min)/2;
		if(2L+mid<num)min_min=mid;
		else min_max=mid;
	}

	//cout<<min_min<<" "<<min_max<<endl;

	ll max_min=1,max_max=1000000000000000001L;
	while(max_max-max_min>1){
		ll mid=(max_max+max_min)/2;
		if(mid>num)max_max=mid;
		else max_min=mid;
	}

	//cout<<max_min<<" "<<max_max<<endl;

	bool ok=false;
	for(ll n=min_max;n<=max_max;n++){
		ll m=(1+n)*n/2-(x*(n/y));
		if(n%y==0 && m<=n && m>0){
			cout<<n<<" "<<m<<endl;
			ok=true;
		}
	}

	if(!ok)cout<<"Impossible"<<endl;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:12:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]

Judge Result