Submission #1166476

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Source Code Expand

#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <vector>
#include <cstring>
#include <functional>
#include <queue>
#include <map>
#include <set>
#include <string>
#define INF 1000000000LL

using namespace std;
typedef long long int ll;
typedef pair <int,int> P;

int main()
{
	ll X;
	scanf("%lld",&X);
	ll L=0,R=INF;
	while(R-L>1)
	{
		ll m=(L+R)/2;
		if(m*(m+1)/2LL>=X) R=m;
		else L=m;
	}
	printf("%lld\n",R);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:20:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld",&X);
                  ^

Judge Result