Submission #1167078


Source Code Expand

#include <cstdio>

typedef long long LL;

int main()
{
	LL X; scanf("%lld", &X);
	LL L = 0, R = X;
	while(L < R) {
		LL M = (L + R + 1) / 2;
		if(M * (M + 1) / 2 <= X) L = M;
		else R = M - 1;
	}

	if(L * (L + 1) / 2 == X) { printf("%lld\n", L); return 0; }
	printf("%lld\n", L + 1);

	return 0;
}

Submission Info

Submission Time
Task C - Go Home
User AOQNRMGYXLMV
Language C++14 (GCC 5.4.1)
Score 200
Code Size 315 Byte
Status AC
Exec Time 1 ms
Memory 128 KB

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:7:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  LL X; scanf("%lld", &X);
                         ^

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 200 / 200
Status
AC × 3
AC × 18
Set Name Test Cases
Sample 0_000.txt, 0_001.txt, 0_002.txt
All 0_000.txt, 0_001.txt, 0_002.txt, 1_003.txt, 1_004.txt, 1_005.txt, 1_006.txt, 1_007.txt, 1_008.txt, 1_009.txt, 1_010.txt, 1_011.txt, 1_012.txt, 1_013.txt, 1_014.txt, 1_015.txt, 1_016.txt, 1_017.txt
Case Name Status Exec Time Memory
0_000.txt AC 0 ms 128 KB
0_001.txt AC 0 ms 128 KB
0_002.txt AC 0 ms 128 KB
1_003.txt AC 1 ms 128 KB
1_004.txt AC 0 ms 128 KB
1_005.txt AC 0 ms 128 KB
1_006.txt AC 1 ms 128 KB
1_007.txt AC 0 ms 128 KB
1_008.txt AC 0 ms 128 KB
1_009.txt AC 1 ms 128 KB
1_010.txt AC 0 ms 128 KB
1_011.txt AC 0 ms 128 KB
1_012.txt AC 1 ms 128 KB
1_013.txt AC 1 ms 128 KB
1_014.txt AC 1 ms 128 KB
1_015.txt AC 1 ms 128 KB
1_016.txt AC 0 ms 128 KB
1_017.txt AC 0 ms 128 KB