Submission #1177147
Source Code Expand
// AtCoder Regular Contest 070 // C - Go Home #include <cstdio> #define MAX_X ((ll)1e9) using namespace std; typedef long long int ll; ll X; int main() { ll l, r, m, sum; scanf("%lld", &X); // (l, r] l = 0; r = MAX_X; while (r - l > 1) { m = (r + l + 1) / 2; sum = m * (m + 1) / 2; if (sum >= X) { r = m; } else { l = m; } } printf("%lld\n", r); return 0; }
Submission Info
Submission Time | |
---|---|
Task | C - Go Home |
User | scarlet7000 |
Language | C++14 (GCC 5.4.1) |
Score | 200 |
Code Size | 455 Byte |
Status | AC |
Exec Time | 1 ms |
Memory | 128 KB |
Compile Error
./Main.cpp: In function ‘int main()’: ./Main.cpp:16:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld", &X); ^
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 200 / 200 | ||||
Status |
|
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Set Name | Test Cases |
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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 | 1 ms | 128 KB |
0_001.txt | AC | 0 ms | 128 KB |
0_002.txt | AC | 1 ms | 128 KB |
1_003.txt | AC | 1 ms | 128 KB |
1_004.txt | AC | 0 ms | 128 KB |
1_005.txt | AC | 1 ms | 128 KB |
1_006.txt | AC | 0 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 | 1 ms | 128 KB |
1_011.txt | AC | 0 ms | 128 KB |
1_012.txt | AC | 0 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 | 1 ms | 128 KB |