Submission #1152855
Source Code Expand
#include <bits/stdc++.h> using namespace std; const int N = 1E5 + 10; int n, m; int _pair[N], mod[N], a[N]; int main() { scanf("%d%d", &n, &m); for (int i = 1; i <= n; i++) { scanf("%d", a + i); mod[a[i] % m]++; } sort(a + 1, a + 1 + n); for (int i = 1; i <= n; i++) { int pt = i; while (a[pt] == a[i] && pt <= n) pt++; _pair[a[i] % m] += (pt - i) / 2; i = pt - 1; } int ans = 0; for (int i = 0; i < m; i++) { if (i > m - i) break; int u = mod[i] - _pair[i] * 2, v = mod[m - i] - _pair[m - i] * 2; if (i == m - i || i == 0) { ans += _pair[i] + u / 2; } else { int mu = mod[i], mv = mod[m - i]; if (u < v) swap(u, v), swap(mu, mv); ans += v + min(u - v, mv - v) + (mv - v - min(u - v, mv - v)) / 2 + (mu - u) / 2; } } printf("%d\n", ans); return 0; }
Submission Info
Submission Time | |
---|---|
Task | D - Pair Cards |
User | kakapo2000 |
Language | C++14 (GCC 5.4.1) |
Score | 700 |
Code Size | 877 Byte |
Status | AC |
Exec Time | 19 ms |
Memory | 1408 KB |
Compile Error
./Main.cpp: In function ‘int main()’: ./Main.cpp:10:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ ./Main.cpp:12:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", a + i); ^
Judge Result
Set Name | sample | all | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 700 / 700 | ||||
Status |
|
|
Set Name | Test Cases |
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sample | sample-01.txt, sample-02.txt |
all | sample-01.txt, sample-02.txt, 01-01.txt, 01-02.txt, 01-03.txt, 01-04.txt, 01-05.txt, 01-06.txt, 01-07.txt, 01-08.txt, 01-09.txt, 01-10.txt, 01-11.txt, 01-12.txt, 01-13.txt, 01-14.txt, 01-15.txt, 01-16.txt, 01-17.txt, 01-18.txt, 01-19.txt, 01-20.txt, 01-21.txt, 01-22.txt, 01-23.txt, 01-24.txt, 01-25.txt, 01-26.txt, 01-27.txt, 01-28.txt, 01-29.txt, 01-30.txt, sample-01.txt, sample-02.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
01-01.txt | AC | 1 ms | 256 KB |
01-02.txt | AC | 17 ms | 640 KB |
01-03.txt | AC | 18 ms | 640 KB |
01-04.txt | AC | 17 ms | 640 KB |
01-05.txt | AC | 17 ms | 640 KB |
01-06.txt | AC | 18 ms | 640 KB |
01-07.txt | AC | 18 ms | 640 KB |
01-08.txt | AC | 17 ms | 640 KB |
01-09.txt | AC | 17 ms | 640 KB |
01-10.txt | AC | 18 ms | 896 KB |
01-11.txt | AC | 19 ms | 1408 KB |
01-12.txt | AC | 12 ms | 640 KB |
01-13.txt | AC | 12 ms | 640 KB |
01-14.txt | AC | 17 ms | 640 KB |
01-15.txt | AC | 17 ms | 640 KB |
01-16.txt | AC | 17 ms | 640 KB |
01-17.txt | AC | 17 ms | 640 KB |
01-18.txt | AC | 17 ms | 640 KB |
01-19.txt | AC | 17 ms | 768 KB |
01-20.txt | AC | 19 ms | 1408 KB |
01-21.txt | AC | 16 ms | 640 KB |
01-22.txt | AC | 16 ms | 640 KB |
01-23.txt | AC | 16 ms | 640 KB |
01-24.txt | AC | 16 ms | 640 KB |
01-25.txt | AC | 16 ms | 896 KB |
01-26.txt | AC | 17 ms | 1408 KB |
01-27.txt | AC | 10 ms | 896 KB |
01-28.txt | AC | 2 ms | 1024 KB |
01-29.txt | AC | 2 ms | 512 KB |
01-30.txt | AC | 2 ms | 384 KB |
sample-01.txt | AC | 1 ms | 256 KB |
sample-02.txt | AC | 1 ms | 256 KB |