Submission #993518
Source Code Expand
#include <bits/stdc++.h> using namespace std; int main() { int N, M; cin >> N >> M; vector<int> used(1000000, 0), same(M, 0), num(M, 0); for (int i = 0, X; i < N; i++) { cin >> X; num[X % M]++; used[X]++; if (used[X] % 2 == 0) { same[X % M]++; } } long long res = 0; for (int i = 0; i < M; i++) { if (i == (M - i) % M) { res += num[i] / 2; num[i] %= 2; } else { int val = min(num[i], num[(M - i) % M]); if ((num[i] - val) % 2 && (num[(M - i) % M] - val) % 2 && same[i] * 2 > val && same[(M - i) % M] * 2 > val) val--; res += val; num[i] -= val; num[(M - i) % M] -= val; res += min(num[i], same[i] * 2) / 2; num[i] -= min(num[i], same[i] * 2) / 2 * 2; res += min(num[(M - i) % M], same[(M - i) % M] * 2) / 2; num[(M - i) % M] -= min(num[(M - i) % M], same[(M - i) % M] * 2) / 2 * 2; } } cout << res << endl; return 0; }
Submission Info
Submission Time | |
---|---|
Task | D - Pair Cards |
User | kazuma |
Language | C++14 (GCC 5.4.1) |
Score | 0 |
Code Size | 921 Byte |
Status | WA |
Exec Time | 38 ms |
Memory | 4992 KB |
Judge Result
Set Name | sample | all | ||||||
---|---|---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 0 / 700 | ||||||
Status |
|
|
Set Name | Test Cases |
---|---|
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 |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
01-01.txt | AC | 7 ms | 4096 KB |
01-02.txt | AC | 35 ms | 4096 KB |
01-03.txt | AC | 35 ms | 4096 KB |
01-04.txt | AC | 35 ms | 4096 KB |
01-05.txt | AC | 35 ms | 4096 KB |
01-06.txt | AC | 35 ms | 4096 KB |
01-07.txt | AC | 35 ms | 4096 KB |
01-08.txt | AC | 35 ms | 4096 KB |
01-09.txt | AC | 36 ms | 4224 KB |
01-10.txt | WA | 37 ms | 4480 KB |
01-11.txt | AC | 38 ms | 4992 KB |
01-12.txt | AC | 36 ms | 4096 KB |
01-13.txt | AC | 37 ms | 4480 KB |
01-14.txt | AC | 35 ms | 4096 KB |
01-15.txt | AC | 35 ms | 4096 KB |
01-16.txt | AC | 35 ms | 4096 KB |
01-17.txt | AC | 35 ms | 4096 KB |
01-18.txt | AC | 35 ms | 4224 KB |
01-19.txt | AC | 35 ms | 4224 KB |
01-20.txt | AC | 37 ms | 4992 KB |
01-21.txt | AC | 36 ms | 4096 KB |
01-22.txt | AC | 36 ms | 4096 KB |
01-23.txt | AC | 36 ms | 4096 KB |
01-24.txt | WA | 37 ms | 4224 KB |
01-25.txt | WA | 37 ms | 4352 KB |
01-26.txt | AC | 38 ms | 4992 KB |
01-27.txt | AC | 23 ms | 4992 KB |
01-28.txt | AC | 10 ms | 4992 KB |
01-29.txt | AC | 8 ms | 4480 KB |
01-30.txt | AC | 9 ms | 4992 KB |
sample-01.txt | AC | 7 ms | 4096 KB |
sample-02.txt | AC | 7 ms | 4096 KB |