Submission #992695
Source Code Expand
#include <bits/stdc++.h> using namespace std; int main() { int N, M; cin >> N >> M; map<int,int> cnt; for (int i = 0; i < N; ++ i) { int x; cin >> x; ++cnt[x]; } map<int,int> a; map<int,int> b; for (auto p : cnt) { a[p.first % M] += p.second; b[p.first % M] += p.second / 2; } int r = 0; for (int i = 0; i <= M-i; ++ i) { if (i == 0 || i == M-i) { r += a[i] / 2; } else { int p = min(a[i], a[M-i]); r += p; a[i] -= p; a[M-i] -= p; r += min(a[i]/2, b[i]); r += min(a[M-i]/2, b[M-i]); } } cout << r << endl; }
Submission Info
Submission Time | |
---|---|
Task | D - Pair Cards |
User | hasi |
Language | C++14 (GCC 5.4.1) |
Score | 700 |
Code Size | 590 Byte |
Status | AC |
Exec Time | 188 ms |
Memory | 14336 KB |
Judge Result
Set Name | sample | all | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 700 / 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 | 3 ms | 256 KB |
01-02.txt | AC | 60 ms | 3200 KB |
01-03.txt | AC | 61 ms | 3200 KB |
01-04.txt | AC | 60 ms | 3200 KB |
01-05.txt | AC | 61 ms | 3200 KB |
01-06.txt | AC | 61 ms | 3200 KB |
01-07.txt | AC | 62 ms | 3200 KB |
01-08.txt | AC | 68 ms | 3200 KB |
01-09.txt | AC | 68 ms | 3328 KB |
01-10.txt | AC | 94 ms | 6912 KB |
01-11.txt | AC | 154 ms | 12544 KB |
01-12.txt | AC | 30 ms | 256 KB |
01-13.txt | AC | 60 ms | 4352 KB |
01-14.txt | AC | 68 ms | 4864 KB |
01-15.txt | AC | 68 ms | 4992 KB |
01-16.txt | AC | 72 ms | 4992 KB |
01-17.txt | AC | 78 ms | 4992 KB |
01-18.txt | AC | 80 ms | 5248 KB |
01-19.txt | AC | 87 ms | 6144 KB |
01-20.txt | AC | 188 ms | 14336 KB |
01-21.txt | AC | 39 ms | 384 KB |
01-22.txt | AC | 39 ms | 384 KB |
01-23.txt | AC | 40 ms | 512 KB |
01-24.txt | AC | 41 ms | 512 KB |
01-25.txt | AC | 55 ms | 3328 KB |
01-26.txt | AC | 94 ms | 9856 KB |
01-27.txt | AC | 129 ms | 11904 KB |
01-28.txt | AC | 57 ms | 9728 KB |
01-29.txt | AC | 21 ms | 3968 KB |
01-30.txt | AC | 76 ms | 9600 KB |
sample-01.txt | AC | 3 ms | 256 KB |
sample-02.txt | AC | 3 ms | 256 KB |