Submission #995990
Source Code Expand
#include "bits/stdc++.h"
using namespace std;
//諸機能
#pragma region MACRO
#define putans(x) std::cerr << "[ answer ]: " ; cout << (x) << endl
#define dputans(x) std::cerr << "[ answer ]: "; cout << setprecision(40) << (double)(x) << endl
#define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
#define RREP(i,n,a) for(int i=(int)(n-1); i>= a; i--)
#define rep(i,n) REP(i,0,n)
#define rrep(i,n) RREP(i,n,0)
#define all(a) begin((a)),end((a))
#define mp make_pair
#define exist(container, n) ((container).find((n)) != (container).end())
#define equals(a,b) (fabs((a)-(b)) < EPS)
#ifdef _DEBUG //ファイルからテストデータを読み込む
std::ifstream ifs("data.txt");
#define put ifs >>
#else //ジャッジシステムでいい感じにやる
#define put cin >>
#endif
#pragma endregion
//デバッグなどの支援
#pragma region CODING_SUPPORT
#ifdef _DEBUG
#define dbg(var0) { std::cerr << ( #var0 ) << "=" << ( var0 ) << endl; }
#define dbg2(var0, var1) { std::cerr << ( #var0 ) << "=" << ( var0 ) << ", "; dbg(var1); }
#define dbg3(var0, var1, var2) { std::cerr << ( #var0 ) << "=" << ( var0 ) << ", "; dbg2(var1, var2); }
#define dbgArray(a,n) {std::cerr << (#a) << "="; rep(i,n){std::cerr <<(a[i])<<",";} cerr<<endl;}
#else
#define dbg(var0) {}
#define dbg2(var0, var1) {}
#define dbg3(var0, var1, var2) {}
#define dbgArray(a,n) {}
#endif
#pragma endregion
//typedef(書き換える、書き足す可能性ある)
#pragma region TYPE_DEF
typedef long long ll;
typedef pair<int, int> pii; typedef pair<string, string> pss; typedef pair<int, string>pis;
typedef pair<long long, long long> pll;
typedef vector<int> vi;
#pragma endregion
//諸々の定数(書き換える可能性ある)
#pragma region CONST_VAL
#define PI (2*acos(0.0))
#define EPS (1e-10)
#define MOD (ll)(1e9 + 7)
#define INF (ll)(2*1e9)
#pragma endregion
//
////区間に対する演算を高速に求めるためのセグメント木
// //int double とかのnumeric系に絞ったほうがよさげ
// //n 要素数
// //invalid_value 無効な数値 任意のaについてmarge(a,invalidvalue) = a, marge(invalid_value, a) = a となるような値
//class SegmentTreeLL {
//public:
// SegmentTreeLL(int n, ll invalid_value);
// ~SegmentTreeLL();
// void SetElem(int k, ll val);
// int GetCount();
// ll quary(int a, int b);
// ll GetElem(int k);
//
// //下の2つの関数をカスタマイズする
// //invalid_valueを元に不正な数値かどうか調べる
// bool IsInvalidValue(ll value) {
// return value == mInvalidValue;
// }
// //aとbから a∪bを求める関数、自分で計算方法をここで決める
// ll Marge(ll a, ll b) {
// return min(a,b);
// }
//private:
// vector<ll>
// mTree;
// int mCount;
// ll mInvalidValue;
// void Update(int k, ll val);
// ll InternalQuary(int a, int b, int k, int l, int r);
//};
//
////変更いらないはず
//SegmentTreeLL::SegmentTreeLL(int n, ll invalid_value) {
// int bin_n = 1;
// while (bin_n < n) bin_n *= 2;
// mTree.resize(2 * bin_n);
// mInvalidValue = invalid_value;
// mCount = bin_n;
// for (int i = 0; i < 2 * bin_n - 1; i++) {
// mTree[i] = invalid_value;
// }
//}
//SegmentTreeLL::~SegmentTreeLL() {
//}
//void SegmentTreeLL::SetElem(int k, ll val) { Update(k, val); }
//ll SegmentTreeLL::GetElem(int k) { return mTree[mCount - 1 + k]; }
//int SegmentTreeLL::GetCount() { return mCount; }
////値の更新
//void SegmentTreeLL::Update(int k, ll val) {
// k += mCount - 1;
// mTree[k] = val;
// while (k > 0) {
// k = ( k - 1 ) / 2;
// mTree[k] = Marge(mTree[2 * k + 1], mTree[2 * k + 2]);
// }
//}
////区間[a,b]の値をO(ln(Count))で求める b < GetCountとすること
////ex. a = 0 , b = 2 なら 0,1,2の区間
//ll SegmentTreeLL::quary(int a, int b) {
// return InternalQuary(a, b + 1, 0, 0, mCount);
//}
////内部の処理
//ll SegmentTreeLL::InternalQuary(int a, int b, int k, int l, int r) {
// if (r <= a || b <= l)return mInvalidValue;
// if (a <= l && r <= b)return mTree[k];
// else {
// int vl = InternalQuary(a, b, k * 2 + 1, l, ( l + r ) / 2);
// int vr = InternalQuary(a, b, k * 2 + 2, ( l + r ) / 2, r);
// return Marge(vl, vr);
// }
//}
////ここまで変更不要
//
//
//const static int MAX_V = 10000;
//
//vector<int> G[MAX_V];
//int root = 0;
//
//int vs[MAX_V * 2 - 1];
//SegmentTreeLL depth(2*16-1,INF);
//int id[MAX_V];
//
//void dfs(int v, int p, int d, int &k) {
// id[v] = k;
// vs[k] = v;
// depth.SetElem(k++, d);
// rep(i, G[v].size()) {
// if (G[v][i] != p) {
// dfs(G[v][i], v, d + 1, k);
// vs[k] = v;
// depth.SetElem(k++, d);
// }
// }
//}
////
//void init(int V) {
// int k = 0;
// dfs(root,-1,0,k);
//}
//
//int LCA(int u, int v) {
// return vs[depth.quary(min(id[u], id[v]), max(id[u], id[v]))];
//}
int main() {
int n, m; put n >> m;
int bucket[100000];
set<int> modList[100000];
fill(bucket, bucket + 100000, 0);
rep(i, n) {
int k; put k;
bucket[k]++;
modList[k % m].insert(k);
}
END:
int pair = 0;
for (auto i: modList[0])
{
pair += bucket[i]/2;
}
rep(i, (m-1)/2) {
int left = 1 + i;
int right = m - 1 - i;
int lPair = 0;
int rPair = 0;
int l = 0;
int r = 0;
for (auto k : modList[left]) {
lPair += bucket[k]/2;
l += bucket[k];
}
for (auto k : modList[left]) {
rPair += bucket[k]/2;
r += bucket[k];
}
//l -= lPair * 2;
//r -= rPair * 2;
int ss = min(l,r);
pair += ss;
l -= ss; r -= ss;
pair += l / 2; pair += r / 2;
}
putans(pair);
return 0;
}
Submission Info
Submission Time |
|
Task |
D - Pair Cards |
User |
pekoong |
Language |
C++14 (GCC 5.4.1) |
Score |
0 |
Code Size |
5663 Byte |
Status |
WA |
Exec Time |
72 ms |
Memory |
10112 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 |
WA |
8 ms |
5376 KB |
01-02.txt |
WA |
65 ms |
8320 KB |
01-03.txt |
WA |
64 ms |
8320 KB |
01-04.txt |
WA |
68 ms |
8320 KB |
01-05.txt |
WA |
64 ms |
8320 KB |
01-06.txt |
WA |
67 ms |
8320 KB |
01-07.txt |
WA |
63 ms |
8320 KB |
01-08.txt |
WA |
59 ms |
8320 KB |
01-09.txt |
WA |
55 ms |
8320 KB |
01-10.txt |
WA |
48 ms |
8320 KB |
01-11.txt |
WA |
48 ms |
8320 KB |
01-12.txt |
WA |
36 ms |
5376 KB |
01-13.txt |
WA |
36 ms |
5376 KB |
01-14.txt |
WA |
71 ms |
9984 KB |
01-15.txt |
WA |
71 ms |
9984 KB |
01-16.txt |
WA |
72 ms |
10112 KB |
01-17.txt |
WA |
66 ms |
9984 KB |
01-18.txt |
WA |
60 ms |
9984 KB |
01-19.txt |
WA |
56 ms |
9984 KB |
01-20.txt |
AC |
49 ms |
9984 KB |
01-21.txt |
WA |
45 ms |
5504 KB |
01-22.txt |
WA |
44 ms |
5504 KB |
01-23.txt |
WA |
43 ms |
5504 KB |
01-24.txt |
WA |
40 ms |
5504 KB |
01-25.txt |
WA |
37 ms |
5504 KB |
01-26.txt |
WA |
37 ms |
5504 KB |
01-27.txt |
WA |
28 ms |
7680 KB |
01-28.txt |
WA |
9 ms |
5504 KB |
01-29.txt |
WA |
8 ms |
5376 KB |
01-30.txt |
WA |
8 ms |
5376 KB |
sample-01.txt |
AC |
8 ms |
5376 KB |
sample-02.txt |
WA |
8 ms |
5376 KB |