Submission #994277


Source Code Expand

#include <bits/stdc++.h>
using namespace std;

int main(void){
	int N,M;
	cin >> N >> M;

	vector<int> x(N);
	vector<int> nums(200001);
	for(int i=0;i<N;i++){
		cin >> x[i];
		nums[ abs( x[i] - ceil(1. * x[i] / M) * M ) ]++;
	}

	if( M == 1 ){
		cout << N/2 << endl;
		return 0;
	}

	int ret = 0;
	for(int i=0;i<=M;i++){
		// if(nums[i])
		// 	cout << i << " " << nums[i] << endl;
		int mx = min(nums[i],nums[M-i]);
		nums[i] -= mx;
		nums[M-i] -= mx;
		ret += mx;
		// if(nums[i] >= 2){
		// 	int same = nums[i] / 2;
		// 	ret += same;
		// 	nums[i] -= same * 2;
		// }
		// if(nums[M-i] >= 2){
		// 	int same = nums[M-i] / 2;
		// 	ret += same;
		// 	nums[M-i] -= same * 2;
		// }
	}
	cout << ret << endl;
	return 0;
}

Submission Info

Submission Time
Task D - Pair Cards
User tkzw_21
Language C++14 (GCC 5.4.1)
Score 0
Code Size 760 Byte
Status WA
Exec Time 33 ms
Memory 1536 KB

Judge Result

Set Name sample all
Score / Max Score 0 / 0 0 / 700
Status
AC × 2
AC × 7
WA × 25
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 1024 KB
01-02.txt AC 31 ms 1408 KB
01-03.txt WA 31 ms 1408 KB
01-04.txt WA 31 ms 1408 KB
01-05.txt WA 31 ms 1408 KB
01-06.txt WA 31 ms 1408 KB
01-07.txt WA 32 ms 1408 KB
01-08.txt WA 32 ms 1408 KB
01-09.txt WA 31 ms 1408 KB
01-10.txt WA 32 ms 1408 KB
01-11.txt WA 32 ms 1408 KB
01-12.txt WA 32 ms 1408 KB
01-13.txt WA 32 ms 1408 KB
01-14.txt AC 31 ms 1536 KB
01-15.txt WA 31 ms 1408 KB
01-16.txt WA 31 ms 1408 KB
01-17.txt WA 31 ms 1408 KB
01-18.txt WA 31 ms 1408 KB
01-19.txt WA 31 ms 1408 KB
01-20.txt WA 32 ms 1408 KB
01-21.txt WA 32 ms 1408 KB
01-22.txt WA 32 ms 1408 KB
01-23.txt WA 31 ms 1408 KB
01-24.txt WA 33 ms 1408 KB
01-25.txt WA 31 ms 1408 KB
01-26.txt WA 32 ms 1408 KB
01-27.txt WA 18 ms 1280 KB
01-28.txt WA 5 ms 1024 KB
01-29.txt AC 4 ms 1024 KB
01-30.txt AC 4 ms 1024 KB
sample-01.txt AC 3 ms 1024 KB
sample-02.txt AC 3 ms 1024 KB