Submission #5017460


Source Code Expand

#include <bits/stdc++.h>
using namespace std;
int n,m,b[100010],d[100010],c[100010];
int main(){
	scanf("%d%d",&n,&m);
	for(int i=1;i<=n;i++){
		int x;
		scanf("%d",&x);
		b[x%m]++;
		c[x]++;
		if(c[x]%2==0)d[x%m]++;
	}
	int ans=0;
	for(int x=0;x<m;x++){
		int y=m-x;
		if(y==x||y==m)ans+=b[x]/2;
		else{
			ans+=min(b[x],b[y]);
			if(b[x]<b[y])ans+=min((b[y]-b[x])/2,d[y]);
			else ans+=min((b[x]-b[y])/2,d[x]);
		}

		//printf("%d %d %d %d %d %d %d\n",x,y,b[x],b[y],d[x],d[y],ans);
		b[x]=b[y]=0;
		d[x]=d[y]=0;
	}
	printf("%d\n",ans);
	return 0;
}

Submission Info

Submission Time
Task D - Pair Cards
User vjudge2
Language C++14 (GCC 5.4.1)
Score 700
Code Size 551 Byte
Status AC
Exec Time 13 ms
Memory 1408 KB

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:5:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
                     ^
./Main.cpp:8:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&x);
                 ^

Judge Result

Set Name sample all
Score / Max Score 0 / 0 700 / 700
Status
AC × 2
AC × 34
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, sample-01.txt, sample-02.txt
Case Name Status Exec Time Memory
01-01.txt AC 1 ms 256 KB
01-02.txt AC 11 ms 640 KB
01-03.txt AC 11 ms 640 KB
01-04.txt AC 11 ms 640 KB
01-05.txt AC 11 ms 640 KB
01-06.txt AC 11 ms 640 KB
01-07.txt AC 11 ms 640 KB
01-08.txt AC 11 ms 640 KB
01-09.txt AC 11 ms 640 KB
01-10.txt AC 12 ms 896 KB
01-11.txt AC 13 ms 1408 KB
01-12.txt AC 10 ms 256 KB
01-13.txt AC 11 ms 640 KB
01-14.txt AC 11 ms 640 KB
01-15.txt AC 11 ms 640 KB
01-16.txt AC 11 ms 640 KB
01-17.txt AC 11 ms 640 KB
01-18.txt AC 11 ms 640 KB
01-19.txt AC 11 ms 768 KB
01-20.txt AC 12 ms 1408 KB
01-21.txt AC 11 ms 768 KB
01-22.txt AC 11 ms 640 KB
01-23.txt AC 11 ms 640 KB
01-24.txt AC 11 ms 640 KB
01-25.txt AC 12 ms 896 KB
01-26.txt AC 12 ms 1408 KB
01-27.txt AC 7 ms 1280 KB
01-28.txt AC 2 ms 1408 KB
01-29.txt AC 2 ms 896 KB
01-30.txt AC 2 ms 1024 KB
sample-01.txt AC 1 ms 256 KB
sample-02.txt AC 1 ms 256 KB