Submission #1440515
Source Code Expand
#include<bits/stdc++.h>
using namespace std;
int ans;
int n,m;
int x[100005];
int num[100005],match[100005];
int main(){
scanf("%d%d",&n,&m);
for(int i=1,v;i<=n;i++) scanf("%d",&v),x[v%m]++,num[v]++;
for(int i=1;i<=100000;i++) match[i%m]+=num[i]/2;
int ans=x[0]/2*2;
if(m%2==0) ans+=x[m/2]/2*2;
for(int i=1;i<(m+1)/2;i++){
int x1=x[i],x2=x1-match[i]*2,y1=x[m-i],y2=y1-match[m-i]*2;
if(x1<y1) swap(x1,y1),swap(x2,y2);
if(x2<=y1) ans+=x1+y1-(x1+y1)%2;
else ans+=match[i]*2+y1*2;
}
cout<<ans/2<<endl;
return 0;
}
Submission Info
Submission Time
2017-07-20 23:03:12+0900
Task
D - Pair Cards
User
Wuvin
Language
C++14 (GCC 5.4.1)
Score
0
Code Size
546 Byte
Status
WA
Exec Time
13 ms
Memory
1408 KB
Compile Error
./Main.cpp: In function ‘int main()’:
./Main.cpp:8:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d",&n,&m);
^
./Main.cpp:9:58: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
for(int i=1,v;i<=n;i++) scanf("%d",&v),x[v%m]++,num[v]++;
^
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, sample-01.txt, sample-02.txt
Case Name
Status
Exec Time
Memory
01-01.txt
AC
2 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
WA
12 ms
896 KB
01-11.txt
WA
13 ms
1408 KB
01-12.txt
AC
11 ms
256 KB
01-13.txt
AC
11 ms
384 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
640 KB
01-22.txt
AC
11 ms
640 KB
01-23.txt
AC
11 ms
640 KB
01-24.txt
WA
11 ms
640 KB
01-25.txt
WA
12 ms
896 KB
01-26.txt
WA
12 ms
1408 KB
01-27.txt
AC
7 ms
1024 KB
01-28.txt
WA
2 ms
1408 KB
01-29.txt
AC
2 ms
896 KB
01-30.txt
AC
2 ms
768 KB
sample-01.txt
AC
2 ms
256 KB
sample-02.txt
AC
2 ms
256 KB