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
2019-04-18 20:09:51+0900
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
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