Submission #5017679

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
int n,m;
int num[100005];
int yu[100005];
int temp;
int ans;
int main()
{
    scanf("%d %d",&n,&m);
    for(int i=0;i<n;i++)
    {
        scanf("%d",&temp);
        num[temp]++;
        yu[temp%m]++;
    }
    if(yu[0]>=2)
    {
        int minn=yu[0]/2;
        yu[0]-=minn*2;
        ans+=minn;
    }
    for(int i=1;i<m;i++)
    {
        if(yu[i]>0 && yu[m-i]>0)
        {
            if(i!=m-i)
            {int minn=min(yu[i],yu[m-i]);
            yu[i]-=minn;
            yu[m-i]-=minn;
            ans+=minn;}
            else
            {
                int minn=yu[i]/2;
                yu[i]-=minn*2;
                ans+=minn;
            }
        }
    }
    for(int i=1;i<=100000;i++)
    {
        if(num[i]>=2 && yu[i%m]>=2)
        {
            int minn=min(num[i]/2,yu[i%m]/2);
            yu[i%m]-=2*minn;
            ans+=minn;
            //cout<<i<<endl;
        }
    }
    printf("%d\n",ans);
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:10:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d",&n,&m);
                         ^
./Main.cpp:13:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&temp);
                          ^

Judge Result