Submission #3819777

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Source Code Expand

///  author:Kissheart  ///
#include<stdio.h>
#include<algorithm>
#include<iostream>
#include<string.h>
#include<vector>
#include<stdlib.h>
#include<math.h>
#include<queue>
#include<deque>
#include<ctype.h>
#include<map>
#include<set>
#include<stack>
#include<string>
#define INF 0x3f3f3f3f
#define FAST_IO ios::sync_with_stdio(false)
const double PI = acos(-1.0);
const double eps = 1e-6;
const int MAX=2e5+10;
const int mod=1e9+7;
typedef long long ll;
using namespace std;
#define gcd(a,b) __gcd(a,b)
inline ll lcm(ll a,ll b){return a/gcd(a,b)*b;}
inline ll qpow(ll a,ll b){ll r=1,t=a; while(b){if(b&1)r=(r*t)%mod;b>>=1;t=(t*t)%mod;}return r;}
inline ll inv1(ll b){return qpow(b,mod-2);}
inline ll exgcd(ll a,ll b,ll &x,ll &y){if(!b){x=1;y=0;return a;}ll r=exgcd(b,a%b,y,x);y-=(a/b)*x;return r;}
inline ll read(){ll x=0,f=1;char c=getchar();for(;!isdigit(c);c=getchar()) if(c=='-') f=-1;for(;isdigit(c);c=getchar()) x=x*10+c-'0';return x*f;}
//freopen( "in.txt" , "r" , stdin );
//freopen( "data.txt" , "w" , stdout );
int n,t;
int a[MAX],vis[MAX];
int solve1()
{
    int ans=0,sum=0;
    int p;
    memset(vis,0,sizeof(vis));
    for(int i=2;i<=n;i+=2)
    {
        vis[a[i]]++;
        if(vis[a[i]]>sum)
        {
            sum=vis[a[i]];
            p=a[i];
        }
    }
    ans=(t-sum);
    sum=0;
    memset(vis,0,sizeof(vis));
    for(int i=1;i<=n;i+=2)
    {
        vis[a[i]]++;
        if(vis[a[i]]>sum && a[i]!=p)
            sum=vis[a[i]];
    }
    ans+=(t-sum);
    return ans;
}
int solve2()
{
    int ans=0,sum=0;
    int p;
    memset(vis,0,sizeof(vis));
    for(int i=1;i<=n;i+=2)
    {
        vis[a[i]]++;
        if(vis[a[i]]>sum)
        {
            sum=vis[a[i]];
            p=a[i];
        }
    }
    ans=(t-sum);
    sum=0;
    memset(vis,0,sizeof(vis));
    for(int i=2;i<=n;i+=2)
    {
        vis[a[i]]++;
        if(vis[a[i]]>sum && a[i]!=p)
            sum=vis[a[i]];
    }
    ans+=(t-sum);
    return ans;
}
int main()
{
    scanf("%d",&n);
    for(int i=1;i<=n;i++)
        scanf("%d",&a[i]);

    t=n/2;
    printf("%d\n",min(solve1(),solve2()));
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:88:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
                   ^
./Main.cpp:90:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&a[i]);
                          ^

Judge Result