Submission #845970

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Source Code Expand

#include<bits/stdc++.h>
#define PB push_back
#define MP(x,y) make_pair(x,y)
#define F first
#define S second
#define ALL(x) x.begin(),x.end()
using namespace std;

typedef double DB;
typedef long double LDB;
typedef long long LL;
typedef pair<int,int> pii;
typedef pair<int,DB> pid;
typedef pair<DB,int> pdi;
typedef pair<DB,DB> pdd;

template<typename T>
inline bool getmin(T& a,const T& b) {return b < a? (a=b,true):false;}
template<typename T>
inline bool getmax(T& a,const T& b) {return b > a? (a=b,true):false;}
template<typename T>
inline bool inrange(const T& x,const T& L,const T& R) {return L<=x && x<=R;}

const int maxn=100000+5;
vector<int> disc;
int num[maxn];
int main()
{
    int N,ans=0,badodd=0,badeven=0;
    scanf("%d",&N);
    for(int i=0;i<N;i++)
    {
        scanf("%d",num+i);
        disc.PB(num[i]);
    }
    sort(ALL(disc));
    for(int i=0;i<N;i++)
    {
        num[i]=lower_bound(ALL(disc),num[i])-disc.begin();
        if((num[i]&1)^(i&1))
        {
            if(num[i]&1) badodd++;
            else badeven++;
        }
    }
    assert(badodd==badeven);
    printf("%d\n",badodd);
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:30:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&N);
                   ^
./Main.cpp:33:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",num+i);
                          ^

Judge Result