Submission #1793909

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Source Code Expand

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <fstream>
#include <string>
#include <algorithm>
#include <cstdlib>
#include <vector>
#include <stack>
#include <queue>
#include <complex>
#include <set>
#include <list>
#include <iomanip>
#include <map>
#include <memory.h>



using namespace std;
static const double EPS = 1e-9;
typedef long long ll;
typedef unsigned long long ull;
#define FOR(i,n) for(int i=0;i<(int)n;++i)
#define FORNUM(p, x) for (int num = p; num < (int)(x); ++num)
#define FORI(p, x) for (int i = p; i < (int)(x); ++i)
#define FORJ(p, x) for (int j = p; j < (int)(x); ++j)
#define FORK(p, x) for (int k = p; k < (int)(x); ++k)
#define FORL(p, x) for (int l = p; l < (int)(x); ++l)

typedef pair<int,int>P;
#define INF 1000000000
 
struct edge { 
	int from, to; 
	edge (int from, int to){
		this->from=from; this->to=to;
	}
};
 
int V,E;
typedef vector<edge> edges;
vector<edges> G;

int n, a;


int main(){
	scanf("%d ", &n);
	map<int, int> m;
	FORI(0, n) {
		scanf("%d ", &a);
		m[a]++;
	}
	int ans = 0;
	for (map<int, int>::iterator p = m.begin(); p != m.end(); p++) {
		ans += p->second % 2;
	}
	printf("%d\n", ans);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:48:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d ", &n);
                  ^
./Main.cpp:51:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d ", &a);
                   ^

Judge Result