Submission #3269308

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Source Code Expand

#include <bits/stdc++.h>
#define MOD 1000000007
using namespace std;
typedef long long ll;
typedef pair<ll, ll> P;
typedef tuple<ll, ll, ll> T;

int N;
map<ll, int> mp;

int main(void){
    
    scanf("%d", &N);
    for(int i = 0; i < N; ++i){
        ll a; scanf("%lld", &a);
        if(mp.find(a) == mp.end()) ++mp[a];
        else mp.erase(a);
    }
    printf("%d\n", (int)mp.size());
    
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:13:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &N);
                    ^
./Main.cpp:15:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         ll a; scanf("%lld", &a);
                                ^

Judge Result