Submission #2854010

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Source Code Expand

#include<bits/stdc++.h>
using namespace std;

int main() {
    int N, A, x, y;
    set<int> st;
    scanf("%d", &N);
    x = y = 0;
    for (int i = 0; i < N; i++) {
        scanf("%d", &A);
        bool flg = st.insert(A).second;
        if (flg == false) {
            y = max(y, min(x, A));
            x = max(x, A);
            st.erase(A);
        }
    }
    printf("%lld\n", (long long)x * y);
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:7:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &N);
                    ^
./Main.cpp:10:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &A);
                        ^

Judge Result