Submission #4032773

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Source Code Expand

#include<bits/stdc++.h>

using namespace std;

int arr[100005];

int main(){

    int n, area;
    scanf("%d", &n);

    for(int i=0; i<n; i++){
        int x;
        scanf("%d", &arr[i]);
    }
    sort(arr, arr+n);
    for(int i=0; i<n; i++){
    if(arr[i]==arr[i+1]) 
    { arr[i+1]=0;}
    else arr[i]=0; 
    }
        sort(arr, arr+n);
        if(arr[n-2]==0) area=arr[n-1]*arr[n-1];
    else area=arr[n-1]*arr[n-2];
    { if(area==0) {printf("%d\n", area);
    printf("No rectangle can be formed.\n");}
    else printf("%d\n", area);}
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:10:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
                    ^
./Main.cpp:14:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &arr[i]);
                             ^

Judge Result