CSES - Aalto Competitive Programming 2024 - wk10 - Mon - Results
Submission details
Task:Polygon area
Sender:arnxxau
Submission time:2024-11-11 16:26:05 +0200
Language:C++ (C++20)
Status:READY
Result:ACCEPTED
Test results
testverdicttime
#1ACCEPTED0.00 sdetails
#2ACCEPTED0.00 sdetails
#3ACCEPTED0.00 sdetails

Code

#include <iostream>
#include <vector>
#include <algorithm>
#include <climits>
using namespace std;

#define ll long long int


 

ll polygonArea(vector<ll>& X, vector<ll>& Y, int n)
{
    ll area = 0;
 
    int j = n - 1;
    for (int i = 0; i < n; i++)
    {
        area += (X[j] + X[i]) * (Y[j] - Y[i]);
        j = i; 
    }
 
    return abs(area);
}
 

int main()
{
    int n;
    cin >> n;

    vector<ll> X(n);
    vector<ll> Y(n);

    for (int i = 0; i < n; i++)
    {
        cin >> X[i];
        cin >> Y[i];
    }
    
 
 
    cout << polygonArea(X, Y, n) << endl;
}

Test details

Test 1

Verdict: ACCEPTED

input
100
-7 -19
91 77
100 100
64 60
...

correct output
43582

user output
43582

Test 2

Verdict: ACCEPTED

input
1000
365625896 -113418831
278762563 38777445
250367343 -96991975
175866909 -129766978
...

correct output
4053466653883387139

user output
4053466653883387139

Test 3

Verdict: ACCEPTED

input
4
-1000000000 -1000000000
-1000000000 1000000000
1000000000 1000000000
1000000000 -1000000000

correct output
8000000000000000000

user output
8000000000000000000