Submission #2194664


Source Code Expand

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

#define int long long

int dx[] = {1, 0, -1, 0, 1, -1, -1, 1};
int dy[] = {0, 1, 0, -1, 1, 1, -1, -1};

/*
#define cin ifs
#define cout ofs
ifstream ifs("in.txt");
ofstream ofs("out.txt");
//*/

int N;
int x[200], y[200];
int mod = 998244353;
bool used[200][200];

signed main() {
    cin >> N;
    for (int i = 0; i < N; i++) {
        cin >> x[i] >> y[i];
    }
    int ans = 1;
    for (int i = 0; i < N; i++) {
        ans *= 2;
        ans %= mod;
    }
    ans -= 1 + N;
    ans += mod;
    ans %= mod;
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            if (i == j)
                continue;
            int cur = 0;
            int diff = 1;
            for (int k = 0; k < N; k++) {
                if (used[i][k] && used[j][k] &&
                    (x[i] - x[j]) * (y[i] - y[k]) ==
                        (x[i] - x[k]) * (y[i] - y[j])) {
                    goto check;
                }
            }
            for (int k = 0; k < N; k++) {
                if ((x[i] - x[j]) * (y[i] - y[k]) ==
                    (x[i] - x[k]) * (y[i] - y[j])) {
                    cur++;
                    used[i][k] = used[k][i] = true;
                }
            }
            for (int k = 0; k < cur; k++) {
                diff *= 2;
                diff %= mod;
            }
            diff -= 1 + cur;
            diff += mod;
            diff %= mod;
            ans -= diff;
            ans += mod;
            ans %= mod;
        check:;
        }
    }
    cout << ans << endl;
    return 0;
}

Submission Info

Submission Time
Task E - ConvexScore
User packer_jp
Language C++14 (GCC 5.4.1)
Score 700
Code Size 1658 Byte
Status AC
Exec Time 18 ms
Memory 256 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 700 / 700
Status
AC × 3
AC × 36
Set Name Test Cases
Sample 0_000.txt, 0_001.txt, 0_002.txt
All 0_000.txt, 0_001.txt, 0_002.txt, 1_003.txt, 1_004.txt, 1_005.txt, 1_006.txt, 1_007.txt, 1_008.txt, 1_009.txt, 1_010.txt, 1_011.txt, 1_012.txt, 1_013.txt, 1_014.txt, 1_015.txt, 1_016.txt, 1_017.txt, 1_018.txt, 1_019.txt, 1_020.txt, 1_021.txt, 1_022.txt, 1_023.txt, 1_024.txt, 1_025.txt, 1_026.txt, 1_027.txt, 1_028.txt, 1_029.txt, 1_030.txt, 1_031.txt, 1_032.txt, 1_033.txt, 1_034.txt, 1_035.txt
Case Name Status Exec Time Memory
0_000.txt AC 1 ms 256 KB
0_001.txt AC 1 ms 256 KB
0_002.txt AC 1 ms 256 KB
1_003.txt AC 1 ms 256 KB
1_004.txt AC 1 ms 256 KB
1_005.txt AC 5 ms 256 KB
1_006.txt AC 1 ms 256 KB
1_007.txt AC 9 ms 256 KB
1_008.txt AC 6 ms 256 KB
1_009.txt AC 8 ms 256 KB
1_010.txt AC 3 ms 256 KB
1_011.txt AC 8 ms 256 KB
1_012.txt AC 10 ms 256 KB
1_013.txt AC 5 ms 256 KB
1_014.txt AC 1 ms 256 KB
1_015.txt AC 1 ms 256 KB
1_016.txt AC 1 ms 256 KB
1_017.txt AC 16 ms 256 KB
1_018.txt AC 15 ms 256 KB
1_019.txt AC 16 ms 256 KB
1_020.txt AC 16 ms 256 KB
1_021.txt AC 18 ms 256 KB
1_022.txt AC 18 ms 256 KB
1_023.txt AC 17 ms 256 KB
1_024.txt AC 17 ms 256 KB
1_025.txt AC 15 ms 256 KB
1_026.txt AC 14 ms 256 KB
1_027.txt AC 1 ms 256 KB
1_028.txt AC 1 ms 256 KB
1_029.txt AC 14 ms 256 KB
1_030.txt AC 17 ms 256 KB
1_031.txt AC 16 ms 256 KB
1_032.txt AC 16 ms 256 KB
1_033.txt AC 16 ms 256 KB
1_034.txt AC 16 ms 256 KB
1_035.txt AC 14 ms 256 KB