Submission #1689848

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Source Code Expand

#include <stdio.h>
#define MAX_N 201
#define MOD 998244353

int x[MAX_N], y[MAX_N], p[MAX_N];

int main(void)
{
    int n;
    scanf("%d", &n);
    for (int i = 0; i < n; i++)
        scanf("%d%d", &x[i], &y[i]);
    p[0] = 1;
    for (int i = 0; i < n; i++)
        p[i + 1] = (p[i] << 1) % MOD;
    int ans = p[n] - n - 1;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < i; j++) {
            int cnt = 0;
            for (int k = 0; k < j; k++) {
                if ((x[i] - x[j]) * (y[i] - y[k]) == (x[i] - x[k]) * (y[i] - y[j]))
                    cnt++;
            }
            ans -= p[cnt];
            ans += MOD;
            ans %= MOD;
        }
    }
    printf("%d\n", ans);
    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:12:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d", &x[i], &y[i]);
                                    ^

Judge Result