Submission #17673312

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Source Code Expand

#include <bits/stdc++.h>

typedef long long int64;
typedef unsigned int uint;
typedef unsigned long long uint64;
typedef double db;
typedef long double db64;

const int N = 2e5, K = 300, MOD = 998244353, I2 = (MOD + 1) / 2;

int n, k, a[N + 5], c[K + 5][K + 5];
int64 s[K + 5];

int main() {
	scanf("%d%d", &n, &k);
	for (int i = 0; i <= k; i++) {
		c[i][0] = 1;
		for (int j = 1; j <= i; j++) {
			c[i][j] = (c[i - 1][j] + c[i - 1][j - 1]) % MOD;
		}
	}
	for (int i = 1; i <= n; i++) {
		scanf("%d", &a[i]);
		for (int x = 1, j = 0; j <= k; j++, x = (int64)x * a[i] % MOD) {
			s[j] += x;
		}
	}
	for (int i = 0; i <= k; i++) {
		s[i] %= MOD;
	}
	int pw = 2;
	for (int i = 1; i <= k; i++) {
		int64 ans = 0;
		for (int j = 0; j <= i; j++) {
			ans += (int64)s[j] * s[i - j] % MOD * c[i][j] % MOD;
		}
		ans -= (int64)pw * s[i] % MOD;
		pw = (pw + pw) % MOD;
		ans %= MOD;
		printf("%lld\n", (ans * I2 % MOD + MOD) % MOD);
	}
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:15:7: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   15 |  scanf("%d%d", &n, &k);
      |  ~~~~~^~~~~~~~~~~~~~~~
./Main.cpp:23:8: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   23 |   scanf("%d", &a[i]);
      |   ~~~~~^~~~~~~~~~~~~

Judge Result