Submission #1370678

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Source Code Expand

#include <iostream>
#include <cstdio>
using namespace std;

typedef long long ll;

int main() {
  int N, K;
  cin >> N >> K;
  int a[N];
  for (int i = 1; i < N + 1; i++) scanf("%d", a + i);

  // 累積和を使って合計を求める
  a[0] = 0;
  for (int i = 1; i < N + 1; i++) a[i] += a[i-1];
  ll ans = 0;
  for (int i = K; i < N + 1; i++) {
    ans += a[i] - a[i-K];
  }

  // 解答
  cout << ans << endl;
  return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:11:53: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   for (int i = 1; i < N + 1; i++) scanf("%d", a + i);
                                                     ^

Judge Result