Submission #1041208

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Source Code Expand

#include "bits/stdc++.h"
using namespace std;
#define rep(i,n) for(int (i)=0;(i)<(int)(n);++(i))
#define rer(i,l,u) for(int (i)=(int)(l);(i)<=(int)(u);++(i))
#define reu(i,l,u) for(int (i)=(int)(l);(i)<(int)(u);++(i))
static const int INF = 0x3f3f3f3f; static const long long INFL = 0x3f3f3f3f3f3f3f3fLL;
typedef vector<int> vi; typedef pair<int, int> pii; typedef vector<pair<int, int> > vpii; typedef long long ll;
template<typename T, typename U> static void amin(T &x, U y) { if (y < x) x = y; }
template<typename T, typename U> static void amax(T &x, U y) { if (x < y) x = y; }

int main() {
	int N; int K;
	while (~scanf("%d%d", &N, &K)) {
		vector<int> a(N);
		for (int i = 0; i < N; ++i)
			scanf("%d", &a[i]);
		vector<ll> sum(N + 1), possum(N + 1);
		rep(i, N) {
			sum[i + 1] = sum[i] + a[i];
			possum[i + 1] = possum[i] + max(a[i], 0);
		}
		ll ans = 0;
		rer(i, 0, N - K) {
			amax(ans, possum[i] + (possum[N] - possum[i + K]));
			amax(ans, possum[i] + (sum[i + K] - sum[i]) + (possum[N] - possum[i + K]));
		}
		printf("%lld\n", ans);
	}
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:16:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d", &a[i]);
                      ^

Judge Result