OJ-Problems-Source/HDOJ/5280_autoAC.cpp

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#include <set>
#include <map>
#include <queue>
#include <deque>
#include <cmath>
#include <vector>
#include <string>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cassert>
#include <iostream>
#include <algorithm>
using namespace std;
typedef long long LL;
typedef pair <int, int> PII;
const int N = 1e5 + 7;
const int INF = 0x3f3f3f3f;
const int MOD = 1e9 + 7;
const double EPS = 1e-6;
const double PI = acos(-1.0);
int a[N];
LL l[N], r[N];
int main(void){
int T;
scanf("%d", &T);
while (T--) {
int n, p;
scanf("%d%d", &n, &p);
for (int i = 1; i <= n; ++i)
scanf("%d", &a[i]);
l[0] = r[0] = l[n + 1] = r[n + 1] = 0;
for (int i = 1; i <= n; ++i)
l[i] = max(l[i - 1] + a[i], (LL)a[i]);
for (int i = n; i; --i)
r[i] = max(r[i + 1] + a[i], (LL)a[i]);
LL ans = -INF;
for (int i = 1; i <= n; ++i) {
ans = max(ans, max(l[i - 1], 0LL) + max(r[i + 1], 0LL) + p);
}
for (int i = 1; i < n; ++i) {
ans = max(ans, l[i]);
}
for (int i = n; i > 1; --i) {
ans = max(ans, r[i]);
}
printf("%I64d\n", ans);
}
return 0;
}