又是一道神仙题？？。。
把绝对值拆开之后状压前面的符号？。。
下界显然，但是上界为啥是对的呀qwq。。
我要评论#include<bits/stdc++.h>
using namespace std;
const int maxn = 1e6 + 10;
inline int read() {
char c = getchar(); int x = 0, f = 1;
while(c < '0' || c > '9') {if(c == '-') f = -1; c = getchar();}
while(c >= '0' && c <= '9') x = x * 10 + c - '0', c = getchar();
return x * f;
}
int n, k, c[maxn], ans;
struct node {
int v[6], vk;
bool operator < (const node &rhs) const {
return vk < rhs.vk;
}
}a[maxn];
int main() {
n = read(); k = read() - 1;
for(int i = 0; i <= k; i++) c[i] = read();
for(int i = 1; i <= n; i++) {
for(int j = 0; j < k; j++) a[i].v[j] = read() * c[j]; a[i].vk = read() * c[k];
}
sort(a + 1, a + n + 1);
for(int sta = 0; sta < (1 << k); sta++) {
int mn = 1e9 + 10;
for(int i = 1; i <= n; i++) {
int now = 0;
for(int j = 0; j < k; j++)
now += (sta >> j & 1) ? -a[i].v[j] : a[i].v[j];
now -= a[i].vk;
ans = max(ans, now - mn);
mn = min(now, mn);
}
}
cout << ans;
return 0;
}
/*
5 3
1 2 3
-5 3 2
-2 3 0
0 5 9
3 4 -1
-10 -11 7
*/
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