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30 lines
860 B
C++

#include <bits/stdc++.h>
using namespace std;
int main() {
int T, n, a, b, c, d, e, f, g;
scanf("%d", &T);
while (T--) {
scanf("%d", &n);
int ans = 0;
for (int i = 0; i < n; i++) {
scanf("%d%d%d%d%d%d%d", &a, &b, &c, &d, &e, &f, &g);
if (a - d - f + g < 0) continue;
if (b - d - e + g < 0) continue;
if (c - f - e + g < 0) continue;
if (g > e) continue;
if (g > f) continue;
if (g > d) continue;
if (d > a) continue;
if (d > b) continue;
if (e > b) continue;
if (e > c) continue;
if (f > a) continue;
if (f > c) continue;
ans = max(ans, a + b + c - d - f - e + g);
}
printf("%d\n", ans);
}
return 0;
}