@@ -15,7 +15,7 @@ int sum[N * N];
int m, n, mn, vol;
int first_ge() {
- int s = 0, e = m * n - 1;
+ int s = 0, e = mn - 1;
while (s <= e) {
int m = s + (e - s) / 2;
if (sum[m] < vol) {
