C++ Code
struct heap {
elem_t h[MAXN];
int n, p, c;
void init() {
n = 0;
}
void ins(elem_t e) {
for(p = ++n; p > 1 && _cp(e, h[p >> 1]); h[p] = h[p >> 1], p >>= 1);
h[p] = e;
}
int del(elem_t &e) {
if(!n) return 0;
for(e = h[p = 1], c = 2; c < n && _cp(h[c += (c < n - 1 && _cp(h[c + 1], h[c]))], h[n]); h[p] = h[c], p = c, c <<= 1);
h[p] = h[n--];
return 1;
}
};