This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <stdio.h>
#define N 10000
int min(int a, int b) { return a < b ? a : b; }
unsigned int X = 12345;
int rand_() {
return (X *= 3) >> 1;
}
int xx[N * 2], cc[N];
void sort(int *ii, int l, int r) {
while (l < r) {
int i = l, j = l, k = r, i_ = ii[l + rand_() % (r - l)], tmp;
while (j < k) {
int c = xx[ii[j]] != xx[i_] ? xx[ii[j]] - xx[i_] : (i_ & 1) - (ii[j] & 1);
if (c == 0)
j++;
else if (c < 0) {
tmp = ii[i], ii[i] = ii[j], ii[j] = tmp;
i++, j++;
} else {
k--;
tmp = ii[j], ii[j] = ii[k], ii[k] = tmp;
}
}
sort(ii, l, i);
l = k;
}
}
int iq[N + 1], pq[N], cnt;
int lt(int i, int j) { return xx[i << 1 | 1] > xx[j << 1 | 1]; }
int p2(int p) {
return (p *= 2) > cnt ? 0 : (p < cnt && lt(iq[p + 1], iq[p]) ? p + 1 : p);
}
void pq_up(int i) {
int p, q, j;
for (p = pq[i]; (q = p / 2) && lt(i, j = iq[q]); p = q)
iq[pq[j] = p] = j;
iq[pq[i] = p] = i;
}
void pq_dn(int i) {
int p, q, j;
for (p = pq[i]; (q = p2(p)) && lt(j = iq[q], i); p = q)
iq[pq[j] = p] = j;
iq[pq[i] = p] = i;
}
void pq_add(int i) {
pq[i] = ++cnt, pq_up(i);
}
void pq_remove(int i) {
int j = iq[cnt--];
if (j != i)
pq[j] = pq[i], pq_up(j), pq_dn(j);
pq[i] = 0;
}
int pq_first() {
return iq[1];
}
int main() {
static int ii[N * 2];
int n, m, h, i, i_, c, c_, ans;
scanf("%*d%d%d", &m, &n);
ans = 0;
for (i = 0; i < n; i++) {
scanf("%d%d%d", &xx[i << 1 | 0], &xx[i << 1 | 1], &cc[i]);
ans += cc[i];
}
for (i = 0; i < n * 2; i++)
ii[i] = i;
sort(ii, 0, n * 2);
c = 0;
for (h = 0; h < n * 2; h++) {
i_ = ii[h], i = i_ >> 1;
if ((i_ & 1) == 0) {
pq_add(i), c += cc[i];
while (cnt && c > m) {
i = pq_first(), c_ = min(c - m, cc[i]);
if ((cc[i] -= c_) == 0)
pq_remove(i);
c -= c_, ans -= c_;
}
} else if (pq[i])
pq_remove(i), c -= cc[i];
}
printf("%d\n", ans);
return 0;
}
Compilation message (stderr)
delivery.c: In function 'main':
delivery.c:81:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
81 | scanf("%*d%d%d", &m, &n);
| ^~~~~~~~~~~~~~~~~~~~~~~~
delivery.c:84:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
84 | scanf("%d%d%d", &xx[i << 1 | 0], &xx[i << 1 | 1], &cc[i]);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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