| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 745256 |
2023-05-19T16:16:21 Z |
rainboy |
RMQ (NOI17_rmq) |
C |
|
1 ms |
212 KB |
#include <stdio.h>
#include <string.h>
#define N 100000
#define Q 100000
int min(int a, int b) { return a < b ? a : b; }
int max(int a, int b) { return a < b ? a : b; }
unsigned int X = 12345;
int rand_() {
return (X *= 3) >> 1;
}
int n;
int ll[Q], rr[Q], bb[Q];
void sort(int *hh, int l, int r) {
while (l < r) {
int i = l, j = l, k = r, h = hh[l + rand_() % (r - l)], tmp;
while (j < k)
if (bb[hh[j]] == bb[h])
j++;
else if (bb[hh[j]] > bb[h]) {
tmp = hh[i], hh[i] = hh[j], hh[j] = tmp;
i++, j++;
} else {
k--;
tmp = hh[j], hh[j] = hh[k], hh[k] = tmp;
}
sort(hh, l, i);
l = k;
}
}
int ds[N], jj[N]; char marked[N];
int find(int i) {
return ds[i] < 0 ? i : (ds[i] = find(ds[i]));
}
void join(int i, int j) {
i = find(i);
j = find(j);
if (i == j)
return;
if (ds[i] > ds[j])
ds[i] = j;
else {
if (ds[i] == ds[j])
ds[i]--;
ds[j] = i, jj[i] = jj[j];
}
}
int next(int i) {
return !marked[i] ? i : jj[find(i)] + 1;
}
void mark(int i) {
marked[i] = 1;
if (i > 0 && marked[i - 1])
join(i - 1, i);
if (i + 1 < n && marked[i + 1])
join(i, i + 1);
}
int main() {
static int hh[Q], qu[N], aa[N];
int q, cnt, h, h_, i, a, l, r;
scanf("%d%d", &n, &q);
for (h = 0; h < q; h++)
scanf("%d%d%d", &ll[h], &rr[h], &bb[h]);
for (h = 0; h < q; h++)
hh[h] = h;
sort(hh, 0, q);
memset(ds, -1, n * sizeof *ds);
for (i = 0; i < n; i++)
jj[i] = i;
cnt = 0;
for (a = n - 1, h = 0; a >= 0; a--) {
h_ = h, l = 0, r = n - 1;
while (h_ < q && bb[hh[h_]] == a)
l = max(l, ll[hh[h_]]), r = min(r, rr[hh[h_]]), h_++;
qu[cnt++] = a;
if (h < h_) {
if ((i = next(l)) > r) {
for (i = 0; i < n; i++)
printf("-1%c", i + 1 < n ? ' ' : '\n');
return 0;
}
aa[i] = qu[--cnt], mark(i);
while (h < h_) {
l = ll[hh[h]], r = rr[hh[h]];
while ((i = next(l)) <= r) {
if (cnt == 0) {
for (i = 0; i < n; i++)
printf("-1%c", i + 1 < n ? ' ' : '\n');
return 0;
}
aa[i] = qu[--cnt], mark(i);
}
h++;
}
}
}
while ((i = next(0)) < n)
aa[i] = qu[--cnt], mark(i);
for (i = 0; i < n; i++)
printf("%d%c", aa[i], i + 1 < n ? ' ' : '\n');
return 0;
}
Compilation message
rmq.c: In function 'main':
rmq.c:75:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
75 | scanf("%d%d", &n, &q);
| ^~~~~~~~~~~~~~~~~~~~~
rmq.c:77:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
77 | scanf("%d%d%d", &ll[h], &rr[h], &bb[h]);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
