#include <stdio.h>
#define N 200000
int max(int a, int b) { return a > b ? a : b; }
unsigned int X = 12345;
int rand_() {
return (X *= 3) >> 1;
}
int xx[N * 2];
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)
if (xx[ii[j]] == xx[i_])
j++;
else if (xx[ii[j]] < xx[i_]) {
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 main() {
static int ii[N * 2], dd[N * 2];
int n, q, i, x, ans;
scanf("%d", &n);
for (i = 0; i < n; i++)
scanf("%d%d", &xx[i << 1 | 0], &xx[i << 1 | 1]), xx[i << 1 | 1]++;
for (i = 0; i < n * 2; i++)
ii[i] = i;
sort(ii, 0, n * 2);
for (i = 0, x = 0; i < n * 2; i++)
xx[ii[i]] = i + 1 == n * 2 || xx[ii[i + 1]] != xx[ii[i]] ? x++ : x;
for (i = 0; i < n; i++)
dd[xx[i << 1 | 0]]++, dd[xx[i << 1 | 1]]--;
for (i = 1; i < n * 2; i++)
dd[i] += dd[i - 1];
ans = 0;
for (i = 0; i < n * 2; i++)
ans = max(ans, dd[i]);
printf("%d\n", ans);
scanf("%d", &q);
return 0;
}
Compilation message
Main.c: In function 'main':
Main.c:38:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
38 | scanf("%d", &n);
| ^~~~~~~~~~~~~~~
Main.c:40:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
40 | scanf("%d%d", &xx[i << 1 | 0], &xx[i << 1 | 1]), xx[i << 1 | 1]++;
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.c:54:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
54 | scanf("%d", &q);
| ^~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
106 ms |
4788 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
3 ms |
332 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
3 ms |
332 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
111 ms |
4988 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
106 ms |
4788 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
