mirror of
https://git.sb/baoshuo/OI-codes.git
synced 2024-11-27 17:16:28 +00:00
39 lines
636 B
C++
39 lines
636 B
C++
#include <bits/stdc++.h>
|
|
|
|
using namespace std;
|
|
|
|
int n, m, op, x, y, t[10000005];
|
|
|
|
int lowbit(int k) {
|
|
return k & -k;
|
|
}
|
|
|
|
void add(int x, int v) {
|
|
for (int i = x; i <= n + 1; i += lowbit(i)) {
|
|
t[i] += v;
|
|
}
|
|
}
|
|
|
|
int sum(int x) {
|
|
int ans = 0;
|
|
for (int i = x; i > 0; i -= lowbit(i)) {
|
|
ans += t[i];
|
|
}
|
|
return ans;
|
|
}
|
|
|
|
int main() {
|
|
cin >> n >> m;
|
|
for (int i = 0; i < m; i++) {
|
|
cin >> op >> x;
|
|
if (op == 0) {
|
|
cin >> y;
|
|
add(x, 1);
|
|
add(y + 1, -1);
|
|
} else if (op == 1) {
|
|
cout << sum(x) << endl;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|