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2 years ago
#include <bits/stdc++.h>
using namespace std;
int const N = 50010;
int n, m;
// 树状数组模板
int c1[N], c2[N];
#define lowbit(x) (x & -x)
typedef long long LL;
void add(int c[], int x, int d) {
for (int i = x; i < N; i += lowbit(i)) c[i] += d;
}
LL sum(int c[], int x) {
LL res = 0;
for (int i = x; i; i -= lowbit(i)) res += c[i];
return res;
}
int main() {
#ifndef ONLINE_JUDGE
freopen("LOJ10115.in", "r", stdin);
#endif
int k, l, r;
scanf("%d%d", &n, &m); // 第一行 n,m 表示道路总长为 n共有 m 个操作;
// n下面没有使用过。为什么呢其实是n的上限N有用我们就没有用到n,代码模板中也去掉了n的
for (int i = 1; i <= m; i++) {
scanf("%d%d%d", &k, &l, &r);
if (k == 1)
add(c1, l, 1), add(c2, r, 1); // c1记录左括号的个数c2记录右括号的个数
else
printf("%lld\n", sum(c1, r) - sum(c2, l - 1));
}
return 0;
}