| 比赛 |
ICPC复现(AI数据) |
评测结果 |
AAAAAAAAAAAA |
| 题目名称 |
来点离线做法 |
最终得分 |
100 |
| 用户昵称 |
RpUtl |
运行时间 |
5.118 s |
| 代码语言 |
C++ |
内存使用 |
126.23 MiB |
| 提交时间 |
2026-05-26 19:12:05 |
显示代码纯文本
#include <bits/stdc++.h>
using namespace std;
int main() {
freopen("lixian.in","r",stdin);
freopen("lixian.out","w",stdout);
ios::sync_with_stdio(false);
cin.tie(nullptr);
int n, q;
cin >> n >> q;
vector<int> a(n);
int max_a = 0;
for (int i = 0; i < n; ++i) {
cin >> a[i];
max_a = max(max_a, a[i]);
}
int V = max_a;
int B = max(1, (int)sqrt(n));
int M = (n + B - 1) / B;
vector<vector<int>> pre(M + 1, vector<int>(V + 1, 0));
vector<vector<long long>> f(M + 1, vector<long long>(B + 1, 0));
for (int i = 1; i <= M; ++i) {
memcpy(pre[i].data(), pre[i - 1].data(), (V + 1) * sizeof(int));
memcpy(f[i].data(), f[i - 1].data(), (B + 1) * sizeof(long long));
int L = (i - 1) * B;
int R = min(i * B, n);
for (int pos = L; pos < R; ++pos) {
int x = a[pos];
pre[i][x]++;
for (int k = 1; k <= B; ++k) {
f[i][k] += x / k;
}
}
}
for (int i = 0; i <= M; ++i) {
for (int x = 1; x <= V; ++x) {
pre[i][x] += pre[i][x - 1];
}
}
while (q--) {
int l, r, k;
cin >> l >> r >> k;
--l; --r;
int lb = l / B, rb = r / B;
long long ans = 0;
if (lb == rb) {
for (int i = l; i <= r; ++i) ans += a[i] / k;
} else {
int end_left = (lb + 1) * B;
for (int i = l; i < end_left; ++i) ans += a[i] / k;
int start_right = rb * B;
for (int i = start_right; i <= r; ++i) ans += a[i] / k;
if (lb + 1 <= rb - 1) {
if (k <= B) {
ans += f[rb][k] - f[lb + 1][k];
} else {
int max_v = V / k;
for (int v = 0; v <= max_v; ++v) {
int low = v * k;
int high = min((v + 1) * k - 1, V);
int cnt = pre[rb][high] - (low > 0 ? pre[rb][low - 1] : 0)
- (pre[lb + 1][high] - (low > 0 ? pre[lb + 1][low - 1] : 0));
ans += 1LL * v * cnt;
}
}
}
}
cout << ans << '\n';
}
return 0;
}