結果
問題 | No.924 紲星 |
ユーザー | polylogK |
提出日時 | 2019-09-06 01:10:30 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 2,566 ms / 4,000 ms |
コード長 | 3,387 bytes |
コンパイル時間 | 2,139 ms |
コンパイル使用メモリ | 184,296 KB |
実行使用メモリ | 22,220 KB |
最終ジャッジ日時 | 2024-09-15 05:32:22 |
合計ジャッジ時間 | 22,194 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | AC | 5 ms
5,376 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 5 ms
5,376 KB |
testcase_06 | AC | 4 ms
5,376 KB |
testcase_07 | AC | 2 ms
5,376 KB |
testcase_08 | AC | 2,565 ms
22,092 KB |
testcase_09 | AC | 2,566 ms
22,220 KB |
testcase_10 | AC | 2,470 ms
22,092 KB |
testcase_11 | AC | 2,383 ms
22,216 KB |
testcase_12 | AC | 2,418 ms
22,088 KB |
testcase_13 | AC | 1,102 ms
12,964 KB |
testcase_14 | AC | 1,126 ms
12,268 KB |
testcase_15 | AC | 1,002 ms
10,636 KB |
testcase_16 | AC | 778 ms
15,660 KB |
testcase_17 | AC | 1,808 ms
16,408 KB |
testcase_18 | AC | 2 ms
5,376 KB |
ソースコード
#include <bits/stdc++.h> using namespace std::literals::string_literals; using i64 = long long; using std::cout; using std::endl; using std::cin; template<typename T> std::vector<T> make_v(size_t a){return std::vector<T>(a);} template<typename T,typename... Ts> auto make_v(size_t a,Ts... ts){ return std::vector<decltype(make_v<T>(ts...))>(a,make_v<T>(ts...)); } struct SegmentTree { private: int n; std::vector<i64> node; public: SegmentTree(int sz) { n = 1; while(n < sz) n *= 2; node.resize(2*n-1, 0); } void update(int x, i64 val) { x += (n - 1); node[x] += val; while(x > 0) { x = (x - 1) / 2; node[x] = node[2*x+1] + node[2*x+2]; } } i64 get(int a, int b, int k=0, int l=0, int r=-1) { if(r < 0) r = n; if(r <= a || b <= l) return 0; if(a <= l && r <= b) return node[k]; i64 vl = get(a, b, 2*k+1, l, (l+r)/2); i64 vr = get(a, b, 2*k+2, (l+r)/2, r); return vl + vr; } }; int main() { // input int n, q; scanf("%d%d", &n, &q); assert(1 <= n and n <= 2e5); assert(1 <= q and q <= 2e5); std::vector<int> a(n); for(int i = 0; i < n; i++) { scanf("%d", &a[i]); assert(-1e9 <= a[i] and a[i] <= 1e9); } std::vector<int> L(q), R(q); for(int i = 0; i < q; i++) { scanf("%d%d", &L[i], &R[i]); assert(1 <= L[i] and L[i] <= n); assert(1 <= R[i] and R[i] <= n); assert(L[i] <= R[i]); L[i]--; } // solve std::vector<std::pair<int, int>> vec; for(int i = 0; i < n; i++) vec.push_back({a[i], i}); sort(begin(vec), end(vec)); std::vector<i64> center = [&]{ using P = std::pair<int, int>; std::vector<int> Left(q, -1), Right(q, n); std::vector<std::pair<int, int>> query, nxt; for(int i = 0; i < q; i++) query.push_back({(Left[i] + Right[i]) >> 1, i}); while(!query.empty()) { sort(begin(query), end(query)); int cur = 0; SegmentTree seg(n); for(int i = 0; i < n; i++) { seg.update(vec[i].second, 1); while(cur < query.size() and query[cur].first <= i) { auto & p = query[cur++]; int id = p.second, mid = p.first; int len = (R[id] - L[id] + 1) >> 1; int val = seg.get(L[id], R[id]); if(len <= val) Right[id] = mid; else Left[id] = mid; if(Left[id] + 1 != Right[id]) nxt.push_back({(Left[id] + Right[id]) >> 1, id}); } } query.swap(nxt); nxt.clear(); } std::vector<i64> center(q); for(int i = 0; i < q; i++) center[i] = vec[Left[i] + 1].first; return center; }(); std::vector<i64> ans = [&]{ std::vector<i64> ans(q); for(int loop = 0; loop < 2; loop++) { SegmentTree seg(n), cnt(n); std::vector<std::pair<int, int>> query; for(int i = 0; i < q; i++) query.push_back({center[i], i}); sort(begin(query), end(query)); if(loop) reverse(begin(query), end(query)); int cur = 0; for(int i = 0; i < n; i++) { seg.update(vec[i].second, vec[i].first); cnt.update(vec[i].second, 1); while(cur < query.size() and query[cur].first == vec[i].first) { auto & p = query[cur++]; i64 id = p.second, val = p.first; i64 tmp = val * cnt.get(L[id], R[id]) - seg.get(L[id], R[id]); ans[id] += tmp * (loop ? -1 : 1); } } reverse(begin(vec), end(vec)); } return ans; }(); for(auto v: ans) printf("%lld\n", v); return 0; }