結果
問題 | No.876 Range Compress Query |
ユーザー | tsutaj |
提出日時 | 2019-09-06 22:34:29 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 8,080 bytes |
コンパイル時間 | 1,357 ms |
コンパイル使用メモリ | 117,224 KB |
実行使用メモリ | 6,784 KB |
最終ジャッジ日時 | 2024-06-24 19:59:46 |
合計ジャッジ時間 | 5,449 ms |
ジャッジサーバーID (参考情報) |
judge1 / 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 | 3 ms
5,376 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | AC | 4 ms
5,376 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | AC | 4 ms
5,376 KB |
testcase_07 | AC | 3 ms
5,376 KB |
testcase_08 | AC | 4 ms
5,376 KB |
testcase_09 | AC | 3 ms
5,376 KB |
testcase_10 | AC | 4 ms
5,376 KB |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | WA | - |
testcase_18 | WA | - |
ソースコード
// #define _GLIBCXX_DEBUG // for STL debug (optional) #include <iostream> #include <iomanip> #include <cstdio> #include <string> #include <cstring> #include <deque> #include <list> #include <queue> #include <stack> #include <vector> #include <utility> #include <algorithm> #include <map> #include <set> #include <complex> #include <cmath> #include <limits> #include <cfloat> #include <climits> #include <ctime> #include <cassert> #include <numeric> #include <fstream> #include <functional> #include <bitset> using namespace std; using ll = long long int; using int64 = long long int; template<typename T> void chmax(T &a, T b) {a = max(a, b);} template<typename T> void chmin(T &a, T b) {a = min(a, b);} template<typename T> void chadd(T &a, T b) {a = a + b;} int dx[] = {0, 0, 1, -1}; int dy[] = {1, -1, 0, 0}; const int INF = 1 << 28; const ll MOD = 1000000007LL; template <typename MonoidType, typename OperatorType> struct LazySegmentTree { using MMtoM = function< MonoidType(MonoidType, MonoidType) >; using OOtoO = function< OperatorType(OperatorType, OperatorType) >; using MOtoM = function< MonoidType(MonoidType, OperatorType) >; using OItoO = function< OperatorType(OperatorType, int) >; // node, lazy, update flag (for lazy), identity element int n; vector<MonoidType> node; vector<OperatorType> lazy; vector<bool> need_update; MonoidType E0; OperatorType E1; // update / combine / lazy / accumulate function MOtoM upd_f; MMtoM cmb_f; OOtoO lzy_f; OItoO acc_f; void build(int m, vector<MonoidType> v = vector<MonoidType>()) { if(v != vector<MonoidType>()) m = v.size(); n = 1; while(n < m) n *= 2; node = vector<MonoidType>(2*n-1, E0); lazy = vector<OperatorType>(2*n-1, E1); need_update = vector<bool>(2*n-1, false); if(v != vector<MonoidType>()) { for(int i=0; i<m; i++) { node[n-1+i] = v[i]; } for(int i=n-2; i>=0; i--) { node[i] = cmb_f(node[2*i+1], node[2*i+2]); } } } // initialize LazySegmentTree() {} LazySegmentTree(int n_, MonoidType E0_, OperatorType E1_, MOtoM upd_f_, MMtoM cmb_f_, OOtoO lzy_f_, OItoO acc_f_, vector<MonoidType> v = vector<MonoidType>()) : E0(E0_), E1(E1_), upd_f(upd_f_), cmb_f(cmb_f_), lzy_f(lzy_f_), acc_f(acc_f_) { build(n_, v); } void eval(int k, int l, int r) { if(!need_update[k]) return; node[k] = upd_f(node[k], acc_f(lazy[k], r - l)); if(r - l > 1) { lazy[2*k+1] = lzy_f(lazy[2*k+1], lazy[k]); lazy[2*k+2] = lzy_f(lazy[2*k+2], lazy[k]); need_update[2*k+1] = need_update[2*k+2] = true; } lazy[k] = E1; need_update[k] = false; } void update(int a, int b, OperatorType x, int l, int r, int k) { eval(k, l, r); if(b <= l or r <= a) return; if(a <= l and r <= b) { lazy[k] = lzy_f(lazy[k], x); need_update[k] = true; eval(k, l, r); } else { int mid = (l + r) / 2; update(a, b, x, l, mid, 2*k+1); update(a, b, x, mid, r, 2*k+2); node[k] = cmb_f(node[2*k+1], node[2*k+2]); } } MonoidType query(int a, int b, int l, int r, int k) { if(b <= l or r <= a) return E0; eval(k, l, r); if(a <= l and r <= b) return node[k]; int mid = (l + r) / 2; MonoidType vl = query(a, b, l, mid, 2*k+1); MonoidType vr = query(a, b, mid, r, 2*k+2); return cmb_f(vl, vr); } // update [a, b)-th element (applied value, x) void update(int a, int b, OperatorType x) { update(a, b, x, 0, n, 0); } // range query for [a, b) MonoidType query(int a, int b) { return query(a, b, 0, n, 0); } void dump() { fprintf(stderr, "[lazy]\n"); for(int i=0; i<2*n-1; i++) { if(i == n-1) fprintf(stderr, "xxx "); if(lazy[i] == E1) fprintf(stderr, " E "); else fprintf(stderr, "%3d ", lazy[i]); } fprintf(stderr, "\n"); fprintf(stderr, "[node]\n"); for(int i=0; i<2*n-1; i++) { if(i == n-1) fprintf(stderr, "xxx "); if(node[i] == E0) fprintf(stderr, " E "); else fprintf(stderr, "%3d ", node[i]); } fprintf(stderr, "\n"); } }; // 抽象 SegmentTree (0-indexed・一点更新・区間取得) template <typename MonoidType> struct SegmentTree { using Function = function< MonoidType(MonoidType, MonoidType) >; // node, identity element int n; vector<MonoidType> node; MonoidType E0; // update / combine function Function upd_f, cmb_f; void build(int m, vector<MonoidType> v = vector<MonoidType>()) { if(v != vector<MonoidType>()) m = v.size(); n = 1; while(n < m) n *= 2; node = vector<MonoidType>(2*n-1, E0); if(v != vector<MonoidType>()) { for(int i=0; i<m; i++) { node[n-1+i] = v[i]; } for(int i=n-2; i>=0; i--) { node[i] = cmb_f(node[2*i+1], node[2*i+2]); } } } // initialize SegmentTree() {} SegmentTree(int n_, MonoidType E0_, Function upd_f_, Function cmb_f_, vector<MonoidType> v = vector<MonoidType>()) : E0(E0_), upd_f(upd_f_), cmb_f(cmb_f_) { build(n_, v); } // update k-th element (applied value: x) void update(int k, MonoidType x) { k += n - 1; node[k] = upd_f(node[k], x); while(k > 0) { k = (k - 1) / 2; node[k] = cmb_f(node[2*k+1], node[2*k+2]); } } // range query for [a, b) // 非再帰のアイデア: http://d.hatena.ne.jp/komiyam/20131202/1385992406 MonoidType query(int a, int b) { MonoidType vl = E0, vr = E0; for(int l=a+n, r=b+n; l<r; l>>=1, r>>=1) { if(l & 1) vl = cmb_f(vl, node[(l++)-1]); if(r & 1) vr = cmb_f(node[(--r)-1], vr); } return cmb_f(vl, vr); } }; int main() { int N, Q; cin >> N >> Q; LazySegmentTree<int, int> seg1(N, 0, 0, [](int a, int b) { return a + b; }, [](int a, int b) { return max(a, b); }, [](int a, int b) { return a + b; }, [](int a, int x) { return a; }); SegmentTree<int> seg2(N, 0, [](int a, int b) { return b; }, [](int a, int b) { return a + b; }); vector<int> A(N); for(int i=0; i<N; i++) { cin >> A[i]; seg1.update(i, i+1, A[i]); if(i) seg2.update(i, A[i-1] != A[i]); } while(Q--) { int q; cin >> q; if(q == 1) { int l, r, x; cin >> l >> r >> x; l--; r--; seg1.update(l, r+1, x); // l の左 if(l - 1 >= 0) { int vl = seg1.query(l-1, l); int vr = seg1.query(l, l+1); seg2.update(l, (vl != vr)); } // r の右 if(r + 1 < N) { int vl = seg1.query(r, r+1); int vr = seg1.query(r+1, r+2); seg2.update(r+1, (vl != vr)); } } if(q == 2) { int l, r; cin >> l >> r; l--; if(r - l == 1) { cout << 1 << endl; } else { cout << seg2.query(l+1, r) + 1 << endl; } } /* for(int i=0; i<N; i++) { fprintf(stderr, "%d ", seg1.query(i, i+1)); } fprintf(stderr, "\n"); for(int i=0; i<N; i++) { fprintf(stderr, "%d ", seg2.query(i, i+1)); } fprintf(stderr, "\n"); */ } return 0; }