Submission #722611

#TimeUsernameProblemLanguageResultExecution timeMemory
722611penguin133Wall (IOI14_wall)C++17
61 / 100
863 ms262144 KiB
#include <bits/stdc++.h> #include "wall.h" using namespace std; //#define int long long #define pi pair<int, int> #define pii pair<int, pi> #define fi first #define se second #ifdef _WIN32 #define getchar_unlocked _getchar_nolock #endif mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count()); using ll = long long; const int MAXN = 2000001; // 1-based int N; ll A[MAXN]; struct Node { ll sum; // Sum tag ll max1; // Max value ll max2; // Second Max value ll maxc; // Max value count ll min1; // Min value ll min2; // Second Min value ll minc; // Min value count ll lazy; // Lazy tag } T[MAXN * 4]; void merge(int t) { // sum T[t].sum = T[t << 1].sum + T[t << 1 | 1].sum; // max if (T[t << 1].max1 == T[t << 1 | 1].max1) { T[t].max1 = T[t << 1].max1; T[t].max2 = max(T[t << 1].max2, T[t << 1 | 1].max2); T[t].maxc = T[t << 1].maxc + T[t << 1 | 1].maxc; } else { if (T[t << 1].max1 > T[t << 1 | 1].max1) { T[t].max1 = T[t << 1].max1; T[t].max2 = max(T[t << 1].max2, T[t << 1 | 1].max1); T[t].maxc = T[t << 1].maxc; } else { T[t].max1 = T[t << 1 | 1].max1; T[t].max2 = max(T[t << 1].max1, T[t << 1 | 1].max2); T[t].maxc = T[t << 1 | 1].maxc; } } // min if (T[t << 1].min1 == T[t << 1 | 1].min1) { T[t].min1 = T[t << 1].min1; T[t].min2 = min(T[t << 1].min2, T[t << 1 | 1].min2); T[t].minc = T[t << 1].minc + T[t << 1 | 1].minc; } else { if (T[t << 1].min1 < T[t << 1 | 1].min1) { T[t].min1 = T[t << 1].min1; T[t].min2 = min(T[t << 1].min2, T[t << 1 | 1].min1); T[t].minc = T[t << 1].minc; } else { T[t].min1 = T[t << 1 | 1].min1; T[t].min2 = min(T[t << 1].min1, T[t << 1 | 1].min2); T[t].minc = T[t << 1 | 1].minc; } } } void push_add(int t, int tl, int tr, ll v) { if (v == 0) { return; } T[t].sum += (tr - tl + 1) * v; T[t].max1 += v; if (T[t].max2 != -1e18) { T[t].max2 += v; } T[t].min1 += v; if (T[t].min2 != 1e18) { T[t].min2 += v; } T[t].lazy += v; } // corresponds to a chmin update void push_max(int t, ll v, bool l) { if (v >= T[t].max1) { return; } T[t].sum -= T[t].max1 * T[t].maxc; T[t].max1 = v; T[t].sum += T[t].max1 * T[t].maxc; if (l) { T[t].min1 = T[t].max1; } else { if (v <= T[t].min1) { T[t].min1 = v; } else if (v < T[t].min2) { T[t].min2 = v; } } } // corresponds to a chmax update void push_min(int t, ll v, bool l) { if (v <= T[t].min1) { return; } T[t].sum -= T[t].min1 * T[t].minc; T[t].min1 = v; T[t].sum += T[t].min1 * T[t].minc; if (l) { T[t].max1 = T[t].min1; } else { if (v >= T[t].max1) { T[t].max1 = v; } else if (v > T[t].max2) { T[t].max2 = v; } } } void pushdown(int t, int tl, int tr) { if (tl == tr) return; // sum int tm = (tl + tr) >> 1; push_add(t << 1, tl, tm, T[t].lazy); push_add(t << 1 | 1, tm + 1, tr, T[t].lazy); T[t].lazy = 0; // max push_max(t << 1, T[t].max1, tl == tm); push_max(t << 1 | 1, T[t].max1, tm + 1 == tr); // min push_min(t << 1, T[t].min1, tl == tm); push_min(t << 1 | 1, T[t].min1, tm + 1 == tr); } void build(int t = 1, int tl = 0, int tr = N - 1) { T[t].lazy = 0; if (tl == tr) { T[t].sum = T[t].max1 = T[t].min1 = A[tl]; T[t].maxc = T[t].minc = 1; T[t].max2 = -1e18; T[t].min2 = 1e18; return; } int tm = (tl + tr) >> 1; build(t << 1, tl, tm); build(t << 1 | 1, tm + 1, tr); merge(t); } void update_add(int l, int r, ll v, int t = 1, int tl = 0, int tr = N - 1) { if (r < tl || tr < l) { return; } if (l <= tl && tr <= r) { push_add(t, tl, tr, v); return; } pushdown(t, tl, tr); int tm = (tl + tr) >> 1; update_add(l, r, v, t << 1, tl, tm); update_add(l, r, v, t << 1 | 1, tm + 1, tr); merge(t); } void update_chmin(int l, int r, ll v, int t = 1, int tl = 0, int tr = N - 1) { if (r < tl || tr < l || v >= T[t].max1) { return; } if (l <= tl && tr <= r && v > T[t].max2) { push_max(t, v, tl == tr); return; } pushdown(t, tl, tr); int tm = (tl + tr) >> 1; update_chmin(l, r, v, t << 1, tl, tm); update_chmin(l, r, v, t << 1 | 1, tm + 1, tr); merge(t); } void update_chmax(int l, int r, ll v, int t = 1, int tl = 0, int tr = N - 1) { if (r < tl || tr < l || v <= T[t].min1) { return; } if (l <= tl && tr <= r && v < T[t].min2) { push_min(t, v, tl == tr); return; } pushdown(t, tl, tr); int tm = (tl + tr) >> 1; update_chmax(l, r, v, t << 1, tl, tm); update_chmax(l, r, v, t << 1 | 1, tm + 1, tr); merge(t); } ll query_sum(int l, int r, int t = 1, int tl = 0, int tr = N - 1) { if (r < tl || tr < l) { return 0; } if (l <= tl && tr <= r) { return T[t].sum; } pushdown(t, tl, tr); int tm = (tl + tr) >> 1; return query_sum(l, r, t << 1, tl, tm) + query_sum(l, r, t << 1 | 1, tm + 1, tr); } void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]){ N = n; build(); for(int i=0;i<k;i++){ if(op[i] == 1)update_chmax(left[i], right[i], height[i]); else update_chmin(left[i], right[i], height[i]); } for(int i=0;i<n;i++)finalHeight[i] = query_sum(i, i); }
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