int test() { SegmentTree st; st.initialize(14, 100); st.insert(0, 45); st.insert(1, 4); st.insert(2, 5); st.insert(3, 2); st.insert(4, 99); st.insert(5, 41); st.insert(6, 45); st.insert(7, 45); st.insert(8, 51); st.insert(9, 89); st.insert(10, 1); st.insert(11, 3); st.insert(12, 5); st.insert(13, 98); vi_t v; v.push_back(45); v.push_back(4); v.push_back(5); v.push_back(2); v.push_back(99); v.push_back(41); v.push_back(45); v.push_back(45); v.push_back(51); v.push_back(89); v.push_back(1); v.push_back(3); v.push_back(5); v.push_back(98); for (int i = 0; i < 14; ++i) { for (int j = i; j < 14; ++j) { pii_t one = st.query_min(i, j); pii_t two = naive_query_min(v, i, j); printf("query_min(%d, %d) == (%d, %d)\n", i, j, one.INDEX, two.INDEX); assert(one.LENGTH == two.LENGTH); } } return 0; }
// 'rin' is the input range set // // 'rout' is the output range set. It is guaranteed that 'rout' // contains the mapping needed to re-contruct the least number of // ranges needed to represent the complete range. Start with rout[0] // and keep following the indexes till you reach some 'k' for which // rout[k] == n. // // rout[i] contains the next index within rout (in sorted string // order) where you need to jump to find the next range that completes // the smallest number of ranges that cover the entire range. // // you will need to index into 'slcp' to locate the index of this // range in the original string // void compress_ranges(vi_t &rin, vi_t &rout) { SegmentTree st; rout.clear(); if (rin.empty()) { return; } const int n = rin.size(); st.initialize(n + 1, n + 1); rout.resize(n); st.insert(n, 0); for (int i = rin.size() - 1; i >= 0; --i) { assert(rin[i] > 0); int l = i + 1, r = std::min(n, i+rin[i]); pii_t m = st.query_min(l, r); rout[i] = m.INDEX; st.insert(i, m.LENGTH + 1); } }
int main() { int test; scanf("%d",&test); while(test--) { scanf("%d",&n); int cnt = 0; for(int i=0; i<n; i++) { scanf("%d",&h[i]); rec[cnt++] = h[i]; } std::sort(rec,rec+cnt); rcnt = 1; for(int i=0; i<cnt; i++) if(i == 0 || rec[i]!=rec[i-1]) { real[rcnt++] = rec[i]; } for(int i=0; i<n; i++) conh[i] = find(h[i]); SegmentTree sgt = SegmentTree(); sgt.build(1,0,n); for(int i=0; i<n; i++) { int cur = sgt.query(1,conh[i]+1,n,1); if(cur >= 0) sgt.insert(1,conh[i],conh[i],0,cur+1); // printf("to be low %d ",cur); cur = sgt.query(1,0,conh[i]-1,0); if(cur >= 0) sgt.insert(1,conh[i],conh[i],1,cur+1); // printf("to be high %d\n",cur); } int ans = Max(sgt.query(1,0,n,0),sgt.query(1,0,n,1)); printf("%d\n",ans); } return 0; }