| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 466681 | jli12345 | Wall (IOI14_wall) | C++14 | 0 ms | 0 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <wall.h>
pair<int, int> st[8000100];
pair<int, int> combine(pair<int, int> orig, pair<int, int> upd){
if (upd.second > orig.first){
return {upd.second, upd.second};
} else if (upd.first < orig.second){
return {upd.first, upd.first};
} else {
return {min(orig.first, upd.first), max(orig.second, upd.second)};
}
}
void pushdown(int node){
st[node*2] = combine(st[node*2], st[node]);
st[node*2+1] = combine(st[node*2+1], st[node]);
}
void U(int node, int l, int r, int tl, int tr, pair<int, int> upd){
if (l >tr || r < tl)
return;
if (l >= tl && r <= tr){
st[node] = combine(st[node], upd);
//cout << l << " " << r << " " << st[node].first << " " << st[node].second << "\n";
return;
}
pushdown(node);
int mid = (l+r)/2;
U(node*2, l, mid, tl, tr, upd);
U(node*2+1, mid+1, r, tl, tr, upd);
st[node].first = max(st[node*2].first, st[node*2+1].first);
st[node].second = min(st[node*2].second, st[node*2+1].second);
}
int Q(int node, int l, int r, int ind){
if (l > ind || r < ind){
return 0;
}
if (l == r){
return st[node].first;
}
pushdown(node);
int mid = (l+r)/2;
st[node].first = max(st[node*2].first, st[node*2+1].first);
st[node].second = min(st[node*2].second, st[node*2+1].second);
return max(Q(node*2, l, mid, ind), Q(node*2+1, mid+1, r, ind));
}
void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]){
for (int i = 0; i < k; i++){
if (op[i] == 1){
U(1, 0, n-1, left[i], right[i], {0x3f3f3f3f, height[i]});
} else {
U(1, 0, n-1, left[i], right[i], {height[i], 0});
}
}
for (int i = 0; i < n; i++){
finalHeight[i] = Q(1, 0, n-1, i);
}
}