# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|
563029 | | Seb | Wall (IOI14_wall) | C++17 | | 916 ms | 99296 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 <bits/stdc++.h>
#include <wall.h>
using namespace std;
typedef int ll;
ll N;
struct Node{
ll top, bot;
Node() : top(-1LL), bot(-1LL) {}
};
void push(Node st[], ll nodo, ll ini, ll fin) {
if (ini!=fin) {
if (st[nodo].top!=-1) {
if (st[nodo*2].top!=-1) st[nodo*2].top = min(st[nodo*2].top,st[nodo].top);
else st[nodo*2].top = st[nodo].top;
if (st[nodo*2+1].top!=-1) st[nodo*2+1].top = min(st[nodo*2+1].top,st[nodo].top);
else st[nodo*2+1].top = st[nodo].top;
if (st[nodo*2].bot>st[nodo*2].top) st[nodo*2].bot = st[nodo*2].top;
if (st[nodo*2+1].bot>st[nodo*2+1].top) st[nodo*2+1].bot = st[nodo*2+1].top;
st[nodo].top = -1;
}
if (st[nodo].bot!=-1) {
if (st[nodo*2].bot!=-1) st[nodo*2].bot = max(st[nodo*2].bot,st[nodo].bot);
else st[nodo*2].bot = st[nodo].bot;
if (st[nodo*2+1].bot!=-1) st[nodo*2+1].bot = max(st[nodo*2+1].bot,st[nodo].bot);
else st[nodo*2+1].bot = st[nodo].bot;
if (st[nodo*2].top!=-1 && st[nodo*2].bot>st[nodo*2].top) st[nodo*2].top = st[nodo*2].bot;
if (st[nodo*2+1].top!=-1 && st[nodo*2+1].bot>st[nodo*2+1].top) st[nodo*2+1].top = st[nodo*2+1].bot;
st[nodo].bot = -1;
}
}
return;
}
void merger(Node st[], Node aux, ll nodo) {
if (aux.top!=-1) {
if (st[nodo].top!=-1) st[nodo].top = min(st[nodo].top,aux.top);
else st[nodo].top = aux.top;
if (st[nodo].bot>st[nodo].top) st[nodo].bot = st[nodo].top;
}
if (aux.bot!=-1) {
if (st[nodo].bot!=-1) st[nodo].bot = max(st[nodo].bot,aux.bot);
else st[nodo].bot = aux.bot;
if (st[nodo].top!=-1 && st[nodo].bot>st[nodo].top) st[nodo].top = st[nodo].bot;
}
return;
}
void update(Node st[], ll caso, ll l, ll r, ll delta, ll nodo = 1, ll ini = 0, ll fin = N-1) {
push(st,nodo,ini,fin);
if (ini>r || fin<l) return;
if (l<=ini && fin<=r) {
Node aux;
if (caso==1) aux.bot = delta;
else aux.top = delta;
merger(st,aux,nodo);
push(st,nodo,ini,fin);
return;
}
update(st,caso,l,r,delta,nodo*2,ini,(ini+fin)/2);
update(st,caso,l,r,delta,nodo*2+1,(ini+fin)/2+1,fin);
return;
}
void ans(Node st[], ll pos[], ll nodo = 1, ll ini = 0, ll fin = N-1) {
push(st,nodo,ini,fin);
if (ini==fin){
pos[ini] = max(st[nodo].bot,0);
return;
}
ans(st,pos,nodo*2,ini,(ini+fin)/2);
ans(st,pos,nodo*2+1,(ini+fin)/2+1,fin);
return;
}
void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]) {
N = n;
ll i,j;
Node st[4*n];
for (i=0;i<k;i++) update(st,op[i],left[i],right[i],height[i]);
ans(st,finalHeight);
return;
}
Compilation message (stderr)
wall.cpp: In function 'void buildWall(int, int, int*, int*, int*, int*, int*)':
wall.cpp:82:6: warning: unused variable 'j' [-Wunused-variable]
82 | ll i,j;
| ^
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