Submission #563029

#TimeUsernameProblemLanguageResultExecution timeMemory
563029SebWall (IOI14_wall)C++17
100 / 100
916 ms99296 KiB
#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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