Submission #767224

#TimeUsernameProblemLanguageResultExecution timeMemory
767224Dan4LifeVinjete (COI22_vinjete)C++17
100 / 100
492 ms522108 KiB
#include <bits/stdc++.h> using namespace std; #define fi first #define se second #define pb push_back #define mp make_pair const int mxN = (int)1e5+10; const int Lg = (int)4e2; int n, mx, IND = 1; int seg[mxN*Lg], lzy[mxN*Lg]; vector<array<int,3>> adj[mxN]; int ans[mxN], root[mxN], L[mxN*Lg], R[mxN*Lg]; int newLeaf(int v){ int p = ++IND; seg[p]=v; return p; } int newParent(int l, int r){ int p = ++IND; L[p]=l, R[p]=r; lzy[p]=-1; seg[p] = seg[L[p]]+seg[R[p]]; return p; } int newlzyChild(int p, int v, int l, int r){ int ind = ++IND; L[ind] = L[p]; R[ind] = R[p]; lzy[ind] = v; seg[ind] = (r-l+1)*v; return ind; } void prop(int p, int l, int r){ if(!p or l==r or lzy[p]==-1) return; int mid = (l+r)/2; if(!L[p]) L[p]=++IND; if(!R[p]) R[p]=++IND; L[p] = newlzyChild(L[p],lzy[p],l,mid); R[p] = newlzyChild(R[p],lzy[p],mid+1,r); lzy[p]=-1; } int upd(int i, int j, int v, int p, int l=1, int r=mx){ if(i>r or j<l or i>j or !p) return p; prop(p,l,r); if(i<=l and r<=j) return newlzyChild(p,v,l,r); int mid = (l+r)/2; if(!L[p] and i<=mid) L[p]=++IND; if(!R[p] and j>mid) R[p]=++IND; return newParent(upd(i,j,v,L[p],l,mid),upd(i,j,v,R[p],mid+1,r)); } void dfs(int s, int p){ ans[s] = seg[root[s]]; for(auto [u,v,w] : adj[s]) if(u!=p) root[u] = upd(v,w,1,root[s]), dfs(u,s); } int32_t main() { ios_base::sync_with_stdio(false); cin.tie(0); cin >> n >> mx; root[1] = 1; memset(lzy,-1,sizeof(lzy)); for(int i = 1; i < n; i++){ int a, b, l, r; cin >> a >> b >> l >> r; adj[a].pb({b,l,r}), adj[b].pb({a,l,r}); } dfs(1,0); for(int i = 2; i <= n; i++) cout << ans[i] << "\n"; }

Compilation message (stderr)

Main.cpp: In function 'int upd(int, int, int, int, int, int)':
Main.cpp:42:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   42 |  if(i>r or j<l or i>j or !p) return p; prop(p,l,r);
      |  ^~
Main.cpp:42:40: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   42 |  if(i>r or j<l or i>j or !p) return p; prop(p,l,r);
      |                                        ^~~~
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