Submission #1019131

#TimeUsernameProblemLanguageResultExecution timeMemory
1019131ttamxPyramid Base (IOI08_pyramid_base)C++17
80 / 100
5035 ms96336 KiB
#include<bits/stdc++.h> using namespace std; const int N=1e6+5; const int K=1<<21; const int INF=INT_MAX/2; int n,m,b,p; vector<tuple<int,int,int>> add[N],del[N]; struct SegTree{ int t[K],lz[K]; void apply(int i,int v){ t[i]+=v,lz[i]+=v; } void push(int i){ apply(i*2,lz[i]); apply(i*2+1,lz[i]); lz[i]=0; } void build(int l,int r,int i){ t[i]=0,lz[i]=0; if(l==r)return; int m=(l+r)/2; build(l,m,i*2); build(m+1,r,i*2+1); } void build(){ build(1,n,1); } void update(int l,int r,int i,int x,int y,int v){ if(y<l||r<x)return; if(x<=l&&r<=y)return apply(i,v); int m=(l+r)/2; push(i); update(l,m,i*2,x,y,v); update(m+1,r,i*2+1,x,y,v); t[i]=min(t[i*2],t[i*2+1]); } void update(int x,int y,int v){ update(1,n,1,x,y,v); } int query(int l,int r,int i,int x,int y){ if(y<l||r<x)return INF; if(x<=l&&r<=y)return t[i]; int m=(l+r)/2; push(i); return min(query(l,m,i*2,x,y),query(m+1,r,i*2+1,x,y)); } int query(int x,int y){ return query(1,n,1,x,y); } }seg; bool check(int k){ seg.build(); for(int i=1;i<=m;i++){ for(auto [l,r,v]:add[i])seg.update(l,r+k-1,v); if(i>=k)for(auto [l,r,v]:del[i-k])seg.update(l,r+k-1,-v); if(i>=k&&seg.query(k,n)<=b)return true; } return false; } int main(){ cin.tie(nullptr)->sync_with_stdio(false); cin >> m >> n >> b >> p; for(int i=0;i<p;i++){ int x1,y1,x2,y2,c; cin >> x1 >> y1 >> x2 >> y2 >> c; add[x1].emplace_back(y1,y2,c); del[x2].emplace_back(y1,y2,c); } int l=0,r=min(n,m); while(l<r){ int m=(l+r+1)/2; if(check(m))l=m; else r=m-1; } cout << l; }
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