Submission #387927

#TimeUsernameProblemLanguageResultExecution timeMemory
387927Carmel_Ab1Trampoline (info1cup20_trampoline)C++17
0 / 100
2084 ms133028 KiB
#include<bits/stdc++.h> //#include <ext/pb_ds/assoc_container.hpp> //#include <ext/pb_ds/tree_policy.hpp> //using namespace __gnu_pbds; using namespace std; typedef long double ld; typedef long long ll; typedef unsigned long long ull; typedef vector<int>vi; typedef vector<vector<int>>vvi; typedef vector<ll>vl; typedef vector<vl> vvl; typedef pair<int,int>pi; typedef pair<ll,ll> pl; typedef vector<pl> vpl; typedef vector<ld> vld; typedef pair<ld,ld> pld; //typedef tree<ll, null_type, less_equal<ll>,rb_tree_tag,tree_order_statistics_node_update> ordered_set; template<typename T> ostream& operator<<(ostream& os, vector<T>& a){os<<"[";for(int i=0; i<ll(a.size()); i++){os << a[i] << ((i!=ll(a.size()-1)?" ":""));}os << "]\n"; return os;} #define all(x) x.begin(),x.end() #define YES out("YES") #define NO out("NO") #define out(x){cout << x << "\n"; return;} #define GLHF ios_base::sync_with_stdio(false); cin.tie(NULL) #define print(x){for(auto ait:x) cout << ait << " "; cout << "\n";} #define gcd __gcd #define popcount __builtin_popcountll #define mp make_pair template<typename T1, typename T2> istream& operator>>(istream& is, pair<T1, T2>& p){is >> p.first >> p.second;return is;} template<typename T1, typename T2> ostream& operator<<(ostream& os, pair<T1, T2>& p){os <<"" << p.first << " " << p.second << ""; return os;} void usaco(string taskname){ string fin = taskname + ".in"; string fout = taskname + ".out"; const char* FIN = fin.c_str(); const char* FOUT = fout.c_str(); freopen(FIN, "r", stdin); freopen(FOUT, "w", stdout); } template<typename T> void read(vector<T>& v){ int n=v.size(); for(int i=0; i<n; i++) cin >> v[i]; } template<typename T> vector<T>UNQ(vector<T>a){ vector<T>ans; for(T t:a) if(ans.empty() || t!=ans.back()) ans.push_back(t); return ans; } ll ceil(ll a,ll b){ ll ans=a/b; if(a%b)ans++; return ans; } ld log (ld a,ld b){return log(b)/log(a);} ll power(ll base, ll exp,ll M=1e9+7){//(base^exp)%M ll ans=1; while(exp){ if(exp%2==1)ans=((ans%M)*(base%M))%M; base=((base%M)*(base%M))%M; exp/=2; } return ans; } string to_base(int n,int new_base){ string s; int nn=n; while(nn){ s+=to_string(nn%new_base); nn/=new_base; } reverse(all(s)); return s; } ll lcm(ll a,ll b){ ll x= (a/gcd(a,b)); return b*x; } vl generate_array(ll n,ll mn=1,ll mx=1e18+1,bool permuatation=0){ if(permuatation){ vl a(n); for(int i=0; i<n; i++) a[i]=i+1; random_shuffle(all(a)); return a; } if(mx==1e18+1) mx=n; vl ans(n); for(int i=0; i<n;i++) ans[i]=(mn+rand()%(mx-mn+1)); return ans; } string substr(string s,int l,int r){ string ans; for(int i=l; i<=r; i++) ans+=s[i]; return ans; } void solve(); int main() { GLHF; int t = 1; //cin >> t; while (t--) solve(); } map<pl,vpl>dp; map<ll,set<ll>>who;//who in row i ll logn=30; ll get(ll i1,ll j1,ll i2){ if(who[i1].lower_bound(j1)==who[i1].end())return -1; j1=*who[i1].lower_bound(j1); pl cur={i1,j1}; ll len=i2-i1-1; if(len<0)return -1; for(int i=0; i<logn && len; i++){ if(len&(1<<i)){ len-=(1<<i); cur=dp[cur][i]; } } return cur.second; } void solve(){ ll r,c,n; cin >> r >> c >> n; map<pl,pl>nxt; vpl a; for(int i=0; i<n; i++){ int x,y; cin >> x >> y; who[x].insert(y); a.push_back({x,y}); } sort(all(a)); for(int i=0; i<n; i++){ if(!dp[a[i]].size()){ dp[a[i]].resize(logn); if(who[a[i].first+1].lower_bound(a[i].second)!=who[a[i].first+1].end()) dp[a[i]][0]= {a[i].first+1,*who[a[i].first+1].lower_bound(a[i].second)}; else dp[a[i]][0]={-1,-1}; } } for(int j=1; j<logn; j++) for(int i=0; i<n; i++) if(dp[a[i]][j-1].first!=-1) dp[a[i]][j]=dp[dp[a[i]][j-1]][j-1]; else dp[a[i]][j]={-1,-1}; ll q; cin >> q; while(q--){ ll i1,j1,i2,j2; cin >> i1 >> j1 >> i2 >> j2; if(i1>i2){cout << "No\n";continue;} if(i1==i2){ if(j1<=j2) cout << "Yes\n"; else cout << "No\n"; continue; } ll ans=get(i1,j1,i2); if(ans!=-1 && ans<=j2)cout << "Yes\n"; else cout << "No\n"; } }

Compilation message (stderr)

trampoline.cpp: In function 'void usaco(std::string)':
trampoline.cpp:40:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   40 |     freopen(FIN, "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~
trampoline.cpp:41:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   41 |     freopen(FOUT, "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~
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