Submission #933264

#	Time	Username	Problem	Language	Result	Execution time	Memory
933264		yeediot	Curtains (NOI23_curtains)	C++14	100 / 100	1037 ms	95196 KiB

curtains

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define F first
#define S second
#define all(x) x.begin(),x.end()
#define pii pair<int,int>
#define pb push_back
#define sz(x) (int)(x.size())
#define chmin(x,y) x=min(x,y)
#define chmax(x,y) x=max(x,y)
#define vi vector<int>
#define vp vector<pii>
#define vvi vector<vi>
#define ykh mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count())
#define __lg(x) 63-__builtin_clzll(x)
#define pow2(x) (1LL<<x)
void __print(int x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}

template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifdef local
void setio(){freopen("/Users/iantsai/Library/Mobile Documents/com~apple~CloudDocs/cpp/Empty.md","r",stdin);}
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
void setio(){}
#define debug(x...)
#endif
void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}
struct line{
    int a,b;
    int operator()(const int x)const{
        return a*x+b;
    }
};
bool check(line l1,line l2,line l3){
    return (l3.b-l2.b)*(l1.a-l2.a)<=(l2.b-l1.b)*(l2.a-l3.a);
}
const int mxn=5e5+5;
int seg[4*mxn];
int tag[4*mxn];
#define lc id*2
#define rc id*2+1
void push(int id){
    seg[lc]=max(seg[lc],tag[id]);
    seg[rc]=max(seg[rc],tag[id]);
    tag[lc]=max(tag[lc],tag[id]);
    tag[rc]=max(tag[rc],tag[id]);
    tag[id]=0;
}
void modify(int l,int r,int id,int ql,int qr,int v){
    if(qr<l or r<ql)return;
    if(ql<=l and r<=qr){
        seg[id]=max(seg[id],v);
        tag[id]=max(tag[id],v);
        return;
    }
    int mm=l+r>>1;
    push(id);
    modify(l,mm,id*2,ql,qr,v);
    modify(mm+1,r,id*2+1,ql,qr,v);
    seg[id]=min(seg[id*2],seg[id*2+1]);
}
int query(int l,int r,int id,int ql,int qr){
    if(qr<l or r<ql)return 8e18;
    if(ql<=l and r<=qr){
        return seg[id];
    }
    int mm=l+r>>1;
    push(id);
    return min(query(l,mm,id*2,ql,qr),query(mm+1,r,id*2+1,ql,qr));
}
vector<pii>l[mxn],r[mxn];
signed main(){
    setio();
    ios::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    int n,m,q;
    cin>>n>>m>>q;
    vector<pii>cur,qq;
    for(int i=0;i<m;i++){
        int ll,rr;
        cin>>ll>>rr;
        cur.pb({ll,rr});
        r[rr].pb({i,0});
    }
    for(int i=0;i<q;i++){
        int ll,rr;
        cin>>ll>>rr;
        qq.pb({ll,rr});
        r[rr].pb({i,1});
    }
    vector<bool>ans(q);
    for(int i=1;i<mxn;i++){
        for(auto [j,ty]:r[i]){
            if(ty==0){
                modify(1,n,1,cur[j].F,cur[j].S,cur[j].F);
            }
            else{
                if(query(1,n,1,qq[j].F,qq[j].S)>=qq[j].F)ans[j]=1;
                else ans[j]=0;
            }
        }
    }
    for(auto i:ans){
        if(i)cout<<"YES\n";
        else cout<<"NO\n";
    }
}
 /*
 input:
 
 */















 

Compilation message (stderr)

curtains.cpp: In function 'void modify(long long int, long long int, long long int, long long int, long long int, long long int)':
curtains.cpp:73:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   73 |     int mm=l+r>>1;
      |            ~^~
curtains.cpp: In function 'long long int query(long long int, long long int, long long int, long long int, long long int)':
curtains.cpp:84:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   84 |     int mm=l+r>>1;
      |            ~^~
curtains.cpp: In function 'int main()':
curtains.cpp:110:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  110 |         for(auto [j,ty]:r[i]){
      |                  ^
curtains.cpp: In function 'void setIO(std::string)':
curtains.cpp:42:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
curtains.cpp:43:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 3 / 3
• Subtask 2: 6 / 6
• Subtask 3: 15 / 15
• Subtask 4: 20 / 20
• Subtask 5: 36 / 36
• Subtask 6: 20 / 20