Submission #1088171

#	Time	Username	Problem	Language	Result	Execution time	Memory
1088171		Almonther	Bouquet (EGOI24_bouquet)	C++98	8 / 100	97 ms	22204 KiB

Main

#include <bits/stdc++.h>

#define suiii ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define ll long long
#define co cout<<
//#pragma GCC optimize("O3,Ofast,unroll-loops")
//#pragma GCC target("avx2,sse3,sse4,avx")
using namespace std;
//stuff
const ll N=exp2(ceil(log2(2e5)));
ll tre[4*N]={};
ll sumof(ll l,ll r,ll i,ll lq,ll rq){
    if(l>rq||r<lq) return 0;
    if(l>=lq&&r<=rq) return tre[i];
    ll mid=(l+r)/2;
    return sumof(l,mid,i*2,lq,rq)|sumof(mid+1,r,i*2+1,lq,rq);
}
void solve(){
    ll n;
    cin>>n;
    ll l[n+5],r[n+5],safe[n+5]={};
    set<pair<ll,ll>>s;
    for(ll i=0;i<n;i++){
        cin>>l[i]>>r[i];
        l[i]=min(i,l[i]);
        r[i]=min(n-i-1,r[i]);
        s.insert({l[i]+r[i],i});
    }
    ll ans=0;
    while(s.size()){
        auto [val,idx]=*s.begin();
        s.erase(s.begin());
        if(sumof(0,N-1,1,idx-l[idx],idx+r[idx])==1) continue;
        idx+=N;
        ans++;
        tre[idx]=1;
        idx/=2;
        while(idx){
            tre[idx]=tre[idx*2]|tre[idx*2+1];
            idx/=2;
        }
    }
    co ans;
}
int main()
{
    suiii
    int _=1;
    // cin>>_;
    while(_--) solve();
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'void solve()':
Main.cpp:31:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   31 |         auto [val,idx]=*s.begin();
      |              ^
Main.cpp:21:22: warning: unused variable 'safe' [-Wunused-variable]
   21 |     ll l[n+5],r[n+5],safe[n+5]={};
      |                      ^~~~

• Subtask 1: 8 / 8
• Subtask 2: 0 / 16
• Subtask 3: 0 / 28
• Subtask 4: 0 / 18
• Subtask 5: 0 / 30