Submission #202270

#	Time	Username	Problem	Language	Result	Execution time	Memory
202270		Segtree	Selling RNA Strands (JOI16_selling_rna)	C++14	100 / 100	964 ms	56092 KiB

selling_rna

#include<iostream>
#include<algorithm>
#include<vector>
#include<queue>
#include<set>
#include<unordered_set>
#include<unordered_map>
using namespace std;
typedef long long ll;
#define chmax(a,b) a=max(a,b)
#define chmin(a,b) a=min(a,b)
#define all(x) x.begin(),x.end()
#define rep(i,n) for(int i=0;i<n;i++)
#define mod 1000000007
#define mad(a,b) a=(a+b)%mod
#define N 100010
string s[N],p[N],q[N];
ll a[N],b[N],c[N],d[N];
ll ys[N];
vector<ll> dat[2*N];
ll ret(ll c,ll d,ll k){
    return lower_bound(all(dat[k]),d)-lower_bound(all(dat[k]),c);
}
int main(){
    int n,m;
    cin>>n>>m;
    vector<pair<string,int> >v;
    rep(i,n){
	cin>>s[i];
    }
    rep(i,m)cin>>p[i]>>q[i];
    sort(s,s+n);
    
    rep(i,m){
	a[i]=lower_bound(s,s+n,p[i])-s;
	p[i][p[i].size()-1]++;
	b[i]=lower_bound(s,s+n,p[i])-s;
    }
    rep(i,n){
	rep(j,s[i].size()/2)swap(s[i][j],s[i][s[i].size()-1-j]);
	v.push_back(make_pair(s[i],i));
    }
    sort(v.begin(),v.end());
    rep(i,n)ys[v[i].second]=i;
    rep(i,n)s[i]=v[i].first;
    rep(i,m){
	rep(j,q[i].size()/2)swap(q[i][j],q[i][q[i].size()-1-j]);
	c[i]=lower_bound(s,s+n,q[i])-s;
	q[i][q[i].size()-1]++;
	d[i]=lower_bound(s,s+n,q[i])-s;
    }
    rep(i,n){
	for(ll x=i+N;x;x>>=1){
	    dat[x].push_back(ys[i]);
	}
    }
    rep(i,2*N)sort(dat[i].begin(),dat[i].end());
    rep(i,m){
	ll ans=0;
	ll l=a[i]+N,r=b[i]+N;
	for(;l<r;l>>=1,r>>=1){
	    if(l&1)ans+=ret(c[i],d[i],l++);
	    if(r&1)ans+=ret(c[i],d[i],--r);
	}
	cout<<ans<<endl;
    }
}

Compilation message (stderr)

selling_rna.cpp: In function 'int main()':
selling_rna.cpp:13:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define rep(i,n) for(int i=0;i<n;i++)
selling_rna.cpp:40:6:
  rep(j,s[i].size()/2)swap(s[i][j],s[i][s[i].size()-1-j]);
      ~~~~~~~~~~~~~~~           
selling_rna.cpp:40:2: note: in expansion of macro 'rep'
  rep(j,s[i].size()/2)swap(s[i][j],s[i][s[i].size()-1-j]);
  ^~~
selling_rna.cpp:13:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define rep(i,n) for(int i=0;i<n;i++)
selling_rna.cpp:47:6:
  rep(j,q[i].size()/2)swap(q[i][j],q[i][q[i].size()-1-j]);
      ~~~~~~~~~~~~~~~           
selling_rna.cpp:47:2: note: in expansion of macro 'rep'
  rep(j,q[i].size()/2)swap(q[i][j],q[i][q[i].size()-1-j]);
  ^~~

• Subtask 1: 10 / 10
• Subtask 2: 25 / 25
• Subtask 3: 25 / 25
• Subtask 4: 40 / 40