Submission #872318

#	Time	Username	Problem	Language	Result	Execution time	Memory
872318		hmuhmuhmu	Ruka (COI15_ruka)	C++14	100 / 100	173 ms	25420 KiB

ruka

#include <bits/stdc++.h>
#define f first
#define s second
#define pb push_back
#define mp make_pair
#define ll long long
#define ldb long double
#define db double
#define fin(x) freopen(x,"r",stdin)
#define fout(x) freopen(x,"w",stdout)
#define fo(i,l,r) for(int i=(l);i<=(r);i++)
#define foi(i,l,r) for(int i=(l);i>=(r);i--)
#define el cout<<'\n';
#define cel cerr<<'\n';
#define all(x) x.begin(),x.end()
#define ii pair<int,int>
#define iii pair<int,ii>
#define gb(x,i) (((x)>>(i))&1)
#define mask(i) (1LL<<(i))
using namespace std;
const int N=3e5+5;
const int bl=60;
const ll base=1e9+7;
const ll inf=1e9;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
ll Rand(ll l,ll r)
{
    return l+(1ll*rng()*rng()%(r-l+1)+(r-l+1))%(r-l+1);
}
template<class X,class Y>bool maximize(X &a,Y b)
{
    if(a<b) return a=b,true;
    return false;
}
template<class X,class Y>bool minimize(X &a, Y b)
{
    if(a>b) return a=b,true;
    return false;
}
void add(auto &a,auto b)
{
    a+=b;
    if(a>=base) a-=base;
    if(a<0) a+=base;
}
int n,ans[N],q;
vector<ii>cc;
vector<ii>num;
vector<int>more;
struct query
{
    char ch;
    int x,y;
};
vector<query>eg;
struct node
{
    node *ch[2];
    int cnt;
    node()
    {
        ch[0]=ch[1]=NULL;
        cnt=0;
    }
};
struct trie
{
    node *root=new node();
    void add(int x,int d)
    {
        x+=1e9;
        node *tmp=root;
        foi(i,30,0)
        {
            int c=gb(x,i);
            if(tmp->ch[c]==NULL) tmp->ch[c]=new node();
            tmp=tmp->ch[c],tmp->cnt+=d;
        }
    }
    int get(int x)
    {
        x+=1e9;
        int kq=0;
        node *tmp=root;
        foi(i,30,0)
        {
            int c=gb(x,i);
            if(c==1)
            {
                if(tmp->ch[0]!=NULL) kq+=tmp->ch[0]->cnt;
                if(tmp->ch[1]==NULL) return kq;
                tmp=tmp->ch[1];
            }
            else
            {
                if(tmp->ch[0]==NULL) return kq;
                tmp=tmp->ch[0];
            }
        }
        return kq;
    }
    void reset()
    {
        root=new node();
    }
}tl,tr;
void add(int l,int r,int c)
{
    if(l>r) swap(l,r);
    tl.add(l,c),tr.add(r,c);
}
void calc()
{
    int nx=1;
    more.clear(),num.clear();
    tl.reset(),tr.reset();
    for(auto [x,y]:cc) num.pb({nx,nx+x}),nx+=x,more.pb(x);
    for(auto [l,r]:num) add(l,r,1);
    int now=0,change=0,pos=0;
    fo(i,0,q-1)
    {
        auto [ch,x,y]=eg[i];
        if(ch=='C')
        {
            int d=x-more[pos];
            int l=num[pos].f,r=num[pos].s;
            add(l,r,-1);
            more[pos]=x,num[pos].f-=d;
            l=num[pos].f,r=num[pos].s;
            add(l,r,1),change+=d;
        }
        else if(ch=='Q') ans[i]+=now+tl.get(-change)-tr.get(-change);
        else if(ch=='F')
        {
            if(pos==n-1) continue;
            auto &[l,r]=num[pos];
            add(l,r,-1);
            l+=change,r+=change;
            now+=((l<0 and r>0) or (l>0 and r<0)),pos++;
        }
        else if(ch=='B')
        {
            if(!pos) continue;
            pos--;
            auto &[l,r]=num[pos];
            if((l<0 and r>0) or (l>0 and r<0)) now--;
            l-=change,r-=change,add(l,r,1);
        }
    }
}
int main()
{
    #define task "o"
    if(fopen(task".inp","r"))
    {
        fin(task".inp");
        //fout(task".out");
    }
    srand(time(NULL));
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    cin>>n,cc.resize(n);
    for(auto &[x,y]:cc) cin>>x>>y;
    cin>>q;
    fo(i,1,q)
    {
        char ch;
        cin>>ch;
        int x=-1,y=-1;
        if(ch=='C') cin>>x>>y;
        eg.pb({ch,x,y});
    }
    calc();
    for(auto &[x,y]:cc) swap(x,y);
    for(auto &[ch,x,y]:eg) swap(x,y);
    calc();
    fo(i,0,q-1) if(eg[i].ch=='Q') cout<<ans[i],el
}

Compilation message (stderr)

ruka.cpp:40:10: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   40 | void add(auto &a,auto b)
      |          ^~~~
ruka.cpp:40:18: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   40 | void add(auto &a,auto b)
      |                  ^~~~
ruka.cpp: In function 'void calc()':
ruka.cpp:117:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  117 |     for(auto [x,y]:cc) num.pb({nx,nx+x}),nx+=x,more.pb(x);
      |              ^
ruka.cpp:118:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  118 |     for(auto [l,r]:num) add(l,r,1);
      |              ^
ruka.cpp:122:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  122 |         auto [ch,x,y]=eg[i];
      |              ^
ruka.cpp:136:19: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  136 |             auto &[l,r]=num[pos];
      |                   ^
ruka.cpp:145:19: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  145 |             auto &[l,r]=num[pos];
      |                   ^
ruka.cpp: In function 'int main()':
ruka.cpp:162:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  162 |     for(auto &[x,y]:cc) cin>>x>>y;
      |               ^
ruka.cpp:173:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  173 |     for(auto &[x,y]:cc) swap(x,y);
      |               ^
ruka.cpp:174:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  174 |     for(auto &[ch,x,y]:eg) swap(x,y);
      |               ^
ruka.cpp:9:23: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 | #define fin(x) freopen(x,"r",stdin)
      |                ~~~~~~~^~~~~~~~~~~~~
ruka.cpp:156:9: note: in expansion of macro 'fin'
  156 |         fin(task".inp");
      |         ^~~

• Subtask 1: 9 / 9
• Subtask 2: 35 / 35
• Subtask 3: 56 / 56