제출 #942821

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
942821		yeediot	Examination (JOI19_examination)	C++14	0 / 100	184 ms	21780 KiB

examination

#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);
}
struct node{
    int x,y,z,tf;
    bool operator <(const node b)const{
        if(z!=b.z)return z>b.z;
        //else if(x!=b.x)return x<b.x;
        //return y<b.y;
        return z>b.z;
    }
};
const int mxn=2e5+5;
vector<node>vec;
node upd[mxn];
int bit[mxn];
int ans[mxn];
void modify(int p,int v){
    p++;
    for(;p<mxn;p+=p&-p){
        bit[p]+=v;
    }
}
int query(int p){
    p++;
    int res=0;
    for(;p;p-=p&-p){
        res+=bit[p];
    }
    return res;
}
void cdq(int l,int r){
    if(l>=r)return;
    int mm=l+r>>1;
    cdq(l,mm);
    cdq(mm+1,r);
    int L=l,R=mm+1;
    vector<int>undo;
    int p=l;
    while(L<=mm or R<=r){
        if(R>r or (L<=mm and vec[L].x>=vec[R].x)){
            if(!vec[L].tf){
                modify(vec[L].y,1);
                undo.pb(vec[L].y);
            }
            else{
                ans[vec[L].tf-1]+=query(mxn-2)-query(vec[L].y-1);
            }
            upd[p++]=vec[L];
            L++;
        }
        else{
            if(vec[R].tf){
                //debug(vec[R].tf,mxn-2,vec[R].y-1,query(mxn-1)-query(vec[R].y-1));
                ans[vec[R].tf-1]+=query(mxn-2)-query(vec[R].y-1);
            }
            upd[p++]=vec[R];
            R++;
        }
    }
    for(auto x:undo)modify(x,-1);
    for(int i=l;i<=r;i++){
        vec[i]=upd[i];
    }
}
vector<int>temp;
void lisanhua(node& a){
    a.y=lower_bound(all(temp),a.y)-temp.begin();
}
signed main(){
    setio();
    ios::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    int n,q;
    cin>>n>>q;
    for(int i=0;i<n;i++){
        int a,b;
        cin>>a>>b;
        int c=a+b;
        vec.pb({a,b,c});
        temp.pb(b);
    }
    for(int i=0;i<q;i++){
        int a,b,c;
        cin>>a>>b>>c;
        vec.pb({a,b,c});
        temp.pb(b);
        vec.back().tf=i+1;
    }
    sort(all(vec));
    sort(all(temp));
    temp.resize(unique(all(temp))-temp.begin());
    for(int i=0;i<n+q;i++){
        lisanhua(vec[i]);
    }
    cdq(0,n+q);
    for(int i=0;i<q;i++){
        cout<<ans[i]<<'\n';
    }
}
 /*
 input:
 
 */















 

컴파일 시 표준 에러 (stderr) 메시지

examination.cpp: In function 'void cdq(long long int, long long int)':
examination.cpp:84:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   84 |     int mm=l+r>>1;
      |            ~^~
examination.cpp: In function 'void setIO(std::string)':
examination.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);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
examination.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);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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• Subtask 2: 0 / 20
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• Subtask 4: 0 / 57