Submission #896863

#	Time	Username	Problem	Language	Result	Execution time	Memory
896863		bLIC	Examination (JOI19_examination)	C++17	100 / 100	210 ms	30548 KiB

examination

/**
 *  Author: Anil Byar
**/

#include <bits/stdc++.h>
// #include <ext/pb_ds/assoc_container.hpp>
// #include <ext/pb_ds/tree_policy.hpp>

// using namespace __gnu_pbds;
using namespace std;

// template<class T>
// using ordered_set = tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;



#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define sz(x) (int)(x).size()
#define uniq(v) v.erase(unique(all(v)), v.end())
#define ft first
#define sd second
#define pb push_back
#define eb emplace_back

// Source: https://codeforces.com/blog/entry/68809
// { start
void __print(int x) {cerr << x;}
void __print(long x) {cerr << x;}
void __print(long long x) {cerr << x;}
void __print(unsigned x) {cerr << x;}
void __print(unsigned long x) {cerr << x;}
void __print(unsigned long long 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...);}
#ifndef ONLINE_JUDGE
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
#define debug(x...)
#endif
// } end


typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<pii> vii;
typedef vector<ll> vl;
typedef vector<pll> vll;
typedef vector<vi> vvi;
typedef vector<vii> vvii;
typedef vector<vl> vvl;

#define dbg if(0)

const ll MOD = 1e9+7;
const ll MOD9 = 998244353;
const ll INFLL = 1e18+5;
const int INF = 1e9;

void printbit(int x, int len) {string s="\n";while(len--){s=((x%2)?'1':'0')+s;x/=2;} cout<<s;}
ll power(ll x, ll y, ll mod){if (y==0) return 1;ll ret = power(x, y/2, mod);ret *= ret;ret%=mod;if (y&1) ret *= x;return ret%mod;}
ll modinv(ll x, ll mod = MOD) {return power(x, mod-2, mod);}

template<class T> bool chmin(T& a, T b){return (a>b?a=b,1:0);}
template<class T> bool chmax(T& a, T b){return (a<b?a=b,1:0);}
template<class T>
istream& operator>>(istream&in, vector<T>&v){
    for (T& x:v) in>>x;
    return in;
}
template<class T>
ostream& operator<<(ostream&out, vector<T>&v){
    for (T& x:v) out<<x<<' ';
    cout<<'\n';
    return out;
}


// Source: https://codeforces.com/blog/entry/18051
template <class T> struct SegTree{
    int n; T ID;
    std::vector<T> tree;
    T oper(T a, T b){return a+b;} // update this operation function according to need
    SegTree(int _n, T id){
        n = 1;ID = id;
        while(n<_n) n<<=1;
        tree.resize(2*n, ID);
    }
    void add(int i, T val){tree[i+n] = val;}
    void build(){
        for (int i = n-1;i>0;--i) tree[i] = oper(tree[i<<1], tree[i<<1|1]);
    }
    void update(int ind, T value){
        for (tree[ind+=n]+=value;ind>1;ind>>=1) tree[ind>>1] = (ind&1)?oper(tree[ind^1], tree[ind]):oper(tree[ind], tree[ind^1]);
    }
    T query(int l, int r){// indexing is from 0 to n-1, gives answer to [l, r)
        T left = ID, right = ID; // left and right for non associative operation
        for (l+=n, r+=n;l<r;l>>=1, r>>=1){
            if (l&1) left = oper(left, tree[l++]);
            if (r&1) right = oper(tree[--r], right);
        }
        return oper(left, right);
    }
};


// use ?: with brackets (?:)
// check for overflow
// think about dp
// Read the statement carefully



void solve(){
    int n, q;cin>>n>>q;
    vii a(n);
    vi tmp;
    for (int i = 0;i<n;i++){
        cin>>a[i].first>>a[i].second;
        tmp.push_back(a[i].first);
        tmp.push_back(a[i].second);
        tmp.push_back(a[i].first+a[i].second);
    }
    int ans[q]{};
    // q1 >=x, >=y, q2 x+y>=z, 
    vector<array<int, 3>> q1, queries(q);
    vector<array<int, 4>> q2;// x + y>=z , x<=A<=boundary
    for (int i =0;i<q;i++){
        int x, y, z;
        cin>>x>>y>>z;
        int boundary = z - y;
        q1.push_back({max(x, boundary), y, i});
        q2.push_back({x, boundary, z, i});
        tmp.push_back(x);
        tmp.push_back(y);
        tmp.push_back(z);
    }

    sort(all(tmp));
    uniq(tmp);

    auto getid = [&](int x){
        return lower_bound(all(tmp), x) - tmp.begin();
    };
    sort(all(a), [](pii x, pii y){
        return x.second>y.second;
    });
    sort(q1.begin(), q1.end(), [](array<int, 3> x, array<int, 3> y){
        return x[1]>y[1];
    });
    int m = sz(tmp);
    SegTree<int> seg(m, 0);
    int ind = 0;
    for (auto [x, y, id]:q1){
        while(ind<n && a[ind].second>=y){
            seg.update(getid(a[ind].first), 1);
            ind++;
        }
        ans[id] = seg.query(getid(x), m);
    }

    sort(all(a), [](pii x, pii y){
        return x.first+x.second>y.first + y.second;
    });
    sort(all(q2), [](array<int, 4>& x, array<int, 4>& y){
        return x[2]>y[2];
    });
    seg = SegTree<int>(m, 0);
    ind = 0;
    for (auto [x1, x2, y, id]:q2){
        while(ind<n && a[ind].second+a[ind].first>=y){
            seg.update(getid(a[ind].first), 1);
            ind++;
        }
        ans[id] += seg.query(getid(x1), getid(x2));
    }
    for (int i = 0;i<q;i++) cout<<ans[i]<<'\n';
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);


#define ONLINE_JUDGE
#ifndef ONLINE_JUDGE
    freopen("input.in", "r", stdin);
    freopen("output.out", "w", stdout);
    freopen("debug.dbg", "w", stderr);
    int tt = clock();
#endif

    int t=1, i = 1;
    // cin>>t;
    while(t--){
        // cout<<"Case #"<<i++<<": ";
        solve();
        cout<<'\n';
    }
#ifndef ONLINE_JUDGE
    cerr << "TIME = " << (float)(clock() - tt)/CLOCKS_PER_SEC << endl;
    tt = clock();
#endif
}

Compilation message (stderr)

examination.cpp: In function 'int main()':
examination.cpp:209:14: warning: unused variable 'i' [-Wunused-variable]
  209 |     int t=1, i = 1;
      |              ^

• Subtask 1: 2 / 2
• Subtask 2: 20 / 20
• Subtask 3: 21 / 21
• Subtask 4: 57 / 57