Submission #1022188

#	Time	Username	Problem	Language	Result	Execution time	Memory
1022188		dosts	Examination (JOI19_examination)	C++17	0 / 100	482 ms	1048576 KiB

examination

//Dost SEFEROĞLU
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define pii pair<int,int>
#define ff first
#define ss second
#define sp << " " << 
#define vi vector<int>
#define all(xx) xx.begin(),xx.end()
#define ps(xxx) cout << (xxx) << endl;
const int N = 3e5+1,inf = 2e18;

struct Query {
    int id,x,y,z;
};


vi v;


int idx(int x) {
    return upper_bound(all(v),x) - v.begin();
}

struct BIT {
    int n,m;
    vector<vi> bit;

    BIT(int nn,int mm) {
        n = nn,
        m = mm;
        bit.assign(n+1,vi(m+1,0));
    }

    void put(int x,int y,int v) {
        for (int i=x;i<=n;i+=i&-i) {
            for (int j=y;j<=n;j+=j&-j) {
                bit[i][j]+=v;
            }
        }
    } 
    int get(int x,int y) {
        int ans = 0;
        for (int i=x;i>0;i-=i&-i) {
            for (int j=y;j>0;j-=j&-j) {
                ans+=bit[i][j];
            }
        }
        return ans;
    }
};

void solve() { 
    int n,q;
    cin >> n >> q;
    vi a(n+1),b(n+1);
    for (int i=1;i<=n;i++) cin >> a[i] >> b[i];
    vi inds(n+1);
    iota(inds.begin(),inds.end(),0);
    sort(inds.begin()+1,inds.end(),[&](int x,int y) {
        return a[x]+b[x] < a[y]+b[y];
    });
    vector<Query> queries(q);
    vi ans(q);
    for (int i=0;i<q;i++) {
        cin >> queries[i].x >> queries[i].y >> queries[i].z;
        queries[i].id = i;
    }
    for (int i=1;i<=n;i++) v.push_back(-a[i]),v.push_back(-b[i]);
    for (int i=1;i<=q;i++) v.push_back(-queries[i].x),v.push_back(-queries[i].y);
    sort(all(v));
    v.erase(unique(all(v)),v.end());
    sort(queries.begin(), queries.end(),[&](const Query& x,const Query& y) {
        return x.z > y.z;
    });
    int sz = v.size();
    BIT ft(sz,sz);
    int ptr = n+1;
    for (auto Q : queries) {
        int X = Q.x, Y = Q.y, Z = Q.z,ID = Q.id;
        while (ptr > 1 && a[inds[ptr-1]]+b[inds[ptr-1]] >= Z) {
            --ptr;
            ft.put(idx(-a[inds[ptr]]),idx(-b[inds[ptr]]),1);
        }
        ans[Q.id] = ft.get(idx(-X),idx(-Y));
    }
    for (int i=0;i<q;i++) cout << ans[i] << '\n';
}      
 
                
                            
signed main() { 
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    #ifdef Dodi
        freopen("in.txt","r",stdin);
        freopen("out.txt","w",stdout);
    #endif
    int t = 1;
    //cin >> t; 
    while (t --> 0) solve();
}

Compilation message (stderr)

examination.cpp: In function 'void solve()':
examination.cpp:81:39: warning: unused variable 'ID' [-Wunused-variable]
   81 |         int X = Q.x, Y = Q.y, Z = Q.z,ID = Q.id;
      |                                       ^~

• Subtask 1: 0 / 2
• Subtask 2: 0 / 20
• Subtask 3: 0 / 21
• Subtask 4: 0 / 57