Submission #520633

#	Time	Username	Problem	Language	Result	Execution time	Memory
520633		sktlzz	Trampoline (info1cup20_trampoline)	C++17	0 / 100	216 ms	38536 KiB

trampoline

#include <bits/stdc++.h>
using namespace std;
#define deb(x) cout << #x<<' '<< x <<'\n'
#define ios ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define fo(i,n) for(i=0;i<n;i++)
#define Fo(i,k,n) for(i=k;i<n;i++)
#define ro(i,n) for(i=n;i<=0;i--)
#define Ro(i,k,n) for(i=k;i<n;i--)
#define ll long long
#define pll pair<ll,ll>
#define tll tuple<ll, ll, ll>
#define vl vector<ll>
#define vpll vector<pll>
#define pb push_back
#define MEMINF 0x3f // ll 456e16, int 11e8
#define MEMINFB 0x7f // ll 919e16, int 21e8
#define MEMINFN 0x80 // ll -810e16, int -19e8
#define INF LLONG_MAX
#define MM <<" "<<
#define endl "\n"

int nx[200005][20];

int main(){
    ios;
    ll i,j,k,n,m,r,c,q;
    ll x1,y1,x2,y2;
    int ind,x,dx;
    cin >> r >> c >> n;
    vpll v(n);
    fo(i,n) { cin >> j >> k; v[i]={j,k};}
    sort(v.begin(),v.end());
    fo(i,n){
        pll find = {v[i].first+1,v[i].second};
        auto it = lower_bound(v.begin(),v.end(),find);
        if(it == v.end() || (*it).first > find.first) nx[i][0] = -1;
        else nx[i][0] = (it - v.begin());
    }
    Fo(j,1,21) fo(i,n) nx[i][j] = nx[nx[i][j-1]][j-1];
    cin >> q;
    while (q--){
        bool ans = true;
        cin >> x1 >> y1 >> x2 >> y2;
        if (x1 == x2) ans = (y1 <= y2); 
        else if (x1 > x2) ans = false;
        else {
            dx = x2-x1-1;
            pll cur = {x1,y1};
            auto it = lower_bound(v.begin(),v.end(),cur);
            if (it == v.end() || (*it).first > x1 ) ans = false;
            else {
                ind = (it-v.begin());
                x = 0;
                while (dx){
                    if (dx&1) ind = nx[ind][x];
                    if (ind == -1) {ans = false; break;}
                    dx >>= 1;
                    x++;
                }
                if (ans) ans = (v[ind].second <=y2);
            }
        }
        if (ans) cout <<"Yes"<<endl;
        else cout << "No"<<endl;
    }
}

Compilation message (stderr)

trampoline.cpp: In function 'int main()':
trampoline.cpp:26:16: warning: unused variable 'm' [-Wunused-variable]
   26 |     ll i,j,k,n,m,r,c,q;
      |                ^

• Subtask 1: 0 / 23
• Subtask 2: 0 / 20
• Subtask 3: 0 / 11
• Subtask 4: 0 / 19
• Subtask 5: 0 / 27