Submission #973087

#	Time	Username	Problem	Language	Result	Execution time	Memory
973087		Unforgettablepl	Bridges (APIO19_bridges)	C++17	16 / 100	210 ms	4176 KiB

bridges

#include <bits/stdc++.h>
using namespace std;

#define int long long
#define f first
#define s second

int tree[131072];

int get(int l,int r){
    int ans = INT32_MAX;
    l+=65536;r+=65536;
    while(l<=r){
        if(l&1)ans=min(ans,tree[l++]);
        if(r%2==0)ans = min(ans,tree[r--]);
        l/=2;r/=2;
    }
    return ans;
}

void update(int k,int x){
    k+=65536;
    tree[k] = x;
    k/=2;
    while(k){
        tree[k] = min(tree[2*k],tree[2*k+1]);
        k/=2;
    }
}

int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int n,m;
    cin >> n >> m;
    for(int i=1;i<=m;i++){
        int c;cin>>c>>c>>c;
        update(i,c);
    }
    int q;
    cin >> q;
    for(int i=1;i<=q;i++){
        int type,a,b;cin>>type>>a>>b;
        if(type==1){
            update(a,b);
        } else {
            int r = a-1;
            for(int jump=32768;jump;jump/=2){
                if(r+jump>=n)continue;
                if(get(a,r+jump)>=b)r+=jump;
            }
            int l = a;
            for(int jump=32768;jump;jump/=2){
                if(l-jump<1)continue;
                if(get(l-jump,a-1)>=b)l-=jump;
            }
            cout << r-l+2 << '\n';
        }
    }
}

• Subtask 1: 0 / 13
• Subtask 2: 16 / 16
• Subtask 3: 0 / 17
• Subtask 4: 0 / 14
• Subtask 5: 0 / 13
• Subtask 6: 0 / 27