Submission #974686

#	Time	Username	Problem	Language	Result	Execution time	Memory
974686		Abito	Bridges (APIO19_bridges)	C++17	16 / 100	607 ms	3920 KiB

bridges

#include <bits/stdc++.h>
#define F first
#define S second
#define pb push_back
#define ppb pop_back
#define ep insert
#define endl '\n'
#define elif else if
#define pow pwr
#define sqrt sqrtt
//#define int long long
#define ll long long
typedef unsigned long long ull;
using namespace std;
const int N=1e5+5;
int n,m,q,w[N],W,seg[4*N+5],idx,val,lx,rx;
int build(int x,int l,int r){
    if (l>r) return INT_MAX;
    if (l==r) return seg[x]=w[l];
    int mid=(l+r)/2;
    return seg[x]=min(build(x*2,l,mid),build(x*2+1,mid+1,r));
}
void edit(int x,int l,int r){
    if (l>r);
    if (l==r){
        seg[x]=val;
        return;
    }
    int mid=(l+r)/2;
    if (idx<=mid) edit(x*2,l,mid);
    else edit(x*2+1,mid+1,r);
    seg[x]=min(seg[x*2],seg[x*2+1]);
}
int query(int x,int l,int r){
    if (l>=lx && r<=rx) return seg[x];
    if (l>rx || r<lx || l>r) return INT_MAX;
    int mid=(l+r)/2;
    return min(query(x*2,l,mid),query(x*2+1,mid+1,r));
}
int32_t main(){
    ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
    cin>>n>>m;
    for (int i=1;i<=m;i++){
        int x,y;
        cin>>x>>y>>w[i];
    }
    build(1,1,n-1);
    cin>>q;
    while (q--){
        int t,x,y;
        cin>>t>>x>>y;
        if (t==1){
            idx=x,val=y;
            edit(1,1,n-1);
            continue;
        }
        int ans=1,l=x,r=n-1,mid,z=x-1;
        lx=x;
        while (l<=r){
            rx=mid=(l+r)/2;
            int c=query(1,1,n-1);
            if (c>=y){
                z=mid;
                l=mid+1;
            }else r=mid-1;
        }ans+=(z-x+1);
        rx=x-1;
        l=1,r=x-1,z=x;
        while (l<=r){
            lx=mid=(l+r)/2;
            int c=query(1,1,n-1);
            if (c>=y){
                z=mid;
                r=mid-1;
            }else l=mid+1;
        }ans+=x-z;
        cout<<ans<<endl;
    }
    return 0;
}

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