Submission #1021230

#	Time	Username	Problem	Language	Result	Execution time	Memory
1021230		Baytoro	Fish 3 (JOI24_fish3)	C++17	100 / 100	449 ms	60500 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define fr first
#define sc second
#define int ll
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
const int N=3e5+5,INF=1e18;

int t[4*N],lazy[4*N];
void push(int x, int l, int r) {
    if( lazy[x] == INF ) return;
    t[x] = lazy[x] * (r - l + 1);
    if( l < r ) {
        lazy[2 * x] = lazy[x];
        lazy[2 * x + 1] = lazy[x];
    }
    lazy[x] = INF;
}
void update(int lx, int rx, int v, int x, int l, int r) {
    push( x, l, r );
    if( lx>r || rx<l ) return;
    if( lx <= l && r <= rx) {
        lazy[x]=v;
        push(x, l, r);
        return;
    }
    int md = ( l + r ) / 2;
    update( lx, rx, v, 2 * x, l, md );
    update( lx, rx, v, 2 * x + 1, md + 1, r );
    t[x] = t[2 * x] + t[2 * x + 1];
}

int query( int lx, int rx, int x, int l, int r ) {
    push( x, l, r );
    if( lx > r || rx < l ) return 0;
    if( lx <= l && r <= rx ) return t[x];
    int md = ( l + r ) / 2;
    return query( lx, rx, 2 * x, l, md ) + query( lx, rx, 2 * x + 1, md + 1, r );
}
vector<pair<int,int>> Q[N];
int a[N],need[N],pref[N];
int s[N],pr[N],v[N];
void solve() {
    int n,d;cin>>n>>d;
    for(int i=1;i<=n;i++) cin>>a[i];
    for(int i=1;i<=n;i++) {
        v[i] = a[i]/d;
        pr[i] = pr[i-1]+v[i];
    }
    for( int i = 2; i <= n; i++ ) {
        need[i]=need[i-1];
        if( (a[i-1]%d) > (a[i]%d) ) need[i]++;
        s[i] = need[i]+s[i-1];
    }
    int q;cin>>q;
    for(int i=0;i<q;i++) {
        int l,r;cin>>l>>r;
        Q[r].pb({l,i});
    }
    for(int i=0;i<4*N;i++) lazy[i]=INF;
    stack<pair<int,int>> st;
    vector<int> ans(q);
    for(int i=1;i<=n;i++) {
        int id = i;
        while(!st.empty() && st.top().fr>v[i]-need[i]) {
            id = st.top().sc;
            st.pop();
        }
        st.push({v[i] - need[i], id});
        update(id, i, v[i] - need[i], 1, 1, n);
        for( auto it : Q[i] ) {
            ans[it.sc] = ( pr[i] - pr[it.fr - 1] );
            ans[it.sc] -= query( it.fr, i, 1, 1 , n);
            ans[it.sc] -= ( s[i] - s[it.fr - 1] );
            if( query (it.fr, it.fr, 1,1,n) + need[it.fr] < 0) ans[it.sc] = -1;
        }
    }
    for(int i=0;i<q;i++) cout<<ans[i]<<'\n';
}
signed main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    int t=1;//cin>>t;
    while(t--){
        solve();
    }
}
//#endif

• Subtask 1: 9 / 9
• Subtask 2: 7 / 7
• Subtask 3: 28 / 28
• Subtask 4: 20 / 20
• Subtask 5: 36 / 36