Submission #1140129

#	Time	Username	Problem	Language	Result	Execution time	Memory
1140129		ByeWorld	Fish 3 (JOI24_fish3)	C++20	0 / 100	2097 ms	24692 KiB

Main

#include <bits/stdc++.h>
#define int long long
#define ll long long
#define pb push_back
#define fi first
#define se second
#define lf (id<<1)
#define rg ((id<<1)|1)
#define md ((l+r)>>1)
#define ld long double
using namespace std;
typedef pair<int,int> pii;
typedef pair<char,char> pcc;
typedef pair<int,pii> ipii;
typedef pair<pii,pii> ipiii;
const int MAXN = 3e5+50;
const int SQRT = 610;
const int MAXA = 50;
const int MOD = 998244353;
const int LOG = 21;
const int INF = 1e16+100;
const int INF2 = 1e18;
const ld EPS = 1e-12;

int n, d, c[MAXN], ans[MAXN], val[MAXN], su[MAXN];
vector <pii> que[MAXN];

int QUE(int l, int r){
    int tot = su[l]-su[r+1] - (r-l+1)*val[r+1];
    return tot;
}
signed main(){
    // ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    cin>>n>>d;
    for(int i=1; i<=n; i++){
        cin >> c[i];
    }
    for(int i=n-1; i>=1; i--){
        val[i] = val[i+1];
        if(c[i] >= c[i+1]) val[i] += (c[i]-c[i+1]+d-1)/d;
        else val[i] -= (c[i+1]-c[i])/d;
        su[i] = su[i+1] + val[i];
        // cout << i << ' ' << val[i] << ' ' << su[i] << " pp\n";
    }
    int q; cin>>q;
    for(int i=1; i<=q; i++){
        int l, r; cin>>l>>r;
        if(l==r){ ans[i] = 0; continue; }
        que[r].pb({l, i});
    }
    int las = 0;
    for(int i=1; i<=n; i++){
        if(i!=1 && c[i-1] > c[i]) las = i-1;

        for(auto [x, id] : que[i]){
            if(las<x){
                ans[id] = 0; continue;
            }
            // cout << las << "las\n";
            bool can = 1; 
            for(int j=las; j>=x; j--){
                if(c[j] < d*(val[j]-val[las+1])) can = 0;
            }
            if(!can){ 
                ans[id] = -1; continue;
            }
            ans[id] = QUE(x, las);
        }
        // int nw = 0; bool can = 1;
        // for(int j=r; j>=l; j--){
        //     if(c[j] >= c[j+1]) nw += (c[j]-c[j+1]+d-1)/d;
        //     else nw -= (c[j+1]-c[j])/d;
        //     if(nw*d > c[j]) can = 0;
        //     nw = max(0ll, nw);
        //     ans[i] += nw;
        // }
        // if(!can) ans[i] = -1;
        // if((val[l]-val[r+1])*d > c[l]){ ans[i] = -1; continue; }

        // ans[i] = su[l]-su[r+1] - (r-l+1) * val[r+1];
        // cout << su[l]-su[r+1] << " su\n";
    }
    for(int i=1; i<=q;i++) cout << ans[i] << " \n";
}

• Subtask 1: 0 / 9
• Subtask 2: 0 / 7
• Subtask 3: 0 / 28
• Subtask 4: 0 / 20
• Subtask 5: 0 / 36