Submission #1020247

#	Time	Username	Problem	Language	Result	Execution time	Memory
1020247		YassineBenYounes	Fish 3 (JOI24_fish3)	C++17	0 / 100	276 ms	48444 KiB

Main

#include<bits/stdc++.h>
 
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef double db;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define pbds tree<int, null_type, less<int>,rb_tree_tag, tree_order_statistics_node_update>
using namespace __gnu_pbds;
ll gcd(ll a , ll b) {return b ? gcd(b , a % b) : a ;} // greatest common divisor (PGCD)
ll lcm(ll a , ll b) {return (a * b) / gcd(a , b);} // least common multiple (PPCM)
int dx[8] = {1, 0, 0, -1, 1, 1, -1, -1};
int dy[8] = {0, 1, -1, 0, 1, -1, -1, 1};
#define endl "\n"
#define ss second
#define ff first
#define all(x) (x).begin() , (x).end()
#define pb push_back
#define vi vector<int>
#define vii vector<pair<int,int>>
#define vl vector<ll>
#define vll vector<pair<ll,ll>>
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pdd  pair<double,double>
#define vdd  vector<pdd>
#define speed ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
using namespace std;
////////////////////Only Clear Code//////////////////////////
 
void usaco_problem(){
    freopen("milkvisits.in", "r", stdin);
    freopen("milkvisits.out", "w", stdout);
}
 
void init(){
    #ifndef ONLINE_JUDGE
 
freopen("input.txt", "r", stdin);
 
freopen("output.txt", "w", stdout);
 
#endif // ONLINE_JUDGE
}
const int mx = (3e5+2)*4;
const int LOG = 25;
const int inf = 1e9;
const ll mod = 998244353;

#define int ll

ll arr[mx];

ll segtree[mx], fst[mx];
ll lft[mx], rgt[mx];

void combine(int c, int a, int b){
    if(arr[rgt[a]] <= fst[b]){
        segtree[c] = segtree[a] + segtree[b];
        fst[c] = fst[a];
        return;
    }
    ll steps = arr[rgt[a]] - fst[b];
    segtree[c] = segtree[a] + segtree[b] + steps * (rgt[a] - lft[a] + 1);
    fst[c] = fst[a] - steps;
}

void build(int node, int l, int r){
    lft[node] = l;
    rgt[node] = r;
    if(l == r){
        segtree[node] = 0;
        fst[node] = arr[l];
        return;
    }
    int md = (l+r)/2;
    build(node*2, l, md);
    build(node*2+1, md+1, r);
    combine(node, node*2, node*2+1);
}

int _count(int n){
    int c = 0;
    while(n > 0){
        c += n&1;
        n /= 2;
    }
    return c;
}

pll solve(int a, pll pa, int b, pll pb, int qlow, int qhigh){
    ll x = arr[rgt[a]];
    ll y = pb.ss;
    if(x <= y){
        return {pa.ff+pb.ff, pa.ss};
    }
    ll steps = x - y;
    ll ans1 = pa.ff + pb.ff + steps * (rgt[a] - max(lft[a], qlow) + 1);
    return {ans1 ,pa.ss - steps};
}

pll query(int node, int qlow, int qhigh, int l, int r){
    if(r < qlow || l > qhigh){
        return {-1, 0};
    }
    if(l >= qlow && r <= qhigh){
        return {segtree[node], fst[node]};
    }
    int md = (l+r)/2;
    pll a = query(node*2, qlow, qhigh, l, md);
    pll b = query(node*2+1, qlow, qhigh, md+1, r);
    if(a.ff == -1)return b;
    if(b.ff == -1)return a;
    return solve(node*2, a, node*2+1, b, qlow, qhigh);
}

int32_t main(){
    speed;
    ll d;
    int n;cin >> n >> d;
    for(int i = 0; i < n;i++){
        cin >> arr[i];
    }
    while(_count(n) != 1){
        n++;
    }
    build(1, 0, n-1);
    /*for(int i = 1; i < 2*n;i++){
        cout << i << " " << segtree[i] << " : " << fst[i] << endl; 
    }*/
    int q;cin >> q;
    while(q--){
        int l, r;cin >> l >> r;l--;r--;
        /*ll done = 0;
        bool ok = 1;
        ll ans = 0;
        ll nxt = arr[r];
        for(int i = r-1;i >= l;i--){
            if(arr[i] <= nxt){
                nxt = arr[i];
                continue;
            }
            ll diff = arr[i] - nxt;
            ll steps = ceil((ld)diff / d);
            ll nw = arr[i] - d*steps;
            if(nw < 0){ok = 0;break;}
            ans += steps;
            nxt = nw;
        }
        cout << (ok ? ans : -1) << endl;*/
       // cout << segtree[4] << endl;
        cout << query(1, l, r, 0, n-1).ff << endl;
    }
}
 
/*
    NEVER GIVE UP!
    DOING SMTHNG IS BETTER THAN DOING NTHNG!!!
    Your Guide when stuck:
    - Continue keyword only after reading the whole input
    - Don't use memset with testcases
    - Check for corner cases(n=1, n=0)
    - Check where you declare n(Be careful of declaring it globally and in main)
*/

Compilation message (stderr)

Main.cpp: In function 'void usaco_problem()':
Main.cpp:33:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |     freopen("milkvisits.in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:34:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |     freopen("milkvisits.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp: In function 'void init()':
Main.cpp:40:8: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 | freopen("input.txt", "r", stdin);
      | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:42:8: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 | freopen("output.txt", "w", stdout);
      | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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