Submission #1091498

#	Time	Username	Problem	Language	Result	Execution time	Memory
1091498		thangdz2k7	Fish 3 (JOI24_fish3)	C++17	100 / 100	417 ms	54460 KiB

Main

// author : thembululquaUwU
// 3.9.2024

#include <bits/stdc++.h>
#define pb push_back
#define fi first
#define se second
#define endl '\n'

using namespace std;
using ll = long long;
using ii = pair <int, int>;
using vi = vector <int>;

const int N = 3e5 + 5;
const int mod = 1e9 + 7;

void maxl(auto &a, auto b) {a = max(a, b);}
void minl(auto &a, auto b) {a = min(a, b);}

int n, q, lq[N], rq[N], sz[4 * N];
ll d, c[N], rs[N];
vector <int> query[N];

ll sum[4 * N], lz[4 * N];

void build(int s = 1, int l = 1, int r = n){
    sz[s] = r - l + 1, sum[s] = 0, lz[s] = 0;
    if (l == r) return; int mid = l + r >> 1;
    build(s << 1, l, mid); build(s << 1 | 1, mid + 1, r);
}

void add(int s, ll val){
    lz[s] += val; sum[s] += val * sz[s];
}

void down(int s){
    if (lz[s] == 0) return;
    add(s << 1, lz[s]); add(s << 1 | 1, lz[s]); lz[s] = 0;
}

void upd(int u, int v, ll val, int s = 1, int l = 1, int r = n){
    if (u <= l && r <= v){
        add(s, val);
        return;
    }

    int mid = l + r >> 1; down(s);
    if (mid >= u) upd(u, v, val, s << 1, l, mid);
    if (mid + 1 <= v) upd(u, v, val, s << 1 | 1, mid + 1, r);
    sum[s] = sum[s << 1] + sum[s << 1 | 1];
}

ll get(int u, int v, int s = 1, int l = 1, int r = n){
    if (u <= l && r <= v) return sum[s];
    int mid = l + r >> 1; down(s); ll ans = 0;
    if (mid >= u) ans += get(u, v, s << 1, l, mid);
    if (mid + 1 <= v) ans += get(u, v, s << 1 | 1, mid + 1, r);
    return ans;
}

ll up(ll a, ll b){return (a + b - 1) / b;}

struct DSU{
    vi par;

    DSU(int n){
        par.resize(n);
        for (int i = 0; i < n; ++ i) par[i] = i;
    }

    int find(int u){
        if (u == par[u]) return u;
        return par[u] = find(par[u]);
    }

    bool check(int u, int v){
        return find(u) == find(v);
    }

    void joint(int u, int v){
        u = find(u); v = find(v);
        par[u] = v;
    }
};

void solve(){
    cin >> n >> d;
    for (int i = 1; i <= n; ++ i) cin >> c[i];
    cin >> q;
    for (int i = 1; i <= q; ++ i) {
        cin >> lq[i] >> rq[i];
        query[rq[i]].pb(i);
    }

    DSU pqh(n + 1); build();
    for (int i = 1; i <= n; ++ i){
        int u = i;
        while (u > 1){
            int r = u - 1, l = pqh.find(r);
            ll nu = d * get(u, u), nr = d * get(r, r);
            ll cost = up((c[r] - nr) - (c[u] - nu), d);
            if (cost <= 0) break; pqh.joint(u, l); upd(l, r, cost); u = l;
        }
        for (int id : query[i]) {
            if (c[lq[id]] - d * get(lq[id], lq[id]) < 0) rs[id] = -1;
            else rs[id] = get(lq[id], rq[id]);
        }
    }
    for (int i = 1; i <= q; ++ i) cout << rs[i] << endl;
}

int main(){
    if (fopen("code.inp", "r")){
        freopen("code.inp", "r", stdin);
        freopen("code.out", "w", stdout);
    }
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    int t = 1; // cin >> t;
    while (t --) solve();
    return 0;
}

Compilation message (stderr)

Main.cpp:18:11: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   18 | void maxl(auto &a, auto b) {a = max(a, b);}
      |           ^~~~
Main.cpp:18:20: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   18 | void maxl(auto &a, auto b) {a = max(a, b);}
      |                    ^~~~
Main.cpp:19:11: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   19 | void minl(auto &a, auto b) {a = min(a, b);}
      |           ^~~~
Main.cpp:19:20: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   19 | void minl(auto &a, auto b) {a = min(a, b);}
      |                    ^~~~
Main.cpp: In function 'void build(int, int, int)':
Main.cpp:29:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   29 |     if (l == r) return; int mid = l + r >> 1;
      |     ^~
Main.cpp:29:25: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   29 |     if (l == r) return; int mid = l + r >> 1;
      |                         ^~~
Main.cpp:29:37: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   29 |     if (l == r) return; int mid = l + r >> 1;
      |                                   ~~^~~
Main.cpp: In function 'void upd(int, int, ll, int, int, int)':
Main.cpp:48:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   48 |     int mid = l + r >> 1; down(s);
      |               ~~^~~
Main.cpp: In function 'll get(int, int, int, int, int)':
Main.cpp:56:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   56 |     int mid = l + r >> 1; down(s); ll ans = 0;
      |               ~~^~~
Main.cpp: In function 'void solve()':
Main.cpp:103:13: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
  103 |             if (cost <= 0) break; pqh.joint(u, l); upd(l, r, cost); u = l;
      |             ^~
Main.cpp:103:35: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
  103 |             if (cost <= 0) break; pqh.joint(u, l); upd(l, r, cost); u = l;
      |                                   ^~~
Main.cpp: In function 'int main()':
Main.cpp:115:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  115 |         freopen("code.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:116:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  116 |         freopen("code.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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