Submission #979693

#	Time	Username	Problem	Language	Result	Execution time	Memory
979693		hugo_pm	Fish 3 (JOI24_fish3)	C++17	9 / 100	2057 ms	6944 KiB

Main

#include <bits/stdc++.h>
#define int long long
using namespace std;

#define all(v) (v).begin(), (v).end()
#define rall(v) (v).rbegin(), (v).rend()
#define rep(i, a, b) for(int i = (a); i < (b); i++)
#define sz(v) ((int)((v).size()))

template<typename T>
void chmax(T &x, const T &v) { if (x < v) x = v; }
template<typename T>
void chmin(T &x, const T &v) { if (x > v) x = v; }

using pii = pair<int, int>;
using vi = vector<int>;
using ll = long long;

string to_string(string s) { return s; }
template <typename T> string to_string(T v) {
    bool first = true;
    string res = "[";
    for (const auto &x : v) {
        if (!first)
            res += ", ";
        first = false;
        res += to_string(x);
    }
    res += "]";
    return res;
}

template <typename A, typename B>
string to_string(pair<A, B> p) {
  return "(" + to_string(p.first) + ", " + to_string(p.second) + ")";
}

void dbg_out() { cout << endl; }
template <typename Head, typename... Tail> void dbg_out(Head H, Tail... T) {
    cout << ' ' << to_string(H);
    dbg_out(T...);
}

#ifdef DEBUG
#define dbg(...) cout << "(" << #__VA_ARGS__ << "):", dbg_out(__VA_ARGS__)
#else
#define dbg(...)
#endif

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int nbFish, delta;
    cin >> nbFish >> delta;
    vector<int> ideal(nbFish);
    rep(i, 0, nbFish) {
        cin >> ideal[i];
    }
    int nbReq; cin >> nbReq;
    rep(iReq, 0, nbReq) {
        int lft, rgt;
        cin >> lft >> rgt;
        --lft, --rgt;
        int curVal = ideal[rgt];
        int answer = 0;
        for (int iFish = rgt-1; iFish >= lft; --iFish) {
            chmin(curVal, ideal[iFish]);
            // ideal - giveA*D <= curVal
            // ideal - curVal <= giveA*D
            int giveA = (ideal[iFish] - curVal + delta - 1) / delta;
            curVal = ideal[iFish] - giveA*delta;
            if (curVal < 0) {
                answer = -1;
                break;
            }
            answer += giveA;
        }
        cout << answer << '\n';
    }
}

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