Submission #1298211

#	Time	Username	Problem	Language	Result	Execution time	Memory
1298211		vibeduck	Fish 3 (JOI24_fish3)	C++20	9 / 100	1864 ms	5020 KiB

Main

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

#define pb push_back
#define pf push_front
#define mp make_pair
#define fi first
#define se second
#define int long long
#define all(x) (x).begin(), (x).end()

typedef long double ld;
typedef long long ll;
typedef pair<ll,ll> pll;
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<bool> vb;
typedef vector<vector<int>> vvi;
typedef vector<vector<bool>> vvb;
typedef vector<vector<ll>> vvll;
typedef vector<string> vs;
typedef vector<vector<string>> vvs;
typedef vector<char> vc;
typedef vector<vector<char>> vvc;
typedef map<int, int> mii;
typedef unordered_map<int, int> umii;

const int mod = 1e9 + 7;
const int inf = INTMAX_MAX;
const bool tc = false;

int n, d;
int a[3001];

int query(int l, int r) {
    // modulo
    vi v(n); v[l] = (a[l] % d);
    for (int i = l + 1; i <= r; i++) {
        int vc = (a[i] % d);
        if (vc < v[i - 1]) vc += ((v[i - 1] - vc + (d - 1))/d) * d;
        v[i] = vc;
        if (vc > a[i]) return -1;
    }

    // for (int i = l; i <= r; i++) cout << v[i] << " ";
    // cout << '\n';

    vi nxt(n, 1e18);
    for (int i = l; i <= r; i++) nxt[i] = a[i] - v[i];

    // for (int i = l; i <= r; i++) cout << nxt[i] << " ";
    // cout << '\n';

    vi suf(n); suf[n - 1] = nxt[n - 1];
    for (int i = n - 2; i >= 0; i--) suf[i] = min(nxt[i], suf[i + 1]);
    int ans = 0; for (int i = l; i <= r; i++) ans += (nxt[i] - suf[i]) / d;
    return ans;
}

inline void solve() {
    cin >> n >> d;
    for (int i = 0; i < n; i++) cin >> a[i];

    int q; cin >> q;
    while (q--) {
        int l, r;
        cin >> l >> r;
        l--; r--;
        cout << query(l, r) << '\n';
    }
}

void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}

signed main() {
    ios::sync_with_stdio(false);
    cout.tie(0);
    cin.tie(0);
    //setIO();

    int t = 1;
    if (tc) {
        cin >> t;
    }

    while (t--) {
        solve();
    }
}

Compilation message (stderr)

Main.cpp: In function 'void setIO(std::string)':
Main.cpp:75:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   75 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:76:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   76 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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