Submission #1066525

#	Time	Username	Problem	Language	Result	Execution time	Memory
1066525		tamthegod	Fish 3 (JOI24_fish3)	C++17	9 / 100	2073 ms	7784 KiB

Main

#include<bits/stdc++.h>

#define int long long
#define pb push_back
#define fi first
#define se second
using namespace std;
using ll = long long;
using ld = long double;
using ull = unsigned long long;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int maxN = 1e6 + 5;
const int mod = 1e9 + 7;
const ll oo = 1e18;
int n, d;
int a[maxN];
void ReadInput()
{
    cin >> n >> d;
    for(int i=1; i<=n; i++)
        cin >> a[i];
}
void Solve()
{
    int q;
    cin >> q;
    while(q--)
    {
        int l, r;
        cin >> l >> r;
        int val = oo;
        int res = 0;
        for(int i=r; i>=l; i--)
        {
            if(a[i] <= val)
            {
                val = a[i];
                continue;
            }
            if(d > a[i] || val < a[i] % d)
            {
                res = oo;
                break;
            }
            res += (a[i] - val - 1) / d + 1;
            int cur = val;
            val -= val % d;
            val += a[i] % d;
            if(val > cur) val -= d;
        }
        cout << (res < oo ? res : -1) << '\n';
    }
}
#define taskname "sol"
int32_t main()
{
    if (fopen(taskname ".inp", "r"))
    {
        freopen(taskname ".inp", "r", stdin);
        //freopen(taskname ".out", "w", stdout);
    }
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int T = 1;
    //cin >> T;
    for(int itest=1; itest<=T; itest++)
    {
        ReadInput();
        Solve();
    }
}

Compilation message (stderr)

Main.cpp: In function 'int32_t main()':
Main.cpp:59:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 |         freopen(taskname ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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