Submission #970308

#	Time	Username	Problem	Language	Result	Execution time	Memory
970308		Whisper	Rice Hub (IOI11_ricehub)	C++17	100 / 100	10 ms	3420 KiB

ricehub

#include <bits/stdc++.h>
//#include <ricehub.h>

using namespace std;
using ll = long long;

//#define int long long
#define FOR(i, a, b) for (int i = a; i <= b; i++)
#define FORD(i, a, b) for (int i = b; i >= a; i --)
#define REP(i, n) for (int i = 0; i < n; ++i)
#define REPD(i, n) for (int i = n - 1; i >= 0; --i)

#define MASK(i) (1LL << (i))
#define BIT(x, i) (((x) >> (i)) & 1)

constexpr ll LINF = (1ll << 60);
constexpr int INF = (1ll << 30);
constexpr int Mod = 1e9 + 7;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

//void setupIO(){
//    #define name "Whisper"
//    //Phu Trong from Nguyen Tat Thanh High School for gifted student
//    srand(time(NULL));
//    cin.tie(nullptr)->sync_with_stdio(false); cout.tie(nullptr);
//    freopen(name".inp", "r", stdin);
//    freopen(name".out", "w", stdout);
//    cout << fixed << setprecision(10);
//}

template <class X, class Y>
    bool minimize(X &x, const Y &y){
        X eps = 1e-9;
        if (x > y + eps) {x = y; return 1;}
        return 0;
    }

template <class X, class Y>
    bool maximize(X &x, const Y &y){
        X eps = 1e-9;
        if (x + eps < y) {x = y; return 1;}
        return 0;
    }

const int MAX = 1e5 + 5;
ll nArr, Lim, A[MAX], numCoin;
ll prf[MAX];
bool check(int d){
    for (int i = 1; i <= nArr - d + 1; ++i){
        int id = i + (d / 2);
        ll tot = A[id] * (id - i + 1) - (prf[id] - prf[i - 1]) + (prf[i + d - 1] - prf[id - 1]) - (A[id] * (i + d - 1 - id + 1));
        if (tot <= numCoin) return 1;
    }
    return 0;
}
int besthub(int RR, int LL, int X[], ll B){
    nArr = RR, Lim = LL, numCoin = B;
    FOR(i, 1, nArr) A[i] = X[i - 1];
    FOR(i, 1, nArr) prf[i] = prf[i - 1] + A[i];
    int l = 1, r = nArr;
    int ans = 1;
    while (l <= r){
        int mid = (l + r) >> 1;
        if(check(mid)) l = mid + 1, ans = mid;
        else r = mid - 1;
    }
    return ans;
}
//int a[MAX];
//void Whisper(){
//    int R, L, B; cin >> R >> L >> B;
//    FOR(i, 0, R - 1) cin >> a[i];
//    cout << besthub(R, L, a, B);
//}
//
//
//signed main(){
//    setupIO();
//    int Test = 1;
////    cin >> Test;
//    for ( int i = 1 ; i <= Test ; i++ ){
//        Whisper();
//        if (i < Test) cout << '\n';
//    }
//}

• Subtask 1: 17 / 17
• Subtask 2: 25 / 25
• Subtask 3: 26 / 26
• Subtask 4: 32 / 32