Submission #342572

#	Time	Username	Problem	Language	Result	Execution time	Memory
342572		dxz05	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	47 / 100	2773 ms	13596 KiB

sortbooks

//#pragma GCC optimize("Ofast")

#include <bits/stdc++.h>

using namespace std;

void debug_out() { cerr << endl; }

template<typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
    cerr << "[" << H << "]";
    debug_out(T...);
}

#ifdef dddxxz
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#else
#define debug(...) 42
#endif

#define SZ(s) ((int)s.size())

clock_t startTime;

double getCurrentTime() {
    return (double) (clock() - startTime) / CLOCKS_PER_SEC;
}

typedef long long ll;
//mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
const double eps = 0.00001;
const int MOD = 1e9 + 7;
const int INF = 1000000101;
const long long LLINF = 1223372000000000555;
const int N = 1e6 + 4e4;
const int M = 1234;
const int LOG = 18;

vector<int> pos[M];

int a[N];
int cnt[N];

int table[LOG][N], Log[N];
void build_table(int n){
    for (int i = 2; i <= n; i++) Log[i] = Log[i / 2] + 1;
    for (int i = 0; i < LOG; i++){
        for (int j = 1; j <= n; j++){
            if (i == 0){
                table[i][j] = a[j];
            } else {
                int x = j + (1 << (i - 1));
                table[i][j] = max(table[i - 1][j], table[i - 1][x]);
            }
        }
    }
}

int get(int l, int r){
    if (l > r) return 0;
    int x = Log[r - l + 1];
    return max(table[x][l], table[x][r - (1 << x) + 1]);
}

void solve(int TC) {
    int n, q;
    cin >> n >> q;

    bool small = true;
    for (int i = 1; i <= n; i++){
        cin >> a[i];
        if (a[i] > 1000) small = false; else
            pos[a[i]].push_back(i);
    }

    if (small){
        build_table(n);

        while (q--){
            int l, r, k;
            cin >> l >> r >> k;
            bool ok = true;
            for (int x = 0; x <= 1000; x++){
                if (pos[x].empty() || pos[x].back() < l) continue;
                int ind = upper_bound(pos[x].begin(), pos[x].end(), r) - pos[x].begin() - 1;
                if (ind < 0 || ind >= pos[x].size() || pos[x][ind] < l || pos[x][ind] > r) continue;
                ind = pos[x][ind];
                int y = get(l, ind - 1);
                if (y > x && x + y > k){
                    ok = false;
                    break;
                }
            }
            cout << ok << endl;
        }
        return;
    }

    if (n <= 5000 && q <= 5000){
        while (q--){
            int l, r, k;
            cin >> l >> r >> k;
            set<int> s;
            bool ok = true;
            for (int i = l; i <= r; i++){
                if (i > l){
                    int x = *s.rbegin();
                    if (x > a[i] && x + a[i] > k){
                        ok = false;
                        break;
                    }
                }
                s.insert(a[i]);
            }
            cout << ok << endl;
        }
    } else {
        for (int i = 2; i <= n; i++) {
            cnt[i] = cnt[i - 1] + (a[i] < a[i - 1]);
        }

        while (q--) {
            int l, r, k;
            cin >> l >> r >> k;
            cout << (cnt[r] == cnt[l]) << endl;
        }
    }


}

int main() {
    startTime = clock();
    ios_base::sync_with_stdio(false);

    bool llololcal = false;
#ifdef dddxxz
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    llololcal = true;
#endif

    int TC = 1;
    //cin >> TC;

    for (int test = 1; test <= TC; test++) {
        debug(test);
        solve(test);
    }

    if (llololcal) cerr << endl << "Time: " << getCurrentTime() * 1000 << " ms" << endl;

    return 0;
}

Compilation message (stderr)

sortbooks.cpp: In function 'void solve(int)':
sortbooks.cpp:86:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   86 |                 if (ind < 0 || ind >= pos[x].size() || pos[x][ind] < l || pos[x][ind] > r) continue;
      |                                ~~~~^~~~~~~~~~~~~~~~
sortbooks.cpp: In function 'int main()':
sortbooks.cpp:18:20: warning: statement has no effect [-Wunused-value]
   18 | #define debug(...) 42
      |                    ^~
sortbooks.cpp:147:9: note: in expansion of macro 'debug'
  147 |         debug(test);
      |         ^~~~~

• Subtask 1: 8 / 8
• Subtask 2: 9 / 9
• Subtask 3: 13 / 13
• Subtask 4: 17 / 17
• Subtask 5: 0 / 30
• Subtask 6: 0 / 23