Submission #1264808

#	Time	Username	Problem	Language	Result	Execution time	Memory
1264808		SoMotThanhXuan	Osumnjičeni (COCI21_osumnjiceni)	C++20	110 / 110	438 ms	27624 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#define F first
#define S second
#define FOR(i, a, b) for(int i = (a), _b = (b); i <= _b; ++i)
#define REP(i, a, b) for(int i = (a), _b = (b); i >= _b; --i)
#define mp make_pair
#define all(v) v.begin(), v.end()
#define uni(v) v.erase(unique(all(v)), v.end())
#define Bit(x, i) ((x >> (i)) & 1)
#define Mask(i) (1 << (i))
#define Cnt(x) __builtin_popcount(x)
#define Cntll(x) __builtin_popcountll(x)
#define Ctz(x) __builtin_ctz(x)
#define Ctzll(x) __builtin_ctzll(x)
#define Clz(x) __builtin_clz(x)
#define Clzll(x) __builtin_clzll(x)
inline bool maximize(int &u, int v){ return v > u ? u = v, true : false; }
inline bool minimize(int &u, int v){ return v < u ? u = v, true : false; }
inline bool maximizell(long long &u, long long v){ return v > u ? u = v, true : false; }
inline bool minimizell(long long &u, long long v){ return v < u ? u = v, true : false; }
const int mod = 1e9 + 7;
inline int fastPow(int a, int n){
    if(n == 0) return 1;
    int t = fastPow(a, n >> 1);
    t = 1ll * t * t % mod;
    if(n & 1) t = 1ll * t * a % mod;
    return t;
}
inline void add(int &u, int v){ u += v; if(u >= mod) u -= mod; }
inline void sub(int &u, int v){ u -= v; if(u < 0) u += mod; }
const int maxN = 2e5 + 5;
const int inf = 1e9;
const long long infll = 1e18;
int n, l[maxN], r[maxN], q;
vector<int> comp;
int it[maxN << 3], lz[maxN << 3];
void build(int id, int l, int r){
    if(l == r){
        it[id] = inf;
        lz[id] = inf;
        return;
    }
    int mid = l + r >> 1;
    build(id << 1, l, mid);
    build(id << 1 | 1, mid + 1, r);
    it[id] = inf;
    lz[id] = inf;
}
void push(int id){
    if(lz[id] == inf) return;
    FOR(v, id << 1, id << 1 | 1){
        minimize(lz[v], lz[id]);
        minimize(it[v], lz[id]);
    }
    lz[id] = inf;
    return;
}
void update(int id, int l, int r, int u, int v, int w){
    if(l > v || r < u) return;
    if(l >= u && r <= v){
        minimize(it[id], w);
        minimize(lz[id], w);
        return;
    }
    push(id);
    int mid = l + r >> 1;
    update(id << 1, l, mid, u, v, w);
    update(id << 1 | 1, mid + 1, r, u, v, w);
    it[id] = min(it[id << 1], it[id << 1 | 1]);
}
int get(int id, int l, int r, int u, int v){
    if(l >= u && r <= v) return it[id];
    int mid = l + r >> 1;
    push(id);
    if(v <= mid) return get(id << 1, l, mid, u, v);
    if(u > mid) return get(id << 1 | 1, mid + 1, r, u, v);
    return min(get(id << 1, l, mid, u, v), get(id << 1 | 1, mid + 1, r, u, v));
}
int nxt[maxN][18], lg[maxN];
void process(){
    cin >> n;
    FOR(i, 1, n){
        cin >> l[i] >> r[i];
        comp.emplace_back(l[i]);
        comp.emplace_back(r[i]);
    }
    sort(all(comp));
    uni(comp);
    int sz = comp.size();
    build(1, 1, sz);
    FOR(i, 1, n){
        l[i] = lower_bound(all(comp), l[i]) - comp.begin() + 1;
        r[i] = lower_bound(all(comp), r[i]) - comp.begin() + 1;
    }
    nxt[n][0] = n;
    update(1, 1, sz, l[n], r[n], n);
    REP(i, n - 1, 1){
        int minId = get(1, 1, sz, l[i], r[i]);
        nxt[i][0] = min(minId - 1, nxt[i + 1][0]);
        update(1, 1, sz, l[i], r[i], i);
    }

    FOR(i, 2, n)lg[i] = lg[i >> 1] + 1;
    FOR(j, 0, lg[n])nxt[n + 1][j] = 0;
    FOR(j, 1, lg[n]){
        FOR(i, 1, n)
            if(nxt[i][j - 1] == 0)nxt[i][j] = 0;
            else
            nxt[i][j] = nxt[nxt[i][j - 1] + 1][j - 1];
    }


//    FOR(j, 0, lg[n]){
//        FOR(i, 1, n)cout << nxt[i][j] << ' ';
//        cout << '\n';
//    }
    cin >> q;
//    FOR(i, 1, n)cout << nxt[i][0] << ' ';cout << '\n';
    while(q--){
        int l, r;
        cin >> l >> r;
        int p = l;
        int answer = 0;
        REP(j, 17, 0){
            if(nxt[p][j] <= r && nxt[p][j] >= p){
//                cout << p << ' ' << Mask(j) << ' ' << nxt[p][j] << '\n';
                p = nxt[p][j] + 1;
                answer += Mask(j);
            }
        }

        if(p <= r)++answer;
        cout << answer << '\n';
    }
}
#define LOVE "lineup"
int main(){
    if(fopen(LOVE".inp", "r")){
        freopen(LOVE".inp", "r", stdin);
        freopen(LOVE".out", "w", stdout);
    }
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);

    int t = 1;
//    cin >> t;
    while(t--)
        process();
//    cerr << '\n' << "Time elapsed: " << (1.0 * clock() / CLOCKS_PER_SEC) << " s\n" ;
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:140:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  140 |         freopen(LOVE".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:141:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  141 |         freopen(LOVE".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 20 / 20
• Subtask 4: 20 / 20
• Subtask 5: 50 / 50