Submission #1168356

#	Time	Username	Problem	Language	Result	Execution time	Memory
1168356		steveonalex	Mixture (BOI20_mixture)	C++20	0 / 100	0 ms	328 KiB

Mixture

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef unsigned long long ull;

#define MASK(i) (1ULL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
#define ALL(v) (v).begin(), (v).end()

ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}
ll gcd(ll a, ll b){return __gcd(a, b);}
ll lcm(ll a, ll b){return a / gcd(a, b) * b;}

ll LASTBIT(ll mask){return (mask) & (-mask);}
int pop_cnt(ull mask){return __builtin_popcountll(mask);}
int ctz(ull mask){return __builtin_ctzll(mask);}
int logOf(ull mask){return 63 - __builtin_clzll(mask);}

mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
ll rngesus(ll l, ll r){return l + (ull) rng() % (r - l + 1);}
double rngesus_d(double l, double r){
    double cur = rngesus(0, MASK(60) - 1);
    cur /= MASK(60) - 1;
    return l + cur * (r - l);
}

template <class T1, class T2>
    bool maximize(T1 &a, T2 b){
        if (a < b) {a = b; return true;}
        return false;
    }

template <class T1, class T2>
    bool minimize(T1 &a, T2 b){
        if (a > b) {a = b; return true;}
        return false;
    }

template <class T>
    void printArr(T container, string separator = " ", string finish = "\n", ostream &out = cout){
        for(auto item: container) out << item << separator;
        out << finish;
    }

template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }

pair<ll, ll> get_vector(ll x, ll y, ll z, ll a, ll b, ll c){
    ll _x = x, _a = a;
    x *= _a; y *= _a; z *= _a;
    a *= _x; b *= _x; c *= _x;

    ll f = y - b, s = z - c;
    if (f != 0 || s != 0){
        ll g = gcd(abs(f), abs(s));
        f /= g; s /= g;
    }
    return make_pair(f, s);
}

ll sign(ll x){return (x > 0) - (x < 0);}

ll calc(vector<pair<ll, ll>> line){
//    for(auto i: line) cout << i.first << " " << i.second << "\n";
    for(pair<ll, ll> i: line) if (i.first == 0 && i.second == 0) return 1;
    int n = line.size();
    for(int i = 0; i < n; ++i) for(int j = i+1; j < n; ++j){
        if (line[i].first == -line[j].first && line[i].second == -line[j].second)
            return 2;
    }

    // check if ans exist
    int mask = 0;
    for(int i = 0; i < n; ++i) for(int j = i; j < n; ++j){
        pair<ll, ll> x = line[i], y = line[j];
        if (i == j){
            if (x.second == 0) {
                if (x.first > 0) mask |= 4;
                else mask |= 8;
            }
            if (x.first == 0){
                if (x.second > 0) mask |= 1;
                else mask |= 2;
            }
        }
        if (x.first * y.first < 0){
            ll s = x.second * abs(y.first) + y.second * abs(x.first);
            if (s > 0) mask |= 1;
            else mask |= 2;
        }
        if (x.second * y.second < 0){
            ll s = abs(x.second) * y.first + abs(y.second) * x.first;
            if (s > 0) mask |= 4;
            else mask |= 8;
        }
    }
    if ((mask & 3) != 3 && (mask & 12) != 12) return 0;

    return 3;
}

void solve(){
    ll x, y, z; cin >> x >> y >> z;
    int n; cin >> n;

    vector<pair<ll, ll>> dish(1);
    vector<bool> deactivated(1);

    for(int i= 1; i <= n; ++i){
        char type; cin >> type;
        if (type == 'A'){
            ll a, b, c; cin >> a >> b >> c;
            pair<ll, ll> p = get_vector(x, y, z, a, b, c);
            dish.push_back(p);
            deactivated.push_back(0);
            if (x == 0 && a > 0) deactivated.back() = 1;
            if (y == 0 && b > 0) deactivated.back() = 1;
            if (z == 0 && c > 0) deactivated.back() = 1;
        }
        else{
            int r; cin >> r;
            deactivated[r] = 1;
        }

        vector<pair<ll, ll>> real;
        for(int j = 1; j < (int) dish.size(); ++j) if (!deactivated[j])
            real.push_back(dish[j]);

        cout << calc(real) << "\n";
    }
}

int main(void){
    ios::sync_with_stdio(0);cin.tie(0); cout.tie(0);
    clock_t start = clock();

    solve();

    cerr << "Time elapsed: " << clock() - start << " ms!\n";
    return 0;
}

• Subtask 1: 0 / 13
• Subtask 2: 0 / 17
• Subtask 3: 0 / 30
• Subtask 4: 0 / 40