oj.uz

Submission #1106859

# Submission time Handle Problem Language Result Execution time Memory
1106859 2024-10-31T08:05:06 Z matu Jakarta Skyscrapers (APIO15_skyscraper) C++14
10 / 100
 1 ms 512 KB 
#include <bits/stdc++.h>
// #include <tr2/dynamic_bitset>

using namespace std;
// using namespace tr2;
#pragma GCC optimize("O3,unroll-loops,Ofast")
//#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
const long double eps = 1e-9;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int randgen(int left, int right) {
    return uniform_int_distribution<int>(left, right)(rng);
}
long long randgenll(long long left, long long right) {
    return uniform_int_distribution<long long>(left, right)(rng);
}

typedef long long ll;
typedef long double ld;
const int mod = 1e9 + 7;
struct Mint
{
    int val;
    Mint(int x = 0)
    {
        val = x % mod;
    }
    Mint(long long x)
    {
        val = x % mod;
    }
    Mint operator+(Mint oth)
    {
        return val + oth.val;
    }
    Mint operator*(Mint oth)
    {
        return 1LL * val * oth.val;
    }
    Mint operator-(Mint oth)
    {
        return val - oth.val + mod;
    }
    Mint fp(Mint a, long long n){
        Mint p = 1;
        while(n){
            if(n & 1){
                p = p * a;
            }
            a = a * a;
            n /= 2;
        }
        return p;
    }
    Mint operator/(Mint oth){
        Mint invers = fp(oth, mod - 2);
        return 1LL * val * invers.val;
    }
    friend ostream& operator << (ostream& os, const Mint& lol){
        os << lol.val;
        return os;
    }
};

struct AINT{
    vector<pair<ll,Mint>> aint;
    vector<pair<ll,Mint>> lazy;
    pair<ll,Mint> b;
    AINT(int n){
        b = {1e18,Mint(0)};
        aint.assign(n * 4 + 1,make_pair(1e18,Mint(0)));
        lazy.assign(n * 4 + 1, make_pair(1e18, Mint(0)));
    }
    void update(int v, int tl, int tr, int l, int r, pair<ll,Mint> val){
        if(lazy[v].first != 1e18){
            if(aint[v].first == lazy[v].first){
                aint[v].second = aint[v].second + lazy[v].second;
            }else if(aint[v].first > lazy[v].first) aint[v] = lazy[v];

            if(tl != tr){
                if(lazy[v * 2].first == lazy[v].first){
                    lazy[v * 2].second = lazy[v *  2].second + lazy[v].second;
                }else if(lazy[v * 2].first > lazy[v].first) lazy[v * 2] = lazy[v];
                

                if(lazy[v * 2 + 1].first == lazy[v].first){
                    lazy[v * 2 + 1].second = lazy[v * 2 + 1].second + lazy[v].second;
                }else if(lazy[v * 2 + 1].first > lazy[v].first){
                    lazy[v * 2 + 1] = lazy[v];
                }
            }
            lazy[v] = b;
        }
        if(l <= tl && r >= tr){
            if(aint[v].first == val.first){
                aint[v].second = aint[v].second + val.second;
            }else if(aint[v].first > val.first){
                    aint[v] = val;
            }

            if(tl != tr){
                if(lazy[v * 2].first == val.first){
                    lazy[v * 2].second = lazy[v *  2].second + val.second;
                }else if(lazy[v * 2].first > val.first){
                    lazy[v * 2] = val;
                }
                

                if(lazy[v * 2 + 1].first == val.first){
                    lazy[v * 2 + 1].second = lazy[v * 2 + 1].second + val.second;
                }else if(lazy[v * 2 + 1].first > val.first){
                    lazy[v * 2 + 1] = val;
                }
            }
            return;
        }
        if(l > tr || r < tl) return;
        int tm = (tl + tr) / 2;
        update(v * 2, tl, tm, l,r , val);
        update(v * 2 + 1, tm + 1, tr, l, r, val);
        
        if(aint[v * 2].first == aint[v * 2 + 1].first){
            aint[v] = aint[v * 2];
            aint[v].second = aint[v].second + aint[v * 2 + 1].second;
        }else{
            if(aint[v * 2].first < aint[v * 2 + 1].first) aint[v] = aint[v * 2];
            else aint[v] = aint[v * 2 + 1];
        }


    }
    pair<ll,Mint> query(int v, int tl, int tr, int l, int r){
        if(lazy[v].first != 1e18){
            if(aint[v].first == lazy[v].first){
                aint[v].second = aint[v].second + lazy[v].second;
            }else if(aint[v].first > lazy[v].first) aint[v] = lazy[v];

            if(tl != tr){
                if(lazy[v * 2].first == lazy[v].first){
                    lazy[v * 2].second = lazy[v *  2].second + lazy[v].second;
                }else if(lazy[v * 2].first > lazy[v].first) lazy[v * 2] = lazy[v];
                

                if(lazy[v * 2 + 1].first == lazy[v].first){
                    lazy[v * 2 + 1].second = lazy[v * 2 + 1].second + lazy[v].second;
                }else if(lazy[v * 2 + 1].first > lazy[v].first){
                    lazy[v * 2 + 1] = lazy[v];
                }
            }
            lazy[v] = b;
        }
        if(l <= tl && r >= tr) return aint[v];
        if(l > tr || r < tl) return make_pair(1e18,Mint(0));
        int tm = (tl + tr) / 2;
        pair<ll,Mint> p1 = query(v * 2, tl ,tm, l, r);
        pair<ll,Mint> p2 = query(v * 2 + 1, tm + 1, tr, l,r);
        if(p1.first == p2.first){
            p1.second = p1.second + p2.second;
            return p1;
        }else if(p1.first < p2.first) return p1;
        return p2;

        // int tm = (tl + tr) / 2;
        // if(l <= tl && r >= tr) return aint[v];
        // if(l > tr || r < tl) return 0;
        // return max(query(v * 2, tl, tm,l,r), query(v * 2 + 1, tm + 1, tr, l,r));
        
    }
};
struct AIB{
    vector<int> aib;
    AIB(int n){
        aib.assign(n + 1,0);
    
    }
    void update(int pos, int val){
        for(; pos < aib.size(); pos += (pos & -pos)){
            aib[pos] += val;
        }
    }
    int query(int pos){
        int pl = 0;
   
        for(; pos > 0; pos -= (pos & -pos)) pl += aib[pos];
        return pl;
    }
};

int red = 0;
int ______________________________________________________________________________________________________________________________________________;


void solve(){
    int n, m;
    cin >> n >> m;
    vector<ll> dp(n + 1,1e18);
    // queue<int> q;
    priority_queue<pair<int,int>, vector<pair<int,int>>, less<pair<int,int>>> q;
    
    vector<vector<int>> lol(n + 1);
    int rot = 0, p = 0;
    for(int i = 1; i <= m; i++){
        int pos, c;
        cin >> pos >> c;
        lol[pos].push_back(c);
        if(i == 1){
            dp[pos] = 0;
            q.push({0,pos});
        }else if(i == 2){
            rot = pos;
            p = c;
        }
    }
    while(q.size()){
        pair<int,int> tetra = q.top();
        q.pop();
        if(tetra.second == rot){
            cout << dp[rot];
            return;
        }
        int nod = tetra.second;
        for(auto i : lol[nod]){
            int cnt = 0;
            for(int j = nod; j < n; j += i){
                if(dp[j] > dp[nod] + cnt){
                    dp[j] = dp[nod] + cnt;
                    q.push({dp[j], j});
                }
                cnt++;
            }
            cnt = 0;
            for(int j = nod; j >= 0; j -= i){
                if(dp[j] > dp[nod] + cnt){
                    dp[j] = dp[nod] + cnt;
                    q.push({dp[j],j});
                }
                cnt++;
            }
        }
    }
    if(dp[rot] == 1e18) cout << -1;
    else cout << dp[rot];
    return;
   
}   
int32_t main(){
    cin.tie(0)->sync_with_stdio(0);
    int t = 1; 
    if(red) cin >> t;
   
    while(t--){
        solve();
    }
 

}


/*

2 2 2 2 4
1 3 5


1 30
1 40
120 2 
2 430
100 3 
3 30
100 4 
4 490
100 5 
5 440
40 6 
6 290
50 7 
7 190
290 8 
8 430
50 9 
9 60
190 10 
10 490
*/

Compilation message

skyscraper.cpp: In member function 'void AIB::update(int, int)':
skyscraper.cpp:176:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  176 |         for(; pos < aib.size(); pos += (pos & -pos)){
      |               ~~~~^~~~~~~~~~~~
skyscraper.cpp: In function 'void solve()':
skyscraper.cpp:200:18: warning: variable 'p' set but not used [-Wunused-but-set-variable]
  200 |     int rot = 0, p = 0;
      |                  ^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 508 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 0 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 504 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Incorrect 1 ms 336 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 504 KB Output is correct
4 Correct 0 ms 336 KB Output is correct
5 Correct 0 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 0 ms 336 KB Output is correct
9 Incorrect 1 ms 336 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #4
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Incorrect 1 ms 512 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 0 ms 336 KB Output is correct
3 Correct 1 ms 508 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 504 KB Output is correct
6 Correct 0 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Incorrect 1 ms 336 KB Output isn't correct
10 Halted 0 ms 0 KB -