Submission #803467

#	Time	Username	Problem	Language	Result	Execution time	Memory
803467		raysh07	Ice Hockey World Championship (CEOI15_bobek)	C++17	100 / 100	58 ms	31156 KiB

bobek

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define INF (int)1e18
#define f first
#define s second
 
mt19937_64 RNG(chrono::steady_clock::now().time_since_epoch().count());
 
vector <int> gen(vector <int> a){
    vector <int> v;
    v.push_back(0);
    
    for (auto x : a){
        vector <int> nv;
        
        int p1 = 0;
        
        for (auto y : v){
            while (v[p1] + x < y){
                nv.push_back(v[p1] + x);
                p1++;
            } 
            
            nv.push_back(y);
        }
        
        while (p1 != v.size()){
            nv.push_back(v[p1] + x);
            p1++;
        }
        
        v = nv;
    }
    return v;
}
 
void Solve() 
{
    int n, m; cin >> n >> m;
    
    vector <int> a, b;
    for (int i = 0; i < n; i++){
        int x; cin >> x;
        if (i < 20){
            a.push_back(x);
        } else {
            b.push_back(x);
        }
    }
    
    vector <int> v1 = gen(a);
    vector <int> v2 = gen(b);
    
    // sort(v1.begin(), v1.end());
    // sort(v2.begin(), v2.end());
    int ptr = 0;
    int ans = 0;
    reverse(v1.begin(), v1.end());
    
    for (auto x : v1){
        while (ptr != v2.size() && x + v2[ptr] <= m){
            ptr++;
        }
        
        ans += ptr;
    }
    
    cout << ans << "\n";
}
 
int32_t main() 
{
    auto begin = std::chrono::high_resolution_clock::now();
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int t = 1;
//    cin >> t;
    for(int i = 1; i <= t; i++) 
    {
        //cout << "Case #" << i << ": ";
        Solve();
    }
    auto end = std::chrono::high_resolution_clock::now();
    auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin);
    cerr << "Time measured: " << elapsed.count() * 1e-9 << " seconds.\n"; 
    return 0;
}

Compilation message (stderr)

bobek.cpp: In function 'std::vector<long long int> gen(std::vector<long long int>)':
bobek.cpp:28:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |         while (p1 != v.size()){
      |                ~~~^~~~~~~~~~~
bobek.cpp: In function 'void Solve()':
bobek.cpp:62:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |         while (ptr != v2.size() && x + v2[ptr] <= m){
      |                ~~~~^~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10