Submission #1121493

#	Time	Username	Problem	Language	Result	Execution time	Memory
1121493		vjudge1	Ice Hockey World Championship (CEOI15_bobek)	C++17	100 / 100	433 ms	20904 KiB

bobek

#include <bits/stdc++.h>
using namespace std;
 
#define ll long long
#define FORI(i, n) for(ll i = 0; i < n; i++)
#define FOR(i, n) for(ll i = 1; i <= n; i++)
typedef vector<ll> vl;
typedef set<ll> setl;
#define ff first
#define ss second
#define all(v) v.begin(), v.end()
#define pll pair<ll, ll>
#define db double
#define nll cout << "\n"
#define nl "\n"
#define sync ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
 
const ll INF = 1e9 + 7;
const int MAX = 3e5 + 5;
ll n, m, k;
ll a[MAX];
void solve(){ 
    cin >> n >> m;
    FOR(i, n)cin >> a[i];
    vl v1, v2;
    FOR(i, n / 2)v1.push_back(a[i]);
    vl a1, a2;
    for(ll i = n / 2 + 1; i <= n; i++)v2.push_back(a[i]);
    for(ll mask = 0; mask < (1 << v1.size()); mask++){
        ll sum = 0;
        for(ll i = 0; i < v1.size(); i++){
            if((1 << i) & mask)sum += v1[i ];
        }
        a1.push_back(sum);
    }
     for(ll mask = 0; mask < (1 << v2.size()); mask++){
        ll sum = 0;
        for(ll i = 0; i < v2.size(); i++){
            if((1 << i) & mask)sum += v2[i];
        }
        a2.push_back(sum);
    }
    sort(all(a2));
    ll res = 0;
    for(auto i : a1){
        res += (upper_bound(all(a2), m - i) - a2.begin());
    }
    cout << res << nl;
}
signed main(){
    sync;
    ll t = 1;
    // cin >> t;
    while(t--) {
        solve();
    }
}

Compilation message (stderr)

bobek.cpp: In function 'void solve()':
bobek.cpp:31:25: 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]
   31 |         for(ll i = 0; i < v1.size(); i++){
      |                       ~~^~~~~~~~~~~
bobek.cpp:38:25: 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]
   38 |         for(ll i = 0; i < v2.size(); i++){
      |                       ~~^~~~~~~~~~~

• 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