Submission #1101396

#	Time	Username	Problem	Language	Result	Execution time	Memory
1101396		nasir_bashirov	Ice Hockey World Championship (CEOI15_bobek)	C++11	100 / 100	439 ms	22952 KiB

bobek

// #pragma GCC optimize("O3,unroll-loops")
// #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define vi vector<int>
#define vl vector<ll>
#define vii vector<pii>
#define db long double
#define vll vector<pll>
#define endl '\n'
#define all(x) x.begin(), x.end()
#define fastio ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

#define int long long

int a[45], n, m;

void fmain(){
    cin >> n >> m;
    for(int i = 1; i <= n; i++){
        cin >> a[i];
    }
    vi v1, v2;
    vi a1, a2;
    for(int i = 1; i <= n / 2; i++){
        a1.push_back(a[i]);
    }
    for(int i = n / 2 + 1; i <= n; i++){
        a2.push_back(a[i]);
    }
    for(int mask = 0; mask < (1 << (int)a1.size()); mask++){
        int s = 0;
        for(int i = 0; i < a1.size(); i++){
            if((1 << i) & mask){
                s += a1[i];
            }
        }
        v1.push_back(s);
    }
    for(int mask = 0; mask < (1 << (int)a2.size()); mask++){
        int s = 0;
        for(int i = 0; i < a2.size(); i++){
            if((1 << i) & mask){
                s += a2[i];
            }
        }
        v2.push_back(s);
    }
    sort(all(v2));
    int res = 0;
    for(int i : v1){
        auto ind = upper_bound(all(v2), m - i);
        if(ind != v2.begin())   res += ind - v2.begin();
    }
    cout << res;
}

signed main(){
    int tmr = 1;
    //cin >> tmr;
    while(tmr--){
        fmain();
    }
}

Compilation message (stderr)

bobek.cpp: In function 'void fmain()':
bobek.cpp:38:26: 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(int i = 0; i < a1.size(); i++){
      |                        ~~^~~~~~~~~~~
bobek.cpp:47:26: 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]
   47 |         for(int i = 0; i < a2.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