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Submission #528822

# Submission time Handle Problem Language Result Execution time Memory
528822 2022-02-21T14:08:04 Z perchuts Ice Hockey World Championship (CEOI15_bobek) C++17
10 / 100
 190 ms 8624 KB 
#include <bits/stdc++.h>
#define maxn (int)(1e5+51)
#define all(x) x.begin(), x.end()
#define sz(x) (int) x.size()
#define endl '\n'
#define ll long long
#define pb push_back
#define ull unsigned long long
#define ii pair<int,int>
#define iii tuple<int,int,int>
#define inf 2000000001
#define mod 1000000007 //998244353
#define _ ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);

using namespace std;

template<typename X, typename Y> bool ckmin(X& x, const Y& y) { return (y < x) ? (x=y,1):0; }
template<typename X, typename Y> bool ckmax(X& x, const Y& y) { return (x < y) ? (x=y,1):0; }

int n;ll m, c[50];    

vector<ll>rsums;

ll generate(int x,bool flag){
    int st = ((n+1)/2)*flag;
    ll sum = 0;
    while(x){
        if(x&1)sum += c[st];
        st++;
        x>>=1;
    }
    return sum;
}


int main(){_
    cin>>n>>m;
    for(int i=0;i<n;++i)cin>>c[i];

    for(int i=0;i<(1<<(n/2));++i)rsums.pb(generate(i,1));
    
    ll ans = 0;

    auto binsearch = [&](ll x){
        int l = 0, r = sz(rsums)-1, ans = -1;
        while(l<=r){
            int md = l + (r-l+1)/2;
            if(rsums[md]<=x)ans = md, l = md + 1;
            else r = md - 1;
        }
        return ans+1;
    };

    for(int i=0;i<(1<<((n+1)/2));++i){
        ll lsum = generate(i,0);
        ans += 1LL*binsearch(m-lsum);
    }
    cout<<ans<<endl;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 324 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 320 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 312 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 336 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 15 ms 956 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 20 ms 1488 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 31 ms 1488 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 149 ms 4552 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 18 ms 948 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 190 ms 8624 KB Output isn't correct
2 Halted 0 ms 0 KB -