#include <bits/stdc++.h>
using namespace std;
#define int long long
#define FASTIO ios_base::sync_with_stdio(false); cin.tie(NULL);
#define all(x) (x).begin(), (x).end()
#define pb push_back
#define pii pair<int, int>
#define ff first
#define ss second
#define PI acos(-1)
#define ld long double
template<class T> bool ckmin(T& a, const T& b) {return a>b? a=b, true:false;}
template<class T> bool ckmax(T& a, const T& b) {return a<b? a=b, true:false;}
const int mod = 1e9+7, N = 2e5+5;
int msb(int val){return sizeof(int)*8-__builtin_clzll(val)-1;}
int a[N], n, m, k;
int p[N];
void solve(int test_case){
int i, j;
cin >> n >> k;
for(i=1;i<=n;i++){
cin >> p[i];
cin >> a[i];
}
int ans = 0;
for(int mask = 1; mask < (1<<n); mask++){
if(__builtin_popcount(mask) != k)continue;
vector<int> v;
for(i=0;i<n;i++){
if(mask & (1<<i))v.pb(i+1);
}
vector<bool> used(n+1);
for(auto x : v)used[x] = true;
bool is = true;
int sum = 0;
for(auto x : v){
sum += a[x];
while(p[x] != 0){
x = p[x];
if(used[x])is = false;
}
}
if(is)ckmax(ans,sum);
}
cout << ans << '\n';
return;
}
signed main(){
FASTIO;
#define MULTITEST 0
#if MULTITEST
int _T;
cin >> _T;
for(int T_CASE = 1; T_CASE <= _T; T_CASE++)
solve(T_CASE);
#else
solve(1);
#endif
return 0;
}
Compilation message
biochips.cpp: In function 'void solve(long long int)':
biochips.cpp:19:9: warning: unused variable 'j' [-Wunused-variable]
19 | int i, j;
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Correct |
1 ms |
364 KB |
Output is correct |
| 3 |
Incorrect |
1 ms |
364 KB |
Output isn't correct |
| 4 |
Halted |
0 ms |
0 KB |
- |
