leetcode

Solution to some Leetcode problems written in C++
git clone git://git.dimitrijedobrota.com/leetcode.git
Log | Files | Refs | README | LICENSE |
commit6ab4ab94636345f07aaacb244206eeb80aef0efa
parent05c8686ed873950ead89360be22fbfb967f6ec82
authorDimitrije Dobrota <mail@dimitrijedobrota.com>
dateSun, 16 Jul 2023 16:15:07 +0200

Daily Problem

Diffstat:
AProblems/1125.cpp|++++++++++++++++++++++++++++++++
MREADME.md|+

2 files changed, 33 insertions(+), 0 deletions(-)

diff --git a/Problems/1125.cpp b/Problems/1125.cpp

@@ -0,0 +1,32 @@

class Solution {
public:
vector<int> smallestSufficientTeam(vector<string> &req_skills,
vector<vector<string>> &people) {
int n = people.size(), m = req_skills.size();
unordered_map<string, int> index;
for (int i = 0; i < m; i++) index[req_skills[i]] = i;
vector<int> masks(n);
for (int i = 0; i < n; i++) {
for (string skill : people[i]) masks[i] |= 1 << index[skill];
}
vector<long long> dp(1 << m, (1LL << n) - 1);
dp[0] = 0;
for (int mask = 1; mask < (1 << m); mask++) {
for (int i = 0; i < n; i++) {
int smask = mask & ~masks[i];
if (smask == mask) continue;
long long pmask = dp[smask] | (1LL << i);
if (__builtin_popcountll(pmask) < __builtin_popcountll(dp[mask]))
dp[mask] = pmask;
}
}
long long answerMask = dp[(1 << m) - 1];
vector<int> res;
for (int i = 0; i < n; i++) {
if ((answerMask >> i) & 1) res.push_back(i);
}
return res;
}
};

diff --git a/README.md b/README.md

@@ -425,6 +425,7 @@ for solving problems.

| 1091 | Medium | [Shortest Path in Binary Matrix](Problems/1091.cpp) |
| 1095 | Easy | [Find Numbers with Even Number of Digits](Problems/1095.cpp) |
| 1099 | Easy | [Replace Elements with Greatest Element on Right Side](Problems/1099.cpp) |
| 1125 | Hard | [Smallest Sufficient Team](Problems/1125.cpp) |
| 1129 | Medium | [Shortest Path with Alternating Colors](Problems/1129.cpp) |
| 1137 | Easy | [N-th Tribonacci Number](Problems/1137.cpp) |
| 1140 | Medium | [Stone Game II](Problems/1140.cpp) |