LeetCode 554. Brick Wall
題解
這題算是雜湊的妙用,看程式碼體會一下。
值得注意的是map與unordered_map 的效率差別很大。
給出一篇文章比較map 與unordered_map
Code
int leastBricks(vector<vector<int>>& wall) {
int res=0;
if(wall.empty()) return res;
unordered_map<int,int> mmp;
int cur_len;
for (auto li : wall){
cur_len=0;
for(int i=0;i<li.size()-1;i++){
cur_len+=li[i];
res = max(res,++mmp[cur_len]);
}
}
return wall.size()-res;
}
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