锘??xml version="1.0" encoding="utf-8" standalone="yes"?> Given an array nums, there is a sliding window of size k which is moving from the very left of the array to the very right. You can only see the k numbers in the window. Each time the sliding window moves right by one position. For example, Therefore, return the max sliding window as Note: Follow up: Hint: 鐒跺悗鏂版寚鍚戠殑鍏冪礌鍜岄槦鍒楀熬閮ㄥ厓绱犳瘮杈冿紝灝鵑儴灝忕殑鍏冪礌涔熻縐婚櫎.榪欐牱淇濇寔闃熷垪鎬繪槸鍦ㄦ粦鍔ㄧ獥鍙i噷浠庡ぇ鍒板皬鎺掑ソ. 涓漢瑙夊緱褰搆姣旇緝澶ц岃緭鍏ュ厓绱犲熀鏈殢鏈烘椂涓嶅彲鑳芥槸n澶嶆潅搴?鑰屽簲璇ユ槸(k/2)*n宸﹀彸 鎵浠ユ垜鐨勮В娉曞共鑴嗙敤涓や釜鎸囬拡:鏈澶у鹼紝絎簩澶у兼潵緇存姢.瀹為檯榪愯榪樻瘮鍙岀闃熷垪蹇竴鐐圭偣.(92ms 鍑昏觸90%)
Given nums = [1,3,-1,-3,5,3,6,7]
, and k = 3.Window position Max
--------------- -----
[1 3 -1] -3 5 3 6 7 3
1 [3 -1 -3] 5 3 6 7 3
1 3 [-1 -3 5] 3 6 7 5
1 3 -1 [-3 5 3] 6 7 5
1 3 -1 -3 [5 3 6] 7 6
1 3 -1 -3 5 [3 6 7] 7[3,3,5,5,6,7]
.
You may assume k is always valid, 1 ≤ k ≤ input array's size.
Could you solve it in linear time?
澶ф剰鏄敤鍙屽悜闃熷垪鍙互n鐨勭嚎鎬ф椂闂?緗戝弸鐨勮В娉曟剰鎬濇槸鍓嶇縐誨嚭浜嗘粦鍔ㄧ獥鍙g殑鍏冪礌瑕佺Щ闄?/p>
if(nums.size()<2)return nums;
size_t n=nums.size(), maxv=0,secondv=~0;
vector<int> out;
//secondv緇存寔絎簩澶х殑鍏冪礌.濡傛灉maxv鍦ㄧ獥鍙h竟鐣岋紝secondv灝辨槸欖旀湳~0浠h〃涓嶅瓨鍦ㄧ浜屽皬鍏冪礌.
for(size_t i=1;i<k;++i)
{
if(nums[i]>nums[maxv]){
maxv=i;
secondv=~0;
}else if(secondv==~0||nums[i]>nums[secondv]){
secondv=i;
}
}
out.push_back(nums[maxv]);
for(size_t i=k;i<n;++i)
{
if(maxv<=i-k)
{
if(secondv==~0){
maxv=i;
}else{
maxv=secondv;
secondv=secondv+1;
//maxv縐誨嚭婊戝姩紿楀彛鏃訛紝濡傛灉secondv瀛樺湪錛屾樉鐒惰鏇存柊瀹冩壘鍑烘柊鐨勭浜屽ぇ鍏冪礌.
for(size_t j=secondv+1;j<i;++j)
if(nums[j]>nums[secondv])secondv=j;
}
}
if(nums[i]>nums[maxv]){
maxv=i;
secondv=~0;
}else if(secondv==~0||nums[i]>nums[secondv]){
secondv=i;
}
out.push_back(nums[maxv]);
}
return out;
}
5涓囧涓枃浠舵覆鏌撴垚鍔熶簡4涓囧涓紝鎴戝啓浜嗕釜紼嬪簭鎶婂畠浠悎騫跺埌2560*2560鐨刾ng鍥鵑噷錛屾瘡涓浘鏈?28*128鍥炬爣400涓紝浼撮殢涓涓?c鏂囦歡鎸囧畾浜嗗浘鏍囧疄闄呭ぇ灝?姣斿
http://www.shnenglu.com/Files/FireEmissary/font2img2.zip
榪欑▼搴忔瘮杈冨寘鎷簡鐧介厭棰嗗煙鐩稿叧鐨勯厭綺懼害鏁拌漿鎹紝閰掑害浣撶Н鐧懼垎姣斿拰璐ㄩ噺鐧懼垎姣斾袱涓暟鎹枃浠?鏄垜鏍規嵁緗戜笂鐨剋ord鏂囨。杞爜鎴恡xt鍐嶈瀵熺粨鏋勶紝鍒犳帀騫叉壈閮ㄥ垎鐒跺悗
鍐欎釜鏁版嵁璇誨彇紼嬪簭杞崲鑰屾垚錛涜嚜宸辨暡鎴愪唬鐮佸彲娌¤繖涔堣交鏉?
鏈夐渶瑕佺殑浜哄+鍙互鏀懼績浣跨敤鎴戠殑浠g爜鍜岀▼搴?瀹屽叏鍏嶈垂(MIT璁稿彲)