566. Reshape the Matrix（2017/11/3）
这是一道关于二维向量的题目。
提示：1.关于二维向量的输入：
vectorvectorint>>
test;
vectorint>
v;
//输入
for
(int i =
0; i
v.clear();
//每次记得clear:)
for
(int j =
0; j
cin
>> temp;
v.push_back(temp);
}
287. Find the Duplicate Number
题目链接
题解：
class Solution {
public:
int findDuplicate(vector& nums) {
mapa;
vector::iterator it;
for(it=nums.begin();it!=nums.end();it++){
if(a[*it]==0){
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