1144. The Missing Number (20)
Given N integers, you are supposed to find the smallest positive integer that is NOT in the given list.
Input Specification:
Each input file contains one test case. For each case, the first line gives a positive integer N (<= 105). Then N integers are given in the next line, separated by spaces. All the numbers are in the range of int.
Output Specification:
Print in a line the smallest positive integer that is missing from the input list.
Sample Input:
10
5 -25 9 6 1 3 4 2 5 17
Sample Output:
7
题目大意:
代码:
#include<stdio.h>
#include<map>
using namespace std;
map<int,int> Map;
int main()
{
int i,j,n,m,k=0,t;
scanf("%d",&n);
for(i=0;i<n;i++)
{
scanf("%d",&m);
if(m>k)
k=m;
Map[m]=1;
}
for(i=1;i<=k+1;i++)
{
if(Map.find(i)==Map.end())
{
printf("%d",i);
break;
}
}
return 0;
}
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