1144 The Missing Number (20 分)
 

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 (≤). 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
#include<bits/stdc++.h>
using namespace std;
typedef long long ll; int a[]; int main(){
int n;
cin >>n;
for(int i=;i < n;i++){
cin >> a[i];
} sort(a,a+n); int cnt = ; for(int i=;i < n;i++){
if(a[i] > ){
if(a[i]>cnt){
cout << cnt;
return ;
}
else if(a[i] == cnt){
cnt++;
}
}
}
cout << cnt; return ;
}

做水题的感觉也太棒了8

 

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