A1144. The Missing Number
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<iostream>
#include<cstdio>
#include<map>
using namespace std;
map<int,bool>mp;
int main(){
int N;
scanf("%d", &N);
for(int i = ; i < N; i++){
int num;
scanf("%d", &num);
if(num > ){
mp[num] = true;
}
}
for(long long i = ; i < ; i++){
if(mp.count(i) == ){
printf("%lld", i);
break;
}
}
cin >> N;
return ;
}
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