c++ - initialize 1000 map elements -

just can initialize vectors as:

  vector<int> var1(2000,1); 

is possible initialize map;

  map<int, int>var2; 

for 2000 variables...the reason why want initialize two:

1. in case access element in future e.g. map[100]..i want map[100]=0
2. the second reason using minimum priority queue comparison uses second value of map i.e. value stored in map[0]...map[100].
3. i don't want use vectors indices skewed , leads lot of wasted space...i.e. indices map[0], map[30], map[56],map[100],map[120],map[190], etc.

is there way can initialize map 1000 variables...i open using other data structure.

also conventional way of initializing map i.e.

  map<int, int> m = map_list_of (1,2) (3,4) (5,6) (7,8); 

the above way not work in case...is there other way out.please help

edit: can not use loop as:

this way key remains fixed don't want since distribution of keys skewed. in essence applying loop in way same of vector , don't want

you can using surrogate instead of int in map, this:

#include <iostream> #include <map>  using namespace std;  struct surrogate_int {     int val;     surrogate_int() : val(1) {}     surrogate_int& operator=(const int v) { val=v; }     operator const int() { return val; } };  int main() { map<int,surrogate_int> m;     m[5] = 5;     m[7] = 7;     m[9] = 9;     (int = 0 ; != 10 ; i++) {         cout << << ":" << m[i] << endl;     } return 0; }