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how to initialize a vector of pairs in c++ Code Example
initialize 2d vector of ints c++ 
auto M = 4;	// num of rows
auto N = 3; // num of cols in each row
auto default_value = 1; // default value of all int elements
std::vector<std::vector<int>> matrix(M, std::vector<int>(N, default_value));
Source: www.techiedelight.com
how to initialize a vector of pairs in c++ 
#include <utility>

vector<pair<int, int>> myVec (N, std::make_pair(-1, -1));
Source: stackoverflow.com



Cpp

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