I am experiencing an error in my code for finding the sum of vertical integers in a vector in which I have my own input but my VS code is throwing error

verticalSUM.cpp:8:9: error: expected expression
V = {{1,2,3,4},{5,6,7},{8,9}};

#include <iostream>
#include <vector>

using namespace std;

int main(){
    vector<vector<int> > V;
    V = {{1,2,3,4},{5,6,7},{8,9}};
    int max_col = V[0].size();
    for (int i = 1;i<V.size();i++){
        if (max_col>V[i].size()){
            max_col = V[i].size();
        }
    }
    vector <int> sum(max_col,0);

    for (int j = 0;j<sum.size();j++){
        for (const auto vec:V ){
            if (j<vec.size()){
                sum[j] += vec[j];
            }
        }
    }
    int min_col = 0;
    for (int k = 0;k<sum.size();k++){
        if (min_col>sum[k]){
            min_col = sum[k];
        }
    }
    cout<<"minimum vertical sum is: "<<min_col;
    return 0;
}