열별 평균보다 높은 칸

#include <iostream>
#include <vector>
using namespace std;

int solution(vector<vector<int>> board) {
    int rows = (int)board.size(), cols = (int)board[0].size();
    vector<int> average(cols, 0);
    for (int r = 0; r < rows; ++r)
        for (int c = 0; c < cols; ++c) average[c] += /*@blank1@*/;
    for (int c = 0; c < cols; ++c) average[c] /= rows;
    int answer = 0;
    for (int r = 0; r < rows; ++r)
        for (int c = 0; c < cols; ++c)
            if (/*@blank2@*/) ++answer;
    return answer;
}

int main() {
    int rows, cols; cin >> rows >> cols;
    vector<vector<int>> board(rows, vector<int>(cols));
    for (int r = 0; r < rows; ++r)
        for (int c = 0; c < cols; ++c) cin >> board[r][c];
    cout << solution(board) << '\n';
    return 0;
}