【STL】C++ pair

# include 
# include 
// 无include pair

using namespace std;

int main() {
    
    vector<pair<int, int>> level;
    
    level.push_back(make_pair(1, 2));
    for (int i = 0; i < level.size(); i ++) {
        printf("%d %d", level[i].first, level[i].second);
    }
    
    return 0;
}