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View Compilation Error

0_0_14105854_5584.cpp:52:13: error: no matching function for call to 'Node::Node()'
 Node a[MAX_N],b[MAX_N];
             ^
0_0_14105854_5584.cpp:52:13: note: candidates are:
0_0_14105854_5584.cpp:30:5: note: Node::Node(int, int, int, int)
     Node (int _x, int _y, int _r, int _i) {
     ^
0_0_14105854_5584.cpp:30:5: note:   candidate expects 4 arguments, 0 provided
0_0_14105854_5584.cpp:25:8: note: constexpr Node::Node(const Node&)
 struct Node { 
        ^
0_0_14105854_5584.cpp:25:8: note:   candidate expects 1 argument, 0 provided
0_0_14105854_5584.cpp:25:8: note: constexpr Node::Node(Node&&)
0_0_14105854_5584.cpp:25:8: note:   candidate expects 1 argument, 0 provided
0_0_14105854_5584.cpp:52:22: error: no matching function for call to 'Node::Node()'
 Node a[MAX_N],b[MAX_N];
                      ^
0_0_14105854_5584.cpp:52:22: note: candidates are:
0_0_14105854_5584.cpp:30:5: note: Node::Node(int, int, int, int)
     Node (int _x, int _y, int _r, int _i) {
     ^
0_0_14105854_5584.cpp:30:5: note:   candidate expects 4 arguments, 0 provided
0_0_14105854_5584.cpp:25:8: note: constexpr Node::Node(const Node&)
 struct Node { 
        ^
0_0_14105854_5584.cpp:25:8: note:   candidate expects 1 argument, 0 provided
0_0_14105854_5584.cpp:25:8: note: constexpr Node::Node(Node&&)
0_0_14105854_5584.cpp:25:8: note:   candidate expects 1 argument, 0 provided


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