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int sumAtKthLevel(node*root, int k){
	int sum=0;
	if(root == NULL){
		return 0;
	}
	if(k==1){
		sum+=root->data;
		return sum;
	}
	sumAtKthLevel(root->left,k-1);
	sumAtKthLevel(root->right,k-1);
}

Main.java:1: error: class, interface, or enum expected
int sumAtKthLevel(node*root, int k){
^
Main.java:3: error: class, interface, or enum expected
	if(root == NULL){
	^
Main.java:5: error: class, interface, or enum expected
	}
	^
Main.java:8: error: class, interface, or enum expected
		return sum;
		^
Main.java:9: error: class, interface, or enum expected
	}
	^
Main.java:11: error: class, interface, or enum expected
	sumAtKthLevel(root->right,k-1);
	^
Main.java:12: error: class, interface, or enum expected
}
^
7 errors

Standard output is empty