{"raw_statement":[{"iden":"problem statement","content":"There is an empty array. The following $N$ operations will be performed to insert integers into the array. In the $i$\\-th operation $(1≤i≤N)$, $b_i$ copies of an integer $a_i$ are inserted into the array. Find the $K$\\-th smallest integer in the array after the $N$ operations. For example, the $4$\\-th smallest integer in the array ${1,2,2,3,3,3}$ is $3$."},{"iden":"constraints","content":"*   $1≤N≤10^5$\n*   $1≤a_i,b_i≤10^5$\n*   $1≤K≤b_1…+…b_N$\n*   All input values are integers."},{"iden":"input","content":"Input is given from Standard Input in the following format:\n\n$N$ $K$\n$a_1$ $b_1$\n$:$  \n$a_N$ $b_N$"},{"iden":"sample input 1","content":"3 4\n1 1\n2 2\n3 3"},{"iden":"sample output 1","content":"3\n\nThe resulting array is the same as the one in the problem statement."},{"iden":"sample input 2","content":"10 500000\n1 100000\n1 100000\n1 100000\n1 100000\n1 100000\n100000 100000\n100000 100000\n100000 100000\n100000 100000\n100000 100000"},{"iden":"sample output 2","content":"1"}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}