https://ide.codingblocks.com/s/61485
TESTCASE #1: correct (Time: 0 s)
TESTCASE #2: correct (Time: 0 s)
TESTCASE #3: correct (Time: 0 s)
TESTCASE #4: correct (Time: 0 s)
TESTCASE #5: correct (Time: 0 s)
TESTCASE #6: correct (Time: 0 s)
TESTCASE #7: run-error (Time: 0 s)
TESTCASE #8: run-error (Time: 0 s)
TESTCASE #9: run-error (Time: 0 s)