Someone hacked my solution of problem D. Now it says WA. But I can't find any mistake. Please help me to find the mistake. My submission: https://codeforces.com/contest/1520/submission/115269582
Where is the mistake? (problem D)
Someone hacked my solution of problem D. Now it says WA. But I can't find any mistake. Please help me to find the mistake. My submission: https://codeforces.com/contest/1520/submission/115269582