https://codeforces.com/contest/1536/problem/C시간 2초, 메모리 256MBinput :t (1≤t≤1000)n (1≤n≤5⋅10^5)s ('D', 'K'로 이루어진 문자열)output : For each test case,
https://codeforces.com/contest/1536/problem/B시간 2초, 메모리 256MBinput :t (1≤t≤1000)n (1≤n≤1000)output : For each test case, output the MEX of the st
https://codeforces.com/contest/1536/problem/A시간 2초, 메모리 256MBinput :t (1≤t≤50)n (2≤n≤100)a1,a2,⋯,an (−100≤ai≤100)output : For each test case, o