CodeForces Educational Codeforces Round 4
A. The Text Splitting
$p$ の個数を全探索すればよいです.
B. HDD is Outdated Technology
$x$ の書かれている場所を求めておけばよい...
CodeForces
CodeForces
CodeForces
CodeForces
CodeForces
CodeForces
CodeForces
CodeForces
CodeForces
CodeForces