French authorities have expressed relief after recent protests over rising living costs resulted in less violence than previous weekends. High schools at the heart of the movement reopen Monday after their autumn break. Germany faced challenges after nationwide protests Saturday ended with rioters attacking police and looting stores in some cities. Around Europe, hundreds of thousands held marches Saturday inspired by young people that were overwhelmingly peaceful despite scattered unrest. In Paris, rioters targeted police with Molotov cocktails at the end of Saturday’s march on the city’s eastern edge, injuring three officers and setting a car ablaze.