PE-1 & 暴模|容斥
题意:
求1000以下3或5的倍数之和.
SOL:
暴模也是兹瓷的啊...
那么就想到了初赛悲催的滚粗...容斥忘了加上多减的数了...
然后对着题...T = 3*333*(1+333)/2 + 5*199*(1+199)/2 - 15*66*(1+66)/2 = 233168
Sometimes it s the very people who no one imagines anything of. who do the things that no one can imagine.