#include #define ALL(v) std::begin(v),std::end(v) using lint=long long; using ld=long double; templateusing numr=std::numeric_limits; int main(){ std::cin.tie(nullptr);std::ios_base::sync_with_stdio(false); std::cout.setf(std::ios_base::fixed);std::cout.precision(15); lint n,m;std::cin>>n>>m; std::string s(m+1,'$'); std::vector>events(n+1); for(lint i=0;i>l>>r;l--; std::cin>>s.at(i); events.at(l).push_back(i+1); events.at(r).push_back(-i-1); } events.at(0).push_back(m+1); events.at(n).push_back(-m-1); std::setset; lint y=0,k=0,c=0,z=0; for(lint i=0;i