#include #include using namespace std; int comparew(const void* a, const void* b) {return *(int*)a-*(int*)b;} int main(){int i=0,n,m;long long p;cin>>n>>m;int w[n],b[n];for(;i>w[i]>>b[i]; qsort(w,n,sizeof(int),comparew);p=0;i=0;while(i