#include using namespace std; int32_t main() { int n,m; cin >> n >> m; bool ans=false; vector a(n); while(m--){ vector cumsum(n+1); for(int i=0;i> ai; a[i]+=ai; cumsum[i+1]=cumsum[i]+a[i]; //cerr << "cumsum[" << i << "]:" << cumsum[i] << endl; } //cerr << "cumsum[" << cumsum.size()-1 << "]:" << cumsum[cumsum.size()-1] << endl; int endidx=lower_bound(cumsum.begin(),cumsum.end(),777)-cumsum.begin(); //cerr << "endidx:" << endidx << endl; bool b=false; for(int j=0;j