Implement BFS, DFS, Shortest Path, topological sort and Minimum Spanning Tree (bonus for union-find version).

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European Union and IMF negotiators, tasked with rescuing the Greek economy, flew into Athens this week to find a public-sector stoppage in full swing, with the main union seeking a reversal of all austerity measures.

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But former Wales captain Scott Quinnell, who switched to league at the age of 21 in 1994 before moving back to union, is not expecting Thomas to find the code-change easy.

BBC: Gareth Thomas switches codes in Crusaders move

Periodic salary slowdowns, whether widespread or limited to one player--such as Barry Bonds' failure to find work two years ago--usually have agents and the players' union hinting publicly at collusion.

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Lawmakers are also struggling to find a way to pay for a government-run health insurance program, which union leaders advocate.

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That dreadful prospect may yet be enough to forestall a war and persuade Indian and Pakistan to find better ways to tackle their differences - much as the United States and Soviet Union were forced to do in the aftermath of the 1962 Cuban missile crisis.

BBC: Analysis: South Asia's nuclear brinksmanship

It is getting harder to find good excuses for being offline: this week the European Union allowed airlines to offer in-flight mobile-phone service, and several carriers have Wi-Fi.

ECONOMIST: A wireless world

The African Union-led negotiations also cover other outstanding issues since secession, including the status of citizens of both countries who find themselves living on either side of the world's newest international border.

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Insofar as Germany's leading financial institutions refused to make such loans to the non-creditworthy Soviet Union in the absence of 100 percent government guarantees to cover the transactions, the German government and taxpayers now find themselves the nation holding the bulk of non-performing credit exposure with the former Soviet Union.

CENTERFORSECURITYPOLICY: Center For Security Policy

Even if Germany and the other European Union countries can prevent the immigration population from growing -- and that is a very uncertain if -- they must find ways to deal with integrating the immigrant population already present, both first- and second- generation.

CNN: Germany's Merkel is right -- multiculturalism has failed