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import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Scanner;




public class sia {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		long numOfAcres = Long.parseLong(scanner.next());
		long numOfHarvests = Long.parseLong(scanner.next());
		List<Long> growth = new ArrayList<Long>();
		for(long i = 0; i < numOfAcres; i++){
			growth.add(Long.parseLong(scanner.next()));
		}
		Map<Long, Long> harvests = new HashMap<>();
		for(long i = 0; i < numOfHarvests; i++){
			harvests.put(Long.parseLong(scanner.next()), Long.parseLong(scanner.next()));
		}
		List<Long> result = countTotalWeight(growth, harvests);
		for (Long long1 : result) {
			System.out.println(long1);
		}
		scanner.close();
	}

	static List<Long> countTotalWeight(List<Long> growth, Map<Long, Long> harvests) {
		List<Long> field = new ArrayList<Long>();
		for (int i = 0; i < growth.size(); i++) {
			field.add(0l);
		}
		List<Long> results = new ArrayList<Long>();
		long harvestCount = harvests.size();
		long counter = 0l;
		long i = 0;
		while(counter!=harvestCount){
			if(null != harvests.get(i)){
				long gathered = harvest(field, harvests.get(i));
				results.add(gathered);
				counter++;
			}
		i++;
		grow(field, growth);
		}		
		return results;
	}

	private static long harvest(List<Long> field, Long cutSize) {
		long result = 0;
		for (int i = 0; i < field.size(); i++) {
			
			if(field.get(i) > cutSize){
				long cut = field.get(i)-cutSize;
				field.set(i, field.get(i)-cut);
				result+=cut;
			}
		}
		return result;		
	}

	private static void grow(List<Long> field, List<Long> growth) {
		for (int i = 0; i < field.size(); i++) {
			field.set(i, field.get(i)+growth.get(i));
		}
		
	}

	
}