import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.lang.reflect.Array;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.NoSuchElementException;
import java.util.Objects;
import java.util.Queue;
import java.util.Random;
import java.util.function.IntBinaryOperator;
import java.util.function.IntFunction;
import java.util.function.IntToDoubleFunction;
import java.util.function.IntToLongFunction;
import java.util.function.IntUnaryOperator;
import java.util.function.LongBinaryOperator;
import java.util.function.Predicate;
import java.util.function.ToIntFunction;
import java.util.random.RandomGenerator;
import java.util.stream.IntStream;
import java.util.stream.Stream;

public class Main {
    static MyPrintWriter pw = MyPrintWriter.getInstance();

    static FastScanner sc = FastScanner.getInstance();

    public static void main(String[] args) throws IOException {
        Thread.setDefaultUncaughtExceptionHandler((t, e) -> System.exit(1));
        new Main().run();
        pw.flush();
    }

    void run() {
        int N = sc.nextInt();
        int Q = sc.nextInt();
        int[] S = sc.nextInts(N);
        var ds = new StaticPointAddRangeSum1D(S);
        for (int QUERY = 0; QUERY < Q; QUERY++) {
            int L = sc.nextInt() - 1;
            int R = sc.nextInt();
            int K = sc.nextInt();
            long ans = ds.getRangeSum(L, R);
            pw.println(ans);
        }
    }
}

class ArrayUtils {
    /**
     * b[i] = a[1] + a[2] + .. + a[i]
     *
     * @param a
     * @return  */
    public static long[] prefixSum(long[] a) {
        long[] b = new long[a.length];
        for (int i = 0; i < b.length; ++i) {
            b[i] = (i == 0 ? 0 : b[i - 1]) + a[i];
        }
        return b;
    }
}

class FastScanner {
    private static FastScanner instance = null;

    private final InputStream in = System.in;

    private final byte[] buffer = new byte[1 << 16];

    private int ptr = 0;

    private int buflen = 0;

    private FastScanner() {
    }

    public static FastScanner getInstance() {
        if (instance == null) {
            instance = new FastScanner();
        }
        return instance;
    }

    private boolean hasNextByte() {
        if (ptr < buflen) {
            return true;
        }
        ptr = 0;
        try {
            buflen = in.read(buffer);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return buflen > 0;
    }

    private int readByte() {
        if (hasNextByte()) {
            return buffer[ptr++];
        } else {
            return -1;
        }
    }

    private boolean isPrintableChar(int c) {
        return (33 <= c) && (c <= 126);
    }

    public boolean hasNext() {
        while (hasNextByte() && (!isPrintableChar(buffer[ptr]))) {
            ptr++;
        } 
        return hasNextByte();
    }

    public long nextLong() {
        if (!hasNext()) {
            throw new NoSuchElementException();
        }
        long n = 0;
        boolean minus = false;
        int b = readByte();
        if (b == '-') {
            minus = true;
            b = readByte();
        }
        while ((b >= '0') && (b <= '9')) {
            // n = n * 10 + (b - '0');
            n = ((n << 1) + (n << 3)) + (b - '0');
            b = readByte();
        } 
        return minus ? -n : n;
    }

    public int nextInt() {
        return ((int) (nextLong()));
    }

    public int[] nextInts(int n) {
        int[] a = new int[n];
        for (int i = 0; i < n; ++i) {
            a[i] = nextInt();
        }
        return a;
    }
}

class MyPrintWriter extends PrintWriter {
    private static MyPrintWriter instance = null;

    private MyPrintWriter() {
        super(System.out);
    }

    public static MyPrintWriter getInstance() {
        if (instance == null) {
            instance = new MyPrintWriter();
        }
        return instance;
    }
}

class StaticPointAddRangeSum1D {
    int N;

    long[] A;

    boolean isBuilt = false;

    /**
     * 座標iにa[i]を足して初期化する
     *
     * @param N
     */
    public StaticPointAddRangeSum1D(int[] a) {
        this.N = a.length;
        A = new long[N];
        for (int i = 0; i < A.length; i++) {
            add(i, a[i]);
        }
    }

    public void add(int i, long val) {
        A[i] += val;
    }

    void build() {
        if (isBuilt) {
            throw new AssertionError();
        }
        A = ArrayUtils.prefixSum(A);
        isBuilt = true;
    }

    /**
     * verified:https://atcoder.jp/contests/abc347/submissions/71277574
     */
    public long getRangeSum(int leftInclusive, int rightExclusive) {
        if (!isBuilt) {
            build();
        }
        leftInclusive = Math.max(leftInclusive, 0);
        rightExclusive = Math.min(rightExclusive, A.length);
        if (rightExclusive <= leftInclusive) {
            return 0;
        }
        return A[rightExclusive - 1] - (leftInclusive == 0 ? 0 : A[leftInclusive - 1]);
    }
}


// --- Original Code ---
// 
// 
// import java.io.IOException;
// import java.util.ArrayList;
// import java.util.Arrays;
// 
// import library.tools.FastScanner;
// import library.tools.MergeFiles;
// import library.tools.MyPrintWriter;
// import library.util.ArrayUtils;
// import library.util.Fp;
// import library.util.collections.LongArrayList;
// import library.util.fold.StaticPointAddRangeSum1D;
// import library.util.graph.ImplicitDigraph;
// 
// public class Main {
// 	static MyPrintWriter pw = MyPrintWriter.getInstance();
// 	static FastScanner sc = FastScanner.getInstance();
// 
// 	public static void main(String[] args) throws IOException {
// 		new Main().run();
// 		pw.flush();
// 		MergeFiles.export();
// 	}
// 	
// 
// 	void run() {
// 		int N=sc.nextInt();
// 		int Q=sc.nextInt();
// 		int[]S=sc.nextInts(N);
// 		var ds=new StaticPointAddRangeSum1D(S);
// 		for (int QUERY = 0; QUERY < Q; QUERY++) {
// 			int L=sc.nextInt()-1;
// 			int R=sc.nextInt();
// 			int K=sc.nextInt();
// 			long ans=ds.getRangeSum(L, R);
// 			pw.println(ans);
// 		}
// 	}
//     
// 	void tr(Object... objects) {
// 		System.out.println(Arrays.deepToString(objects));
// 	}
// }
//