import java.io.*; import java.util.NoSuchElementException; public class Main_yukicoder865 { private static Scanner sc; private static Printer pr; private static void solve() { int n = sc.nextInt(); int[] a = sc.nextIntArray(n); int q = sc.nextInt(); int[][] tv = sc.nextIntArrays(q, 2); int[] aa = new int[n - 24 + 1]; for (int i = 0; i < 24; i++) { aa[0] += a[i]; } int max = aa[0]; for (int i = 1; i + 23 < n; i++) { aa[i] = aa[i - 1] - a[i - 1] + a[i + 23]; max = Math.max(max, aa[i]); } for (int i = 0; i < q; i++) { int t = tv[0][i] - 1; int v = tv[1][i]; int d = v - a[t]; a[t] = v; for (int j = Math.max(0, t - 23); j <= Math.min(n - 24, t); j++) { aa[j] += d; max = Math.max(max, aa[j]); } pr.println(max); } } // --------------------------------------------------- public static void main(String[] args) { sc = new Scanner(System.in); pr = new Printer(System.out); solve(); pr.close(); sc.close(); } static class Scanner { BufferedReader br; Scanner (InputStream in) { br = new BufferedReader(new InputStreamReader(in)); } private boolean isPrintable(int ch) { return ch >= '!' && ch <= '~'; } private boolean isCRLF(int ch) { return ch == '\n' || ch == '\r' || ch == -1; } private int nextPrintable() { try { int ch; while (!isPrintable(ch = br.read())) { if (ch == -1) { throw new NoSuchElementException(); } } return ch; } catch (IOException e) { throw new NoSuchElementException(); } } String next() { try { int ch = nextPrintable(); StringBuilder sb = new StringBuilder(); do { sb.appendCodePoint(ch); } while (isPrintable(ch = br.read())); return sb.toString(); } catch (IOException e) { throw new NoSuchElementException(); } } int nextInt() { try { // parseInt from Integer.parseInt() boolean negative = false; int res = 0; int limit = -Integer.MAX_VALUE; int radix = 10; int fc = nextPrintable(); if (fc < '0') { if (fc == '-') { negative = true; limit = Integer.MIN_VALUE; } else if (fc != '+') { throw new NumberFormatException(); } fc = br.read(); } int multmin = limit / radix; int ch = fc; do { int digit = ch - '0'; if (digit < 0 || digit >= radix) { throw new NumberFormatException(); } if (res < multmin) { throw new NumberFormatException(); } res *= radix; if (res < limit + digit) { throw new NumberFormatException(); } res -= digit; } while (isPrintable(ch = br.read())); return negative ? res : -res; } catch (IOException e) { throw new NoSuchElementException(); } } long nextLong() { try { // parseLong from Long.parseLong() boolean negative = false; long res = 0; long limit = -Long.MAX_VALUE; int radix = 10; int fc = nextPrintable(); if (fc < '0') { if (fc == '-') { negative = true; limit = Long.MIN_VALUE; } else if (fc != '+') { throw new NumberFormatException(); } fc = br.read(); } long multmin = limit / radix; int ch = fc; do { int digit = ch - '0'; if (digit < 0 || digit >= radix) { throw new NumberFormatException(); } if (res < multmin) { throw new NumberFormatException(); } res *= radix; if (res < limit + digit) { throw new NumberFormatException(); } res -= digit; } while (isPrintable(ch = br.read())); return negative ? res : -res; } catch (IOException e) { throw new NoSuchElementException(); } } float nextFloat() { return Float.parseFloat(next()); } double nextDouble() { return Double.parseDouble(next()); } String nextLine() { try { int ch; while (isCRLF(ch = br.read())) { if (ch == -1) { throw new NoSuchElementException(); } } StringBuilder sb = new StringBuilder(); do { sb.appendCodePoint(ch); } while (!isCRLF(ch = br.read())); return sb.toString(); } catch (IOException e) { throw new NoSuchElementException(); } } int[] nextIntArray(int n) { int[] ret = new int[n]; for (int i = 0; i < n; i++) { ret[i] = sc.nextInt(); } return ret; } int[][] nextIntArrays(int n, int m) { int[][] ret = new int[m][n]; for (int i = 0; i < n; i++) { for (int j = 0; j < m; j++) { ret[j][i] = sc.nextInt(); } } return ret; } void close() { try { br.close(); } catch (IOException e) { // throw new NoSuchElementException(); } } } static class Printer extends PrintWriter { Printer(OutputStream out) { super(out); } void printInts(int... a) { StringBuilder sb = new StringBuilder(32); for (int i = 0, size = a.length; i < size; i++) { if (i > 0) { sb.append(' '); } sb.append(a[i]); } println(sb); } void printLongs(long... a) { StringBuilder sb = new StringBuilder(64); for (int i = 0, size = a.length; i < size; i++) { if (i > 0) { sb.append(' '); } sb.append(a[i]); } println(sb); } void printStrings(String... a) { StringBuilder sb = new StringBuilder(32); for (int i = 0, size = a.length; i < size; i++) { if (i > 0) { sb.append(' '); } sb.append(a[i]); } println(sb); } } }