create dev channel

zeta/py/completed/11659.py

@@ -0,0 +1,13 @@
+import sys
+
+input = sys.stdin.readline
+
+if __name__ == "__main__":
+    N, M = map(int, input().split())
+    A = list(map(int, input().split()))
+    S = [0]
+    for i in range(N):
+        S.append(S[-1] + A[i])
+    for _ in range(M):
+        i, j = map(int, input().split())
+        print(S[j] - S[i - 1])