[BOJ] #11660. 구간 합 구하기 5 / 실버1 / 60분 / 실패

Author: Mingguriguri

minjeong/PrefixSum/2024-12-10-[백준]-#11660-구간합구하기5.py

@@ -0,0 +1,33 @@
+import sys
+input = sys.stdin.readline
+
+# 누적합 테이블 계산
+def get_prefix_sum(grid, N):
+    prefix_sum = [[0] * (N+1) for _ in range(N+1)]
+    for i in range(1, N+1):
+        for j in range(1, N+1):
+            prefix_sum[i][j] = (
+                grid[i-1][j-1]
+                + prefix_sum[i-1][j]
+                + prefix_sum[i][j-1]
+                - prefix_sum[i-1][j-1]
+            )
+    return prefix_sum
+
+# 입력
+N, M = map(int, input().split())
+grid = [list(map(int, input().split())) for _ in range(N)]
+
+# 누적합
+prefix_sum = get_prefix_sum(grid, N)
+
+# 범위 합 계산
+for _ in range(M):
+    x1, y1, x2, y2 = map(int, input().split())
+    answer = (
+        prefix_sum[x2][y2]
+        - prefix_sum[x1-1][y2]
+        - prefix_sum[x2][y1-1]
+        + prefix_sum[x1-1][y1-1]
+    )
+    print(answer)