1258. 数字金字塔

http://ybt.ssoier.cn:8088/statusx.php?runidx=15554681

ybt/1258/1258.cpp

@@ -0,0 +1,33 @@
+#include <iostream>
+
+using std::cin;
+using std::cout;
+const char endl = '\n';
+
+const int N = 1005;
+
+int r, g[N][N], f[N][N], ans;
+
+int main() {
+    std::ios::sync_with_stdio(false);
+
+    cin >> r;
+    for (int i = 1; i <= r; i++) {
+        for (int j = 1; j <= i; j++) {
+            cin >> g[i][j];
+        }
+    }
+
+    for (int i = 1; i <= r; i++) {
+        for (int j = 1; j <= i; j++) {
+            f[i][j] = std::max(f[i - 1][j - 1], f[i - 1][j]) + g[i][j];
+        }
+    }
+
+    for (int i = 1; i <= r; i++) {
+        ans = std::max(ans, f[r][i]);
+    }
+    cout << ans << endl;
+
+    return 0;
+}