atcoder/abc052B

Author: xirc

atcoder/abc052/B/main.cpp

@@ -0,0 +1,24 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+using ll = long long;
+
+int main() {
+    ios_base::sync_with_stdio(false);
+    cin.tie(0); cout.tie(0);
+
+    int N;
+    string S;
+    cin >> N >> S;
+    
+    int maxx = 0;
+    int x = 0;
+    for (auto ch : S) {
+        if (ch == 'I') ++x;
+        if (ch == 'D') --x;
+        maxx = max(maxx, x);
+    }
+    cout << maxx << endl;
+
+    return 0;
+}