更新了许多

小码君的数学算式.cpp

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+#include <algorithm>
+#include <iostream>
+#include <iomanip>
+#include <cstring>
+#include <cstdio>
+#include <stack>
+#include <ctime>
+#include <cmath>
+typedef long long l;
+typedef double d;
+typedef char c;
+using namespace std;
+int main(){
+	c a[100000];
+	l cnt1=0;
+	cin >>a;
+	for(int i=0;i<strlen(a);i++){
+		if(a[i]=='('){
+			cnt1++;
+		}
+		if(a[i]==')'){
+			cnt1--;
+		}
+		if(cnt1<0){
+			cout<<"NO"<<endl;
+			return 0;
+		}
+	}
+		if(cnt1==0){
+			cout<<"YES"<<endl;
+			return 0;
+		}
+		else{
+			cout<<"NO"<<endl;
+			return 0; 
+		}
+	return 0;
+}