delete pics to save space

1.3952.cpp

@@ -0,0 +1,89 @@
+#include<cstdio>
+#include<cctype>
+#include<cstring>
+#include<stack>
+#include<algorithm>
+using namespace std;
+int T;
+int line;
+char buf[100],s[100];
+int iex,ex;
+bool hsh[128];
+inline int GetNum(char *s)
+{
+    int len=strlen(s),res=0;
+    for(int i=0;i<len;i++) res=res*10+s[i]-'0';
+    return res;
+}
+void solve()
+{
+    memset(hsh,0,sizeof(hsh));
+    stack<char> stk;
+    stack<int> add;
+    stack<bool> can;
+    int depth=0; ex=0;
+    bool err=false;
+    for(int i=0;i<line;i++)
+    {
+        char ch;
+        fgets(buf,100,stdin); ch=buf[0];
+        if(err) continue;
+        if(ch=='F')
+        {
+            char name;
+            sscanf(buf,"F %c",&name);
+            if(hsh[name]) { err=true; goto end; }
+            hsh[name]=true;
+            stk.push(name);
+            char x[10],y[10];
+            sscanf(buf,"F %*c %s %s",x,y);
+            bool flag;
+            if(x[0]=='n') { add.push(0); flag=(y[0]=='n'); }
+            else
+            {
+                if(y[0]=='n') { add.push(1); depth++; flag=true; }
+                else
+                {
+                    add.push(0);
+                    int nx=GetNum(x),ny=GetNum(y);
+                    if(ny-nx+1>=1) flag=true;
+                    else flag=false;
+                }
+            }
+            if(flag&&(can.empty()||can.top())) can.push(true);
+            else can.push(false);
+        }
+        else
+        {
+            if(stk.empty()) { err=true; goto end; }
+            hsh[stk.top()]=false;
+            if(can.top()) ex=max(ex,depth);
+            depth-=add.top();
+            stk.pop();
+            add.pop();
+            can.pop();
+        }
+end:	continue;
+    }
+    if(stk.size()) err=true;
+    if(err) printf("ERR\n");
+    else if(ex==iex) printf("Yes\n");
+    else printf("No\n");
+}
+int main()
+{
+#ifdef local
+    freopen("pro.in","r",stdin);
+#endif
+    fgets(buf,100,stdin);
+	sscanf(buf,"%d",&T);
+    while(T-->0)
+    {
+    	fgets(buf,100,stdin);
+		sscanf(buf,"%d O(%s)",&line,s);
+        if(s[0]=='1') iex=0;
+        else sscanf(s,"n^%d",&iex);
+        solve();
+    }
+    return 0;
+}