delete pics to save space

2.11491.cpp

@@ -0,0 +1,53 @@
+#include<cstdio>
+#include<cstring>
+#include<algorithm>
+using namespace std;
+const int maxn=100005;
+char v[maxn];
+int l[maxn],r[maxn];
+int n,d;
+void solve()
+{
+	scanf("%s",v+1);
+	l[0]=0;r[0]=1;
+	for(int i=1;i<=n;i++)
+	{
+		l[i]=i-1;
+		r[i]=i+1;
+	}
+	int p=1,t=n;
+	while(d>0&&p!=t)
+	{
+		p=r[p];
+		while(d>0&&l[p]!=0&&v[l[p]]<v[p])
+		{
+			r[l[l[p]]]=p;
+			l[p]=l[l[p]];
+			n--;
+			d--;
+		}
+	}
+	p=r[0];
+	for(int i=0;i<n-d;i++)
+	{
+		putchar(v[p]);
+		p=r[p];
+	}
+	printf("\n");
+}
+int main()
+{
+#ifdef local
+//	freopen("pro.in","r",stdin);
+#endif
+	while(scanf("%d%d",&n,&d)==2&&n&&d)
+	{
+		solve();
+	}
+	return 0;
+}
+/*
+7 3
+3333114
+3334
+*/