delete pics to save space

1.2068.cpp

@@ -0,0 +1,27 @@
+#include<cstdio>
+const int maxn=100005;
+int n,m,c[maxn];
+void Add(int p,int v)
+{
+	for(;p<=n;p+=(p&-p)) c[p]+=v;
+}
+int Sum(int p)
+{
+	int res=0;
+	for(;p;p-=(p&-p)) res+=c[p];
+	return res;
+}
+int main()
+{
+	#ifdef local
+	freopen("pro.in","r",stdin);
+	#endif
+	scanf("%d%d",&n,&m);
+	while(m-->0)
+	{
+		char op[2]; int a,b; scanf("%s%d%d",op,&a,&b);
+		if(op[0]=='x') Add(a,b);
+		else printf("%d\n",Sum(b)-Sum(a-1));
+	}
+	return 0;
+}