delete pics to save space

history_source/信息学奥赛一本通/2.6.5.cpp

@@ -0,0 +1,22 @@
+#include<cstdio>
+#include<cmath>
+int main()
+{
+	int n,tz,v,t,s=4.5*3600;
+	while(scanf("%d",&n))
+	{
+		if(!n) return 0;
+		int mint=10000;
+		for(int i=1;i<=n;i++)
+		{
+			scanf("%d%d",&v,&t);
+			if(t>=0)
+			{
+				tz=ceil((double)s/v)+t;
+				if(tz<mint) mint=tz;
+			}
+		}
+		printf("%d\n",mint);
+	}
+	return 0;
+}