delete pics to save space

history_source/挑战程序设计竞赛/2.7.2.cpp

@@ -0,0 +1,44 @@
+#include<cstdio>
+#include<algorithm>
+using namespace std;
+int n,M[45][45],a[45];
+void init()
+{
+	scanf("%d",&n);
+	int i,j;
+	for(i=0;i<n;i++)
+		for(j=0;j<n;j++)
+			scanf("%d",&M[i][j]);
+}
+void solve()
+{
+	int res=0;
+	for(int i=0;i<n;i++)
+	{
+		a[i]=-1;
+		for(int j=0;j<n;j++)
+			if(M[i][j]==1) a[i]=j;
+	}
+	for(int i=0;i<n;i++)
+	{
+		int pos=-1;
+		for(int j=i;j<n;j++)
+			if(a[j]<=i)
+			{
+				pos=j;
+				break;
+			}
+		for(int j=pos;j>i;j--)
+		{
+			swap(a[j],a[j-1]);
+			res++;
+		}
+	}
+	printf("%d\n",res);
+}
+int main()
+{
+	init();
+	solve();
+	return 0;
+}