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history_source/挑战程序设计竞赛/2.3.3.1.cpp

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+#include<cstdio>
+int n,m,M;
+int dp[1005][1005];
+void solve()
+{
+	int i,j;
+	dp[0][0]=1;
+	for(i=1;i<=m;i++)
+		for(j=0;j<=n;j++)
+		if(j-i>=0)
+			dp[i][j]=(dp[i-1][j]+dp[i][j-i])%M;
+		else
+			dp[i][j]=dp[i-1][j];
+	printf("%d\n",dp[m][n]);
+	for(i=0;i<=m;i++)
+		for(j=0;j<=n;j++)
+			printf("dp[%d][%d]=%d\n",i,j,dp[i][j]);
+}
+void init()
+{
+	scanf("%d%d%d",&n,&m,&M);
+}
+int main()
+{
+	init();
+	solve();
+	return 0;
+}