标签:io os for sp div 2014 on ef size
1 /************************************************************************* 2 > File Name: D.cpp 3 > Author: Stomach_ache 4 > Mail: sudaweitong@gmail.com 5 > Created Time: 2014年10月17日 星期五 21时39分21秒 6 > Propose: 7 ************************************************************************/ 8 #include <cmath> 9 #include <string> 10 #include <cstdio> 11 #include <fstream> 12 #include <cstring> 13 #include <iostream> 14 #include <algorithm> 15 using namespace std; 16 /*Let‘s fight!!!*/ 17 18 const int MOD = 1e9 + 7; 19 const int MAX_N = 200050; 20 int dp[MAX_N]; 21 22 int main(void) { 23 ios_base::sync_with_stdio(false); 24 int r, g; 25 cin >> r >> g; 26 int h = 1; 27 while (h * (h + 1) / 2 <= r + g) h++; 28 h--; 29 30 memset(dp, 0, sizeof(dp)); 31 dp[0] = 1; 32 for (int i = 1; i <= h; i++) { 33 for (int j = r; j >= i; j--) { 34 dp[j] = (dp[j] + dp[j - i]) % MOD; 35 } 36 } 37 h = h * (h + 1) / 2; 38 int res = 0; 39 for (int i = 0; i <= r; i++) if (i + g >= h) res = (res + dp[i]) % MOD; 40 cout << res << endl; 41 42 return 0; 43 }
标签:io os for sp div 2014 on ef size
原文地址:http://www.cnblogs.com/jeemy/p/4042388.html