#6050. 「雅礼集训 2017 Day11」TRI
说明
给定 n n n 和 m m m，求出所有顶点坐标满足 0≤x<n,0≤y<m 0="" \leq="" x="" 0≤x<n,0≤y<m</n,0≤y 的格点三角形的面积和的两倍。答案模 1004535809 1004535809 1004535809 输出。
输入格式
一行两个整数 n n n 和 m m m。
输出格式
一行一个整数表示答案。
样例
2 324提示
| 测试点 | n n n | m m m |
|---|---|---|
| 1 | ≤10 \leq 10 ≤10 | ≤10 \leq 10 ≤10 |
| 2 | ≤20 \leq 20 ≤20 | ≤20 \leq 20 ≤20 |
| 3 | ≤30 \leq 30 ≤30 | ≤30 \leq 30 ≤30 |
| 4 | ≤40 \leq 40 ≤40 | ≤40 \leq 40 ≤40 |
| 5 | ≤50 \leq 50 ≤50 | ≤50 \leq 50 ≤50 |
| 6 | ≤60 \leq 60 ≤60 | ≤60 \leq 60 ≤60 |
| 7 | ≤100 \leq 100 ≤100 | ≤100 \leq 100 ≤100 |
| 8 | ≤200 \leq 200 ≤200 | ≤200 \leq 200 ≤200 |
| 9 | ≤300 \leq 300 ≤300 | ≤300 \leq 300 ≤300 |
| 10 | ≤400 \leq 400 ≤400 | ≤400 \leq 400 ≤400 |
| 11 | ≤1000 \leq 1000 ≤1000 | ≤1000 \leq 1000 ≤1000 |
| 12 | ≤2000 \leq 2000 ≤2000 | ≤2000 \leq 2000 ≤2000 |
| 13 | ≤2500 \leq 2500 ≤2500 | ≤2500 \leq 2500 ≤2500 |
| 14 | ≤3000 \leq 3000 ≤3000 | ≤3000 \leq 3000 ≤3000 |
| 15 | ≤1000 \leq 1000 ≤1000 | ≤109 \leq 10 ^ 9 ≤109 |
| 16 | ≤1500 \leq 1500 ≤1500 | ≤109 \leq 10 ^ 9 ≤109 |
| 17 | ≤2000 \leq 2000 ≤2000 | ≤109 \leq 10 ^ 9 ≤109 |
| 18 | ≤2500 \leq 2500 ≤2500 | ≤109 \leq 10 ^ 9 ≤109 |
| 19 | ≤2800 \leq 2800 ≤2800 | ≤109 \leq 10 ^ 9 ≤109 |
| 20 | ≤3000 \leq 3000 ≤3000 | ≤109 \leq 10 ^ 9 ≤109 |