Keep trying, keep going

CF Time Limit: 1000MS Memory Limit: 65536KB Problem Description LYD loves codeforces since there are many Russian contests. In an contest lasting for T minutes there are n problems, and f

sum of power Time Limit: 1000MS Memory Limit: 65536KB Problem Description Calculate  mod (1000000000+7) for given n，m. Input Input contains two integers n,m(1≤n≤1000,0≤m≤10). Output

quadratic equation Time Limit: 2000MS Memory Limit: 131072KB Problem Description With given integers a,b,c, you are asked to judge whether the following statement is true: "For any x, if a⋅+

Parity check Time Limit: 2000MS Memory Limit: 524288KB Problem Description Fascinated with the computer games, Gabriel even forgets to study. Now she needs to finish her homework, and there i

company Time Limit: 1000MS Memory Limit: 65536KB Problem Description There are n kinds of goods in the company, with each of them has a inventory of  and direct unit benefit . Now you find