2190: [SDOI2008]仪仗队
Description
作为体育委员，C君负责这次运动会仪仗队的训练。仪仗队是由学生组成的N * N的方阵，为了保证队伍在行进中整齐划一，C君会跟在仪仗队的左后方，根据其视线所及的学生人数来判断队伍是否整齐(如下图)。 现在，C君希望你告诉他队伍整齐时能看到的学生人数。
sgu112
27
8月
2015
ab-ba
You are given natural numbers a and b. Find ab-ba.
Input
Input contains numbers a and b (1≤a,b≤100).
sgu105
27
8月
2015
Div 3
There is sequence 1, 12, 123, 1234, ..., 12345678910, ... . Given first N elements of that sequence. You must determine amount of numbers in it that are divisible by 3.
Input
Input contains N (1<=N<=231 - 1).
Output
Write >>继续阅读
sgu104
27
8月
2015
Little shop of flowers
PROBLEM
You want to arrange the window of your flower shop in a most pleasant way. You have F bunches of flowers, each being of a different kind, and at least as many vases ordered in a row. The vases are glued onto >>继续阅读
sgu102
27
8月
2015
Coprimes
For given integer N (1<=N<=104) find amount of positive numbers not greater than N that coprime with N. Let us call two positive integers (say, A and B, for example) coprime if (and only if) their greatest common divisor is 1. >>继续阅读
sgu100
14
8月
2015
A+B
Read integers A and B from input file and write their sum in output file.
Input
Input file contains A and B (0<A,B<10001).