题目链接 题目大意:给你n个物品,第iii个物品价值aia_iai,询问q次,问你能不能凑出价值为qiq_iqi的物品. 小贪心吧.从大到小找,能拿就拿就行了. #include<bits/stdc++.h> #define LL long long #define fi first #define se second #define mp make_pair #define pb push_back using namespace std; LL gcd(LL a,LL b){retur…
Codeforces Round #297 (Div. 2)C. Ilya and Sticks Time Limit: 2 Sec Memory Limit: 256 MBSubmit: xxx Solved: 2xx 题目连接 http://codeforces.com/contest/525/problem/C Description In the evening, after the contest Ilya was bored, and he really felt like ma…
E. Anton and Ira Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/584/problem/E Description Anton loves transforming one permutation into another one by swapping elements for money, and Ira doesn't like paying for stupid game…
B. Anton and Lines The teacher gave Anton a large geometry homework, but he didn't do it (as usual) as he participated in a regular round on Codeforces. In the task he was given a set of n lines defined by the equations y = ki·x + bi. It was necess…
地址:http://codeforces.com/problemset/problem/712/C 题目: C. Memory and De-Evolution time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Memory is now interested in the de-evolution of objects, sp…
题目链接:http://codeforces.com/problemset/problem/731/C 题意:有n只袜子,每只都有一个颜色,现在他的妈妈要去出差m天,然后让他每天穿第 L 和第 R 只袜子,他为了让每天穿的袜子都是一个颜色的,他需要把袜子涂色,共有k种颜色,求最少需要涂多少只袜子,才能保证他每天穿的袜子都是一样的. 用并查集把所有联系在一起的袜子放到一个集合中去,然后这些袜子会变成一块一块的,我们在每一块中找一种颜色最多的,然后把当前块中的其他袜子都涂成这种颜色即可,累加即可 #…
A. Vitya in the Countryside time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Every summer Vitya comes to visit his grandmother in the countryside. This summer, he got a huge wart. Every gran…
D. Finals in arithmetic 题目连接: http://www.codeforces.com/contest/625/problem/D Description Vitya is studying in the third grade. During the last math lesson all the pupils wrote on arithmetic quiz. Vitya is a clever boy, so he managed to finish all th…
B. Vika and Squares 题目连接: http://www.codeforces.com/contest/610/problem/B Description Vika has n jars with paints of distinct colors. All the jars are numbered from 1 to n and the i-th jar contains ai liters of paint of color i. Vika also has an infi…
C. GukiZ hates Boxes Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/551/problem/C Description Professor GukiZ is concerned about making his way to school, because massive piles of boxes are blocking his way. In total there…
C. Vanya and Exams Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/492/problem/C Description Vanya wants to pass n exams and get the academic scholarship. He will get the scholarship if the average grade mark for all the ex…
C. Wilbur and Points Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/596/problem/C Description Wilbur is playing with a set of n points on the coordinate plane. All points have non-negative integer coordinates. Moreover, if…
A. Warrior and Archer Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/594/problem/A Description In the official contest this problem has a different statement, for which jury's solution was working incorrectly, and for this…
B. OR in Matrix Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/486/problem/B Description Let's define logical OR as an operation on two logical values (i. e. values that belong to the set {0, 1}) that is equal to 1 if eith…
C. Marina and Vasya Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/584/problem/C Description Marina loves strings of the same length and Vasya loves when there is a third string, different from them in exactly t characters.…
B. Ilya and Queries time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Ilya the Lion wants to help all his friends with passing exams. They need to solve the following problem to pass the IT…
D. Lakes in Berland 题目连接: http://codeforces.com/contest/723/problem/D Description The map of Berland is a rectangle of the size n × m, which consists of cells of size 1 × 1. Each cell is either land or water. The map is surrounded by the ocean. Lakes…
D. Maxim and Array 题目连接: http://codeforces.com/contest/721/problem/D Description Recently Maxim has found an array of n integers, needed by no one. He immediately come up with idea of changing it: he invented positive integer x and decided to add or…
C. Sonya and Queries 题目连接: http://codeforces.com/contest/714/problem/C Description Today Sonya learned about long integers and invited all her friends to share the fun. Sonya has an initially empty multiset with integers. Friends give her t queries,…
C. Tanya and Toys 题目连接: http://www.codeforces.com/contest/659/problem/C Description In Berland recently a new collection of toys went on sale. This collection consists of 109 types of toys, numbered with integers from 1 to 109. A toy from the new col…
B. School Marks Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/540/problem/B Description Little Vova studies programming in an elite school. Vova and his classmates are supposed to write n progress tests, for each test the…
题目链接:http://codeforces.com/problemset/problem/721/D D. Maxim and Array time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Recently Maxim has found an array of n integers, needed by no one. He…
