Description One of the more popular activities in San Antonio is to enjoy margaritas in the park along the river know as the River Walk. Margaritas may be purchased at many establishments along the River Walk from fancy hotels to Joe’s Taco and Marga…

题目 Description One of the more popular activities in San Antonio is to enjoy margaritas in the park along the river know as the River Walk. Margaritas may be purchased at many establishments along the River Walk from fancy hotels toJoe’s Taco and Mar…

题意 n个有体积的物品,问选取一些物品,且不能再继续选有多少方法? n<=1000 题解 以前的考试题.当时是A了,但发现是数据水,POJ上WA了. 把体积从小到大排序枚举没选的物品中体积最小的. 假设枚举到i,那么1到i-1一定都选.可选的空间为[m-sum[i-1]+1,m] 然后对于后面的数跑DP的到f[i][j]前i个数空间恰好为j时的方案: 贡献为可选空间的方案. 一个优化是倒着枚举i,这样在求f[i][j]时所花费的时间会大大减少. #include<iostream> #i…

Description One of the more popular activities in San Antonio is to enjoy margaritas in the park along the river know as the River Walk. Margaritas may be purchased at many establishments along the River Walk from fancy hotels to Joe's Taco and Marga…

各种杂题,水题,模拟,包括简单数论. 1001 A+B 1002 A+B+C 1009 Fat Cat 1010 The Angle 1011 Unix ls 1012 Decoding Task 1019 Grandpa's Other Estate 1034 Simple Arithmetics 1036 Complete the sequence! 1043 Maya Calendar 1054 Game Prediction 1057 Mileage Bank 1067 Rails 10…

Crossing River Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 9585 Accepted: 3622 Description A group of N people wishes to go across a river with only one boat, which can at most carry two persons. Therefore some sort of shuttle arrangem…

Description Every year the cows hold an event featuring a peculiar version of hopscotch that involves carefully jumping from rock to rock in a river. The excitement takes place on a long, straight river with a rock at the start and another rock at th…

Crossing River Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 9887   Accepted: 3737 Description A group of N people wishes to go across a river with only one boat, which can at most carry two persons. Therefore some sort of shuttle arra…

题目传送门 /* 二分:搜索距离,判断时距离小于d的石头拿掉 */ #include <cstdio> #include <algorithm> #include <cstring> #include <cmath> using namespace std; typedef long long ll; ; const int INF = 0x3f3f3f3f; ll a[MAXN]; int n, m; bool check(ll d) { ; ; ; i&…

E - River Hopscotch POJ - 3258 Every year the cows hold an event featuring a peculiar version of hopscotch that involves carefully jumping from rock to rock in a river. The excitement takes place on a long, straight river with a rock at the start and…