POJ 3672 Long Distance Racing (模拟)

题意:给定一串字符,u表示是上坡,d表示下坡,f表示平坦的,每个有不同的花费时间,问你从开始走,最远能走到。

析:直接模拟就好了,没什么可说的,就是记下时间时要记双倍的,因为要返回来的。

代码如下:

#include <cstdio>
#include <string>
#include <cstdlib>
#include <cmath>
#include <iostream>
#include <cstring>
#include <set>
#include <queue>
#include <algorithm>
#include <vector>
#include <map>
using namespace std ;

typedef long long LL;
typedef pair<int, int> P;
const int INF = 0x3f3f3f3f;
const double inf = 0x3f3f3f3f3f3f3f;
const double eps = 1e-8;
const int maxn = 1000 + 5;
const int dr[] = {0, 0, -1, 1};
const int dc[] = {-1, 1, 0, 0};
int m, n;
inline bool is_in(int r, int c){
    return r >= 0 && r < n && c >= 0 && c < m;
}

int main(){
    int t, u, f, d;
    while(scanf("%d %d %d %d %d", &m, &t, &u, &f, &d) == 5){
        int ans = 0;
        char s[5];
        LL cnt = 0;
        for(int i = 0; i < t; ++i){
            scanf("%s", s);
            if(s[0] == ‘u‘ || s[0] == ‘d‘)  cnt += u + d;
            else if(s[0] == ‘f‘)  cnt += f + f;
            if(cnt <= m)  ++ans;
        }
        printf("%d\n", ans);
    }
    return 0;
}
时间: 2025-01-05 16:05:36

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