HDU - 1200 To and Fro

题意：给定一个，其实是由一个图按蛇形输出而成的字符串，要求按从左到右，从上到下的顺序输出这个图。

分析：

1、把字符串转化成图

2、按要求输出图= =

#include<cstdio>
#include<cstring>
#include<cstdlib>
#include<cctype>
#include<cmath>
#include<iostream>
#include<sstream>
#include<iterator>
#include<algorithm>
#include<string>
#include<vector>
#include<set>
#include<map>
#include<stack>
#include<deque>
#include<queue>
#include<list>
#define lowbit(x) (x & (-x))
const double eps = 1e-8;
inline int dcmp(double a, double b){
    if(fabs(a - b) < eps) return 0;
    return a > b ? 1 : -1;
}
typedef long long LL;
typedef unsigned long long ULL;
const int INT_INF = 0x3f3f3f3f;
const int INT_M_INF = 0x7f7f7f7f;
const LL LL_INF = 0x3f3f3f3f3f3f3f3f;
const LL LL_M_INF = 0x7f7f7f7f7f7f7f7f;
const int dr[] = {0, 0, -1, 1, -1, -1, 1, 1};
const int dc[] = {-1, 1, 0, 0, -1, 1, -1, 1};
const int MOD = 1e9 + 7;
const double pi = acos(-1.0);
const int MAXN = 200 + 10;
const int MAXT = 10000 + 10;
using namespace std;
char s[MAXN];
char pic[MAXN][MAXN];
int main(){
    int c;
    while(scanf("%d", &c) == 1){
        if(!c) return 0;
        memset(pic, ' ', sizeof pic);
        scanf("%s", s);
        int len = strlen(s);
        int r = 0;
        for(int i = 0; i < len; ++i){
            if(i % c == 0) ++r;
            if(r & 1){
                pic[r][i - (r - 1) * c] = s[i];
            }
            else{
                pic[r][c - (i - (r - 1) * c) - 1] = s[i];
            }
        }
        for(int i = 0; i < c; ++i){
            for(int j = 1; j <= r; ++j){
                printf("%c", pic[j][i]);
            }
        }
        printf("\n");
    }
    return 0;
}