zoj 2164 Hanafuda Shuffle

wa了好多次没、一直找不到原因。后来就在网上搜测试数据，得出一个结论，放弃google吧，zf对google太狠了，果断用bing吧http://www.acm-japan.org/past-icpc/domestic2004/index.html测试数据地址。

//2614968 2011-08-04 14:43:52 Accepted 2164 C++ 0 180 ylwh!#include <stdio.h>#include <stdlib.h>int main(){char s[2][55];int n, r, p, c, i, j;bool k, x;while(scanf("%d%d", &n, &r) && n){k = false;x = true;for(i=1, j=n; i<=n; i++, j--)s[0][i] = s[1][i] = j;while(r--){x = !k;scanf("%d%d", &p, &c);for(i = 1, j = p; i <= c; i++, j++)s[x][i] = s[k][j];for(i = c+1, j = 1; j < p; i++, j++)s[x][i] = s[k][j];for(i = p + c; i <= n; i++) // 没有考虑上一次的变动可能改变了底部的数据 s[x][i] = s[k][i]; k = x;}printf("%d\n", s[x][1]);}    return 0;}