poj1029

//============================================================================// Name        : 1029.cpp// Author      : sww// Version     : 1.0// Time       : 2013-11-18 21:04:59//===========================================================================#include <stdio.h>#include <cstring>#define N 1000#define K 100#define P (N/2)using namespace std;bool normal[N + 1];bool heavy[N + 1];bool light[N + 1];bool trying[N + 1];int left[P];int right[P];int n, k, p;char ch;int main() {scanf("%d %d", &n, &k);for (int i = 0; i < k; i++) {scanf("%d", &p);memset(trying, 0, sizeof(trying));for (int j = 0; j < p; j++) {scanf("%d", &left[j]);trying[left[j]] = true;}for (int j = 0; j < p; j++) {scanf("%d", &right[j]);trying[right[j]] = true;}scanf("\n%c", &ch);if (ch == '=') {for (int j = 0; j < p; j++) {normal[left[j]] = true;normal[right[j]] = true;}} else if (ch == '<') {for (int j = 0; j < p; j++) {light[left[j]] = true;heavy[right[j]] = true;}for (int i = 1; i <= n; i++) {if (!trying[i]) {normal[i] = true;}}} else if (ch == '>') {for (int j = 0; j < p; j++) {heavy[left[j]] = true;light[right[j]] = true;}for (int i = 1; i <= n; i++) {if (!trying[i]) {normal[i] = true;}}}}int re = 0;int count = 0;for (int i = 1; i <= n; i++) {if (!(normal[i] || (light[i] && heavy[i]))) {re = i;count++;}}if (count != 1) {puts("0");} else {printf("%d\n", re);}return 0;}