Compilare: user.cpp: In function ‘int main()’: user.cpp:72:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (register int i = 0; i < ops[timp].size(); ++i) ^ user.cpp:81:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] { ^ user.cpp:119:16: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (a[xs][ys] == 5) ^ user.cpp:28:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("culegere.in", "r", stdin); ^ user.cpp:29:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("culegere.out", "w", stdout); ^ user.cpp:36:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &n, &m, &k, &e); ^ user.cpp:39:54: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d %d", &t, &x, &y, &st, &dr); ^ user.cpp:45:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &dir); ^