Compilare: user.cpp: In function ‘int main()’: user.cpp:44:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("barbar.in", "r", stdin); ^ user.cpp:45:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("barbar.out", "w", stdout); ^ user.cpp:46:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:48:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", h[i]+1); ^ user.cpp:87:17: warning: ‘yF’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(dp[xF][yF] != 1e9){ ^ user.cpp:87:17: warning: ‘xF’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:86:15: warning: ‘yS’ may be used uninitialized in this function [-Wmaybe-uninitialized] go(xS, yS); ^ user.cpp:86:15: warning: ‘xS’ may be used uninitialized in this function [-Wmaybe-uninitialized]