Compilare: user.cpp: In function ‘int main()’: user.cpp:21:17: warning: unused variable ‘solx’ [-Wunused-variable] int i,j,N,M,solx,soly,tmin=INF,x,y,z,inc,sf; ^ user.cpp:21:22: warning: unused variable ‘soly’ [-Wunused-variable] int i,j,N,M,solx,soly,tmin=INF,x,y,z,inc,sf; ^ user.cpp:18:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rj.in","r",stdin); ^ user.cpp:19:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rj.out","w",stdout); ^ user.cpp:24:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&N,&M); ^ user.cpp:25:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&go); ^ user.cpp:28:39: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets( a[i] + 1, NMax - 1, stdin ); ^ user.cpp:43:19: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] deja[x][y] = 1; ^ user.cpp:43:19: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized]