Compilare: main.cpp: In function 'int gen(int, int, int)': main.cpp:20:30: warning: unused variable 's' [-Wunused-variable] int lin,col,hmin=v[i][j],s,dist; ^ main.cpp:20:32: warning: unused variable 'dist' [-Wunused-variable] int lin,col,hmin=v[i][j],s,dist; ^~~~ main.cpp: In function 'int main()': main.cpp:58:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("bila.in","r",stdin); ^ main.cpp:59:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("bila.out","w",stdout); ^ main.cpp:61:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ main.cpp:65:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i][j]); ^ main.cpp: In function 'int gen(int, int, int)': main.cpp:44:20: warning: 'col' may be used uninitialized in this function [-Wmaybe-uninitialized] x[i][j]=gen(++nr,lin,col)+1; ~~~^~~~~~~~~~~~~~ main.cpp:44:20: warning: 'lin' may be used uninitialized in this function [-Wmaybe-uninitialized]