Compilare: main.cpp: In function 'int q2(int, int, int)': main.cpp:31:9: warning: variable 'i' set but not used [-Wunused-but-set-variable] int i,j,s,d,val,nr,k,ok,nr0,rez,sol; ^ main.cpp: In function 'int main()': main.cpp:68:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("qvect.in","r",stdin); ^ main.cpp:69:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("qvect.out","w",stdout); ^ main.cpp:71:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&q); ^ main.cpp:74:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i][0]); ^ main.cpp:78:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i][j]); ^ main.cpp:82:37: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d",&cer,&a,&b); ^ main.cpp: In function 'int q2(int, int, int)': main.cpp:31:33: warning: 'rez' may be used uninitialized in this function [-Wmaybe-uninitialized] int i,j,s,d,val,nr,k,ok,nr0,rez,sol; ^~~