Compilare: main.cpp: In function 'int main()': main.cpp:51:11: warning: unused variable 'pas' [-Wunused-variable] int v,pas,g; ^~~ main.cpp:49:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("rover.in","r",stdin); ^ main.cpp:50:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("rover.out","w",stdout); ^ main.cpp:52:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &v, &n); ^ main.cpp:54:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &g); ^ main.cpp:57:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &mat[i][j]); ^