Compilare: user.cpp: In function ‘void patterns_pas()’: user.cpp:61:9: warning: unused variable ‘i’ [-Wunused-variable] int i, j; ^ user.cpp:61:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp: In function ‘int main()’: user.cpp:297:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cclj.in", "r", stdin); ^ user.cpp:298:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cclj.out", "w", stdout); ^ user.cpp:300:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ user.cpp:303:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp: In function ‘void solve(int, int)’: user.cpp:181:9: warning: ‘i’ may be used uninitialized in this function [-Wmaybe-uninitialized] int i, j, lst = 0; ^