Compilare: main.cpp: In function 'int main()': main.cpp:32:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen( "adlic.in", "r", stdin ); ^ main.cpp:33:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen( "adlic.out", "w", stdout ); ^ main.cpp:37:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf( "%d%d", &q, &n ); ^ main.cpp:40:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf( "%d", &v[i] ); ^ main.cpp:61:20: warning: 'l' may be used uninitialized in this function [-Wmaybe-uninitialized] c[cb(v[i])]=v[i]; ~~~~~~~~~~~^~~~~