Compilare: user.cpp: In function ‘int main()’: user.cpp:22:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("secventa.in", "r", stdin); ^ user.cpp:23:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n", &N, &K); ^ user.cpp:24:14: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(sir); ^ user.cpp:36:61: warning: ‘ind_SOL’ is used uninitialized in this function [-Wuninitialized] fprintf(fopen("secventa.out", "w"), "%d %d %d", ind_SOL - K + 1, ind_SOL, SOL); ^ /tmp/ccoKNArH.o: In function `main': user.cpp:(.text.startup+0x59): warning: the `gets' function is dangerous and should not be used.