Compilare: user.cpp: In function ‘void compute_dp(int)’: user.cpp:25:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < List[r].size(); ++ i){ ^ user.cpp: In function ‘int main()’: user.cpp:43:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &T); ^ user.cpp:46:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n", &N, &L); ^ user.cpp:47:22: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(str + 1); ^ /tmp/cceAC9ry.o: In function `main': user.cpp:(.text.startup+0x5f): warning: the `gets' function is dangerous and should not be used.