Compilare: user.cpp: In function ‘int main()’: user.cpp:85:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 2;i <= S;i++){ ^ user.cpp:116:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1;i <= S;i++){ ^ user.cpp:171:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 2;i <= S;i++){ ^ user.cpp:51:15: warning: unused variable ‘k’ [-Wunused-variable] int q,i,j,k; ^ user.cpp:49:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("qnp.in", "r", stdin); ^ user.cpp:50:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("qnp.out", "w", stdout); ^ user.cpp:76:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &q); ^ user.cpp:81:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &cif[i]); ^ user.cpp:84:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%llu", &k); ^ user.cpp:107:13: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(i == 1){ ^