Compilare: user.cpp: In function ‘void remove_right(int)’: user.cpp:25:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ((SR[i] >> 24) != pos) SR[++SR[0]] = SR[i]; ^ user.cpp: In function ‘int solve(int)’: user.cpp:36:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (left <= SL[0] && right > 0){ ^ user.cpp:37:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (right && SRval(right) + SL[left] > S) --right; ^ user.cpp:43:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (nextL <= SL[0] && SL[left] == SL[nextL]) ++nextL; ^ user.cpp: In function ‘int main()’: user.cpp:52:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("take5.in", "r", stdin); ^ user.cpp:53:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("take5.out", "w", stdout); ^ user.cpp:55:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &N, &S); ^ user.cpp:56:49: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for (int i = 1; i <= N; ++i) scanf("%d", &A[i]); ^