Compilare: user.cpp: In function ‘int find(int)’: user.cpp:17:10: warning: statement has no effect [-Wunused-value] for(R; R != TT[R] ; R = TT[R]) ; ^ user.cpp: In function ‘int main()’: user.cpp:35:18: warning: unused variable ‘NR’ [-Wunused-variable] int x, y, k, NR = 0; ^ user.cpp:32:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pscnv.in", "r", stdin); ^ user.cpp:33:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pscnv.out", "w", stdout); ^ user.cpp:34:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &n, &m, &a, &b); ^ user.cpp:37:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &x, &y, &k); ^