Compilare: user.cpp: In function ‘int main()’: user.cpp:24:18: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] cin >> s + 1; ^ user.cpp:20:21: warning: unused variable ‘l’ [-Wunused-variable] int i, j, d, k, l, t, n; ^ user.cpp:16:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("palin3.in", "r", stdin); ^ user.cpp:17:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("palin3.out", "w", stdout); ^