Compilare: main.cpp: In function 'void baga(int)': main.cpp:13:21: warning: unused variable 'x' [-Wunused-variable] int i, nr, val, x, mmin = INF; ^ main.cpp: In function 'void solve()': main.cpp:29:12: warning: unused variable 'val' [-Wunused-variable] int i, val, x; ^~~ main.cpp: In function 'void brute()': main.cpp:45:24: warning: unused variable 'x' [-Wunused-variable] int p[2][2], i, j, x, nr, val, t, mmin; ^ main.cpp: In function 'void solve()': main.cpp:33:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ main.cpp:35:37: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x), A[i&1][x]++; ^ main.cpp: In function 'int main()': main.cpp:64:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("palind2.in", "rt", stdin); ^ main.cpp:65:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("palind2.out", "wt", stdout); ^ main.cpp:69:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &teste); ^