Compilare: user.cpp: In function ‘int codePair(char, char)’: user.cpp:19:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] return cpair[a][b]; ^ user.cpp:19:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] return cpair[a][b]; ^ user.cpp: In function ‘int main()’: user.cpp:73:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] cpair[a][b] = ++ n; ^ user.cpp:73:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] cpair[a][b] = ++ n; ^ user.cpp:67:15: warning: unused variable ‘codeA’ [-Wunused-variable] int node, codeA, codeB, minFlow, ans, code, n, m, i; ^ user.cpp:67:22: warning: unused variable ‘codeB’ [-Wunused-variable] int node, codeA, codeB, minFlow, ans, code, n, m, i; ^ user.cpp:65:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("teroristi.in", "r", stdin); ^ user.cpp:66:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("teroristi.out", "w", stdout); ^ user.cpp:75:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:76:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n", txt); ^ user.cpp:79:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c %c\n", &a, &b); ^