Compilare: main.cpp: In function 'int main()': main.cpp:26:10: warning: array subscript has type 'char' [-Wchar-subscripts] car[a][b] = car[b][a] = 1; ^ main.cpp:26:13: warning: array subscript has type 'char' [-Wchar-subscripts] car[a][b] = car[b][a] = 1; ^ main.cpp:26:22: warning: array subscript has type 'char' [-Wchar-subscripts] car[a][b] = car[b][a] = 1; ^ main.cpp:26:25: warning: array subscript has type 'char' [-Wchar-subscripts] car[a][b] = car[b][a] = 1; ^ main.cpp:29:12: warning: array subscript has type 'char' [-Wchar-subscripts] dp[1][c] = 1; ^ main.cpp:32:21: warning: array subscript has type 'char' [-Wchar-subscripts] dp[i % 2][next] = 0; ^ main.cpp:34:21: warning: array subscript has type 'char' [-Wchar-subscripts] if (car[next][last] == 0) ^ main.cpp:34:27: warning: array subscript has type 'char' [-Wchar-subscripts] if (car[next][last] == 0) ^ main.cpp:35:30: warning: array subscript has type 'char' [-Wchar-subscripts] add (dp[i % 2][next], dp[1 - i % 2][last]); ^ main.cpp:35:51: warning: array subscript has type 'char' [-Wchar-subscripts] add (dp[i % 2][next], dp[1 - i % 2][last]); ^ main.cpp:39:26: warning: array subscript has type 'char' [-Wchar-subscripts] add (sol, dp[n % 2][c]); ^ main.cpp:19:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("nrcuv.in", "r", stdin); ^ main.cpp:20:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("nrcuv.out", "w", stdout); ^ main.cpp:21:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d\n", &n, &m); ^ main.cpp:23:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%c %c\n", &a, &b); ^