Compilare: user.cpp: In function ‘int main()’: user.cpp:21:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] per[x][y]=per[y][x]=1; ^ user.cpp:21:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] per[x][y]=per[y][x]=1; ^ user.cpp:21:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] per[x][y]=per[y][x]=1; ^ user.cpp:21:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] per[x][y]=per[y][x]=1; ^ user.cpp:24:35: warning: array subscript has type ‘char’ [-Wchar-subscripts] for(x='a'; x<='z'; ++x) d[1][x]=1; ^ user.cpp:30:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(!per[x][y]) ^ user.cpp:30:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(!per[x][y]) ^ user.cpp:31:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] d[i][x] += d[i-1][y]; ^ user.cpp:31:32: warning: array subscript has type ‘char’ [-Wchar-subscripts] d[i][x] += d[i-1][y]; ^ user.cpp:33:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] d[i][x]%=Mod; ^ user.cpp:37:40: warning: array subscript has type ‘char’ [-Wchar-subscripts] for(x='a'; x<='z'; ++x) s += d[n][x]; ^ user.cpp:13:36: 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); ^ user.cpp:14:38: 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); ^ user.cpp:16:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d\n", &n, &m); ^ user.cpp:20:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c %c\n", &x, &y); ^