Compilare: main.cpp: In function 'void read()': main.cpp:39:26: warning: array subscript has type 'char' [-Wchar-subscripts] graph[chartoint[x]].push_back(chartoint[y]); ^ main.cpp:39:50: warning: array subscript has type 'char' [-Wchar-subscripts] graph[chartoint[x]].push_back(chartoint[y]); ^ main.cpp:40:27: warning: array subscript has type 'char' [-Wchar-subscripts] bgraph[chartoint[y]].push_back(chartoint[x]); ^ main.cpp:40:51: warning: array subscript has type 'char' [-Wchar-subscripts] bgraph[chartoint[y]].push_back(chartoint[x]); ^ main.cpp:41:25: warning: array subscript has type 'char' [-Wchar-subscripts] ++in[chartoint[y]]; ^ main.cpp:42:26: warning: array subscript has type 'char' [-Wchar-subscripts] ++out[chartoint[x]]; ^ main.cpp:43:17: warning: array subscript has type 'char' [-Wchar-subscripts] exists[x]=exists[y]=true; ^ main.cpp:43:27: warning: array subscript has type 'char' [-Wchar-subscripts] exists[x]=exists[y]=true; ^ main.cpp:24:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("path.in", "r", stdin); ^ main.cpp:25:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &m, &k); ^ main.cpp:38:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%c%c%c", &x, &e, &y); fgetc(stdin); ^ main.cpp: In function 'void write()': main.cpp:66:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("path.out", "w", stdout); ^