Compilare: main.cpp: In function 'void doRight(int)': main.cpp:99:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int next=0; next<graph[node].size(); ++next) doRight(graph[node][next]); ~~~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void read()': main.cpp:39:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("omizi.in", "r", stdin); ^ main.cpp:40:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ main.cpp:42:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int x; scanf("%d", &x); ^ main.cpp:45:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^ main.cpp:50:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); fgetc(stdin); ^ main.cpp:51:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%c", &c); ^ main.cpp: In function 'void write()': main.cpp:84:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("omizi.out", "w", stdout); ^