Compilare: main.cpp: In function 'void ReadGraph()': main.cpp:64:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); graph.resize(n + 1); ^ main.cpp:66:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int u, v; scanf("%d%d", &u, &v); ^ main.cpp: In function 'void AddInitialTraffickers()': main.cpp:177:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int k; scanf("%d", &k); ^ main.cpp:180:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int u, v; scanf("%d%d", &u, &v); ^ main.cpp: In function 'void ProcessOperations()': main.cpp:214:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int q; scanf("%d", &q); ^ main.cpp:217:51: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int type, u, v; scanf("%d%d%d", &type, &u, &v); ^ main.cpp:224:42: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int t1, t2; scanf("%d%d", &t1, &t2); ^ main.cpp: In function 'int main()': main.cpp:233:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("traffickers.in","r",stdin); ^ main.cpp:234:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("traffickers.out","w",stdout); ^