Compilare: main.cpp: In function 'int main()': main.cpp:81:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("apm2.in","r",stdin); freopen("apm2.out","w",stdout); ^ main.cpp:81:65: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("apm2.in","r",stdin); freopen("apm2.out","w",stdout); ^ main.cpp:82:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&m,&q); ^ main.cpp:90:48: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&g[i].a,&g[i].b,&g[i].x); ^ main.cpp:94:38: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x[i].a,&x[i].b); ^