Compilare: main.cpp: In function 'int main()': main.cpp:8:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("stalpi3.in","r",stdin); ^ main.cpp:9:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("stalpi3.out","w",stdout); ^ main.cpp:14:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&d); ^ main.cpp:17:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] { scanf("%d %d",&j,&cul); ^ main.cpp:23:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] { scanf("%d %d",&j,&cul); ^ main.cpp:34:10: warning: iteration 29999 invokes undefined behavior [-Waggressive-loop-optimizations] if(culB[i]==k) xb=i; ~~~~~~^ main.cpp:31:22: note: within this loop for(i=1,xa=xb=0;i<=30000;++i) ~^~~~~~~ main.cpp:47:11: warning: iteration 99 invokes undefined behavior [-Waggressive-loop-optimizations] if(x[i]) printf("%d %d\n",x[i],y[i]); ~~~^ main.cpp:46:10: note: within this loop for(i=1;i<=100;++i) ~^~~~~