Compilare: main.cpp: In function 'void solve()': main.cpp:211:33: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<str>::size_type {aka long unsigned int}' [-Wformat=] printf("%d\n",sol.size()); ^ main.cpp:213:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sol.size();i++) printf("%d %d %d\n",sol[i].p1,sol[i].p2,sol[i].val); ~^~~~~~~~~~~ main.cpp: In function 'void citeste(int&)': main.cpp:49:53: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] if(++poz==DIM) fread(buff,1,DIM,stdin),poz=0; ^ main.cpp:57:53: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] if(++poz==DIM) fread(buff,1,DIM,stdin),poz=0; ^ main.cpp:71:53: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] if(++poz==DIM) fread(buff,1,DIM,stdin),poz=0; ^ main.cpp: In function 'int main()': main.cpp:223:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("traseu2.in","r",stdin); ^ main.cpp:225:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("traseu2.out","w",stdout); ^