Compilare: user.cpp: In function ‘int main()’: user.cpp:81:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<poz[i].size();j++) add(poz[i][j].first,poz[i][j].second); ^ user.cpp:84:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<poz[i].size();j++) ^ user.cpp:90:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<poz[i].size();j++) ^ user.cpp:98:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<poz[down].size();j++) add(poz[down][j].first,poz[down][j].second); ^ user.cpp: In function ‘void inc()’: user.cpp:48:35: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(pars,1,Buffer,stdin); ^ user.cpp: In function ‘int main()’: user.cpp:63:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mexc.in","r",stdin); ^ user.cpp:64:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mexc.out","w",stdout); ^ user.cpp:65:31: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(pars,1,Buffer,stdin); ^