Compilare: user.cpp: In function ‘void multiply(std::vector<int>&, int)’: user.cpp:43:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<A.size()||t>0;i++){ ^ user.cpp:44:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i<A.size()){ ^ user.cpp: In function ‘void add(std::vector<int>&, std::vector<int>&, std::vector<int>&)’: user.cpp:66:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<A.size()||i<B.size()||t>0;i++){ ^ user.cpp:66:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<A.size()||i<B.size()||t>0;i++){ ^ user.cpp:67:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i<A.size()) ^ user.cpp:69:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i<B.size()) ^ user.cpp: In function ‘int main()’: user.cpp:118:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<rez.size()||t>0;i++){ ^ user.cpp:119:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(rez.size()>i){ ^ user.cpp:101:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&n,&t); ^