Compilare: main.cpp: In function 'int cautb(int, int)': main.cpp:18:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pas+p2<=sv[strat].size() && sv[strat][pas+p2].poz<=poz) ~~~~~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:64:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=1;j<sv[i].size();j++){ ~^~~~~~~~~~~~~ main.cpp:76:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<sv[i].size();j++){ ~^~~~~~~~~~~~~ main.cpp:94:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<sv[i].size() && ok==1;j++){ ~^~~~~~~~~~~~~ main.cpp:96:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(sv[i][j].nrelem==1<<i && sv[i][j].prod!=sv[i][j].val) main.cpp:50:22: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&n); ^ main.cpp:53:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d",&x,&y,&z); ^ main.cpp: In function 'int main()': main.cpp:110:24: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&nrt); ^