Compilare: main.cpp: In function 'void Euler()': main.cpp:36:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(id[x] < L[x].size()) stiva[++vf] = L[x][ id[x]++ ]; ~~~~~~^~~~~~~~~~~~~ main.cpp:6:11: warning: unused variable 'second' [-Wunused-variable] #define y second ^ main.cpp:28:11: note: in expansion of macro 'y' int x,y,vf; ^ main.cpp: In function 'void Graph()': main.cpp:93:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < F[k].size(); i = j) ~~^~~~~~~~~~~~~ main.cpp:95:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = i; j < F[k].size() && F[k][i] == F[k][j]; ++j); ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:107:38: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d %d\n",&n,&m,&Q); ^ main.cpp:110:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%s",temp); ^ main.cpp:120:50: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d %d %d",&x1,&y1,&x2,&y2); ^ main.cpp: In function 'void Graph()': main.cpp:43:13: warning: 'k' may be used uninitialized in this function [-Wmaybe-uninitialized] int i,j,k,t,inc,sf,x,y,x0,y0; ^