Compilare: main.cpp: In function 'void dfs(int)': main.cpp:14:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<g[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:54:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=1;j<c[i].size();j++){ ~^~~~~~~~~~~~ main.cpp:58:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (k=0;k<g[nra].size();k++){ ~^~~~~~~~~~~~~~ main.cpp:62:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (k<g[nra].size()) ~^~~~~~~~~~~~~~ main.cpp:66:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (actual<c[i].size()-1-actual) ~~~~~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:73:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=1;j<c[i].size();j++){ ~^~~~~~~~~~~~ main.cpp:76:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (k=0;k<g[nra].size();k++){ ~^~~~~~~~~~~~~~ main.cpp:80:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (k==g[nra].size()){ ~^~~~~~~~~~~~~~~ main.cpp:23:35: warning: unused variable 'vecin' [-Wunused-variable] int n,i,sol,actual,j,k,nr,nra,vecin; ^~~~~ main.cpp:24:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&n); ^ main.cpp:26:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&v[i]); ^ main.cpp:28:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&w[i]); ^