Compilare: main.cpp: In function 'bool is_somewhere(int)': main.cpp:31:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0 ; j < v.size() ; j++) ~~^~~~~~~~~~ main.cpp: In function 'void beckateu(int)': main.cpp:49:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k == v.size() + 1){ ~~^~~~~~~~~~~~~~~ main.cpp:58:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < v.size() ; i++){ ~~^~~~~~~~~~ main.cpp:66:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < v.size() ; i++) ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:96:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0 ; i < v.size() ; i++) ~~^~~~~~~~~~ main.cpp:97:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = i + 1 ; j < v.size() ; j++) ~~^~~~~~~~~~ main.cpp:101:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ii = 2 ; ii < v[i].size() ; ii++){ ~~~^~~~~~~~~~~~~ main.cpp:112:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(jj = 2 ; jj < v[j].size() ; jj++){ ~~~^~~~~~~~~~~~~ main.cpp:124:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 2 ; i <= v.size() ; i++){ ~~^~~~~~~~~~~ main.cpp:125:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = mat[ans[i - 1]][ans[i]] + 1 ; j < v[ans[i]].size() ; j++) ~~^~~~~~~~~~~~~~~~~~ main.cpp:79:21: warning: unused variable 'k' [-Wunused-variable] int i,j,q,ii,jj,k; ^ main.cpp:95:9: warning: unused variable 'maxx' [-Wunused-variable] int maxx = 0; ^~~~