Compilare: main.cpp: In function 'int main()': main.cpp:57:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v.size();j++) ~^~~~~~~~~ main.cpp:64:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j2=0;j2<v[j].size()-1;j2++) ~~^~~~~~~~~~~~~~ main.cpp:104:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v.size();i++) ~^~~~~~~~~ main.cpp:116:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[i].size();j++) ~^~~~~~~~~~~~ main.cpp:117:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[i][j].intersectii.size()>maxl) ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~ main.cpp:125:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[i][maxj].intersectii.size();j++) ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:149:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v.size();i++) ~^~~~~~~~~ main.cpp:150:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(maxl<v[i].size()) ~~~~^~~~~~~~~~~~ main.cpp:155:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(maxl==v[i].size()) ~~~~^~~~~~~~~~~~~ main.cpp:48:18: warning: unused variable 'x' [-Wunused-variable] int n,i,j,j2,x,y,r,sem=0; ^ main.cpp:48:20: warning: unused variable 'y' [-Wunused-variable] int n,i,j,j2,x,y,r,sem=0; ^ main.cpp:48:22: warning: unused variable 'r' [-Wunused-variable] int n,i,j,j2,x,y,r,sem=0; ^