Compilare: main.cpp: In function 'int main()': main.cpp:53:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < pr[ v[i] ].size(); j++){ ~~^~~~~~~~~~~~~~~~~~~ main.cpp:56:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ii < d[i + 1].size() && d[i + 1][ii].f < x){ ~~~^~~~~~~~~~~~~~~~~ main.cpp:59:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ii < d[i + 1].size() && d[i + 1][ii].f == x){ ~~~^~~~~~~~~~~~~~~~~ main.cpp:67:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ii = 0; ii < d[i - 1].size(); ii++){ ~~~^~~~~~~~~~~~~~~~~ main.cpp:72:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ii = 0; ii < d[i].size(); ii++){ ~~~^~~~~~~~~~~~~ main.cpp:77:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ii = 0; ii < d[i].size(); ii++){ ~~~^~~~~~~~~~~~~ main.cpp:85:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ii = 0; ii < d[j].size(); ii++){ ~~~^~~~~~~~~~~~~ main.cpp:96:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ii = 0; ii < d[j].size(); ii++){ ~~~^~~~~~~~~~~~~ main.cpp:105:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ii = 0; ii < d[j + 2].size(); ii++){ ~~~^~~~~~~~~~~~~~~~~ main.cpp:112:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ii = 0; ii < d[j + 1].size(); ii++){ ~~~^~~~~~~~~~~~~~~~~