Compilare: main.cpp: In function 'int main()': main.cpp:44:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < normX.size(); ++i) ~~^~~~~~~~~~~~~~ main.cpp:46:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < normY.size(); ++i) ~~^~~~~~~~~~~~~~ main.cpp:59:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < mars.size(); ++i) ~~^~~~~~~~~~~~~ main.cpp:60:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < mars[i].size(); ++j) ~~^~~~~~~~~~~~~~~~ main.cpp:71:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] nr += 1LL * ((i==normX.size()?n:normX[i+1])-normX[i]) * ~^~~~~~~~~~~~~~ main.cpp:72:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] ((j==normY.size()?m:normY[j+1])-normY[j]); ~^~~~~~~~~~~~~~