Compilare: main.cpp: In function 'int main()': main.cpp:26:135: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(((i != n && v[i][pointer[i]] < v[i+1][pointer[i+1]]) || (i != 1 && v[i][pointer[i]] < v[i-1][pointer[i-1]])) && pointer[i] <= v[i].size()){ ~~~~~~~~~~~^~~~~~~~~~~~~~ main.cpp:34:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pointer[i] >= v[i].size()) ~~~~~~~~~~~^~~~~~~~~~~~~~ main.cpp:47:1: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(i=1;i<=nr;i++) ^~~ main.cpp:49:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' return 0; ^~~~~~