Compilare: main.cpp: In function 'int main()': main.cpp:217:3: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(j=1;j<=M;j++) ^~~ main.cpp:220:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' return 0; ^~~~~~