Compilare: main.cpp: In function 'int main()': main.cpp:18:76: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if(a[k][j] && a[i][k] && (a[k][j]+a[i][k]<=a[i][j] || i!=j && !a[i][j])) ~~~~~^~~~~~~~~~~ main.cpp:15:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int k=1; k<=n; k++) ^~~ main.cpp:23:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' for(int i=1; i<=n; i++) ^~~