Compilare: main.cpp: In function 'void mul(long long unsigned int (*)[2], long long unsigned int (*)[2])': main.cpp:14:13: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(k=0;k<2;k++) ^~~ main.cpp:16:17: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' c[i][j] = c[i][j]%MOD; ^ main.cpp:16:33: warning: array subscript is above array bounds [-Warray-bounds] c[i][j] = c[i][j]%MOD; ~~~~~~^ main.cpp:16:30: warning: array subscript is above array bounds [-Warray-bounds] c[i][j] = c[i][j]%MOD; ~~~^ main.cpp:16:23: warning: array subscript is above array bounds [-Warray-bounds] c[i][j] = c[i][j]%MOD; ~~~~~~^ main.cpp:16:20: warning: array subscript is above array bounds [-Warray-bounds] c[i][j] = c[i][j]%MOD; ~~~^