Compilare: user.cpp: In function ‘void raiseTo(long long unsigned int (*)[3], long long unsigned int)’: user.cpp:32:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 2; i <= p; i *= 2) ^ user.cpp:37:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i < p) ^ user.cpp:39:70: warning: narrowing conversion of ‘a’ from ‘int’ to ‘long long unsigned int’ inside { } [-Wnarrowing] unsigned long long B[3][3] = {{a, b, c}, {1, 0, 0}, {0, 1, 0}}; ^ user.cpp:39:70: warning: narrowing conversion of ‘b’ from ‘int’ to ‘long long unsigned int’ inside { } [-Wnarrowing] user.cpp:39:70: warning: narrowing conversion of ‘c’ from ‘int’ to ‘long long unsigned int’ inside { } [-Wnarrowing] user.cpp: In function ‘int main()’: user.cpp:55:70: warning: narrowing conversion of ‘a’ from ‘int’ to ‘long long unsigned int’ inside { } [-Wnarrowing] unsigned long long A[3][3] = {{a, b, c}, {1, 0, 0}, {0, 1, 0}}; ^ user.cpp:55:70: warning: narrowing conversion of ‘b’ from ‘int’ to ‘long long unsigned int’ inside { } [-Wnarrowing] user.cpp:55:70: warning: narrowing conversion of ‘c’ from ‘int’ to ‘long long unsigned int’ inside { } [-Wnarrowing] user.cpp:50:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &T); ^ user.cpp:54:74: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d %d %d %d %d %llu", &x, &y, &z, &a, &b, &c, &n); ^