Compilare: main.cpp: In function 'int main()': main.cpp:75:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ssm.txt", "r", stdin); ^ main.cpp:76:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ssm.out", "w", stdout); ^ main.cpp: In function 'void solve(int*, int)': main.cpp:71:50: warning: 'indexI' may be used uninitialized in this function [-Wmaybe-uninitialized] cout << si << " " << indexJ+2 << " " << indexI+1; ^