Compilare: user.cpp: In function ‘int main()’: user.cpp:31:18: warning: unused variable ‘k’ [-Wunused-variable] int ans = 0, k = 0, M1 = 0, M2 = 0; ^ user.cpp:12:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("concurs2.in","r",stdin); ^ user.cpp:13:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("concurs2.out","w",stdout); ^ user.cpp:19:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &n); ^ user.cpp:23:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n", &x, &y); ^ user.cpp:57:45: warning: ‘ind2’ may be used uninitialized in this function [-Wmaybe-uninitialized] while (v[ind1].first == M1 && v[ind2].first == M2 && n) { ^ user.cpp:48:20: warning: ‘ind1’ may be used uninitialized in this function [-Wmaybe-uninitialized] int cn = n, j, ind1, ind2; ^