Compilare: main.cpp: In function 'int main()': main.cpp:35:24: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'char*' [-Wformat=] scanf("%d", &a[i][j]); ^ main.cpp:59:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < buckets[ndx].size(); ++i) { ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:28:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("padure.in", "r", stdin); ^ main.cpp:29:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("padure.out", "w", stdout); ^ main.cpp:31:56: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d %d %d", &n, &m, &si, &sj, &di, &dj); ^ main.cpp:35:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i][j]); ^