Compilare: main.cpp: In function 'int main()': main.cpp:132:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &t, &T); ^ main.cpp:136:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ main.cpp:139:44: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &P[i].x, &P[i].y); ^ main.cpp:117:31: warning: 'v' may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%d %d\n", u + 1, v + 1); ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:108:25: note: 'v' was declared here int v; ^