38 lines · cpp
1#include "stub.h"2 3int total = 0;4 5int inc(int x) {6 switch (x) {7 case 0: total += 1 + 0; return 1;8 case 1: total += 1 + 1; return 2;9 case 2: total += 1 + 2; return 3;10 case 3: total += 1 + 3; return 4;11 case 4: total += 1 + 4; return 5;12 case 5: total += 1 + 5; return 6;13 default: return x + 1;14 }15}16 17int inc_dup(int x) {18 switch (x) {19 case 0: total += 2 + 0; return 1;20 case 1: total += 2 + 1; return 2;21 case 2: total += 2 + 2; return 3;22 case 3: total += 2 + 3; return 4;23 case 4: total += 2 + 4; return 5;24 case 5: total += 2 + 5; return 6;25 default: return x + 1;26 }27}28 29int main() {30 int c = 0;31 for (int i = 0; i < 10000000; ++i) {32 int a = rand() % 7;33 int b = rand() % 7;34 c += inc(a) - 2*inc_dup(b);35 }36 return c == 0;37}38